quadgram

This is a table of type quadgram and their frequencies. Use it to search & browse the list to learn more about your study carrel.

quadgram frequency
in the case of133
on the other hand124
the nature of the71
of the same species62
the conditions of life60
with respect to the56
the case of the52
in the same manner51
to a certain extent51
of animals and plants45
in the course of43
of use and disuse42
effects of use and39
at the same time38
in a state of38
there can be no37
a state of nature37
in the zoological gardens36
the development of the36
individuals of the same35
the effects of use32
we have seen that30
changed conditions of life29
a large number of28
the colour of the28
the fact that the27
as in the case27
can be no doubt27
animals and plants under26
and plants under domestication26
reason to believe that26
of the effects of25
variation of animals and25
the same manner as24
it is impossible to24
the members of the24
so it is with24
the varieties of the23
in regard to the23
i do not know22
for the most part22
parts of the body22
a long series of21
it is difficult to21
in the conditions of21
is one of the20
of the same family20
be no doubt that20
it is certain that19
with their own pollen19
the length of the19
the direct action of19
it is well known19
it is probable that19
by the pollen of19
as well as the18
development of the wings18
of the wings of18
as we shall see18
the shape of the18
in a future chapter18
the effects of the18
informs me that he17
vary in the same17
one of the most17
the individuals of the17
that is to say17
the act of crossing17
we do not know17
the male and female17
of the insect tribes17
slight changes in the17
in the last chapter17
changes in the conditions17
the size of the17
the evil effects of17
of the nature of16
is by no means16
differ from each other16
which they have been16
the theory of selection16
at the present day16
the case with the16
we may conclude that16
as a matter of16
as we have seen16
on one of the15
the definite action of15
by the fact that15
action of changed conditions15
the distribution of the15
the structure of the15
effects of close interbreeding15
of the same variety15
on the development of15
on the nature of15
is well known that15
to believe that the15
the character of the14
on the effects of14
as far as i14
corresponding periods of life14
a greater or less14
inheritance of the effects14
the inherited effects of14
the pollen of a14
the origin of the14
in the west indies14
of a distinct species14
we have seen in14
there is no reason14
we shall see in14
members of the same14
in accordance with the13
on the authority of13
at corresponding periods of13
on the breeding of13
in the chapter on13
the form of the13
we are led to13
without the aid of13
we shall presently see13
that this is the13
is no reason to13
the principle of selection13
is due to the13
a large proportion of13
to the action of13
to the fact that13
have seen in the13
in different parts of13
have been exposed to13
the conditions to which13
as that of the13
to vary in the13
to which they have13
the rest of the13
part of the body13
a variety of the13
inheritance at corresponding periods12
a few of the12
to be the case12
could not have been12
more or less sterile12
a consequence of the12
dimorphic and trimorphic plants12
as a consequence of12
in the light of12
cape of good hope12
it seems to me12
of the inheritance of12
in the same direction12
a vast number of12
fertilised by the pollen12
by their own pollen12
fertilised by their own12
a change in the12
an arrest of development12
effects of natural selection12
for the sake of12
on the one hand12
the number of the12
the constitution of the12
it is possible that12
but there is no12
it is with the12
the offspring of the12
this is the case12
of the madeira islands12
it is said that12
from each other in12
in the direction of12
varieties of the same12
the inheritance of the12
in this case the12
the crossing of distinct12
different parts of the12
inheritance of acquired characters11
that there is no11
is that of the11
to the conclusion that11
is the case with11
as the result of11
the tendency to reversion11
all parts of the11
it might have been11
in the earlier chapters11
the cape of good11
of varieties of the11
with the exception of11
by the union of11
animals and cultivated plants11
transmission of acquired characters11
of the same nature11
of change of soil11
was shown in the11
analogous facts have been11
of the same individual11
i may add that11
various parts of the11
one of the madeira11
parts of the world11
facts have been observed11
we may infer that11
on the origin of11
may be due to11
of the organic world11
by the aid of11
change of soil to11
far as i can11
sides of the body11
cases in which the11
in the fact that11
crossing of varieties of11
the inheritance of acquired11
in nearly the same11
it is clear that11
to account for the10
far as we can10
evil effects of close10
from the fact that10
at the end of10
for the production of10
by the nature of10
as a cause of10
their conditions of life10
and in some cases10
that the effects of10
it is to be10
so far as the10
in the same way10
the effects of disuse10
breeds of the fowl10
the course of time10
that the crossing of10
the appearance of a10
in a former chapter10
might have been expected10
in the number of10
to the nature of10
domesticated animals and cultivated10
there is reason to10
to the inheritance of10
in their native country10
origin of the dog10
the position of the10
pollen of a distinct10
the history of the10
of the reproductive organs10
are more or less10
and so it is10
of the madeiran group10
have seen that the10
there can be little10
of the conditions of10
the weight of the10
in some few cases10
species of the same10
common to madeira and10
in the formation of10
so far as i10
that it is a10
on the fertility of10
on account of their10
so far as to10
on the summit of10
use or disuse of10
can be little doubt10
it has been found10
the study of variation10
of the appearance of10
will be found to9
the case of a9
from a distinct plant9
a long course of9
in the first generation9
of the two forms9
advantage of change of9
large number of individuals9
which we have been9
than it is in9
it is not surprising9
animals and plants which9
the power of selection9
as far as we9
no reason to believe9
the state of the9
and on the other9
the right and left9
of our domesticated animals9
when we reflect on9
to which they are9
the growth of the9
but i do not9
is well known to9
see in a future9
direct action of the9
by its own pollen9
to suppose that the9
derived from a cross9
conditions to which they9
the action of the9
as shown by the9
have been observed with9
definite action of the9
its concentration in s9
to show that the9
the origin of species9
prepotency of transmission in9
descended from the same9
accounted for by the9
in the swiss lake9
for the reason that9
the struggle for existence9
to the formation of9
a more or less9
in the nature of9
is reason to believe9
the summit of the9
reason to suppose that9
it is notorious that9
the transmission of acquired9
natural or artificial selection9
facts given in the9
it would appear that9
disuse of parts in9
on the same side9
in the united states9
shall see in a9
to which it is9
with the pollen of9
in support of this9
the appearance of the9
be accounted for by9
from a common progenitor9
use and disuse of9
to the development of9
it is evident that9
to madeira and sicily9
we know that the9
be little doubt that9
with its own pollen9
of the higher animals9
from a cross between8
may be seen in8
during a long series8
gemmules derived from the8
and it is not8
effect of foreign pollen8
as one of the8
in various parts of8
in the same individual8
in the higher animals8
the production of a8
the two sides of8
the development of each8
have been brought about8
from changed conditions of8
the species of the8
of disuse of parts8
has been known to8
to breed in captivity8
plants of the same8
in the neighbourhood of8
the horse and ass8
the end of the8
effects of disuse of8
no reason to suppose8
we have already seen8
it may perhaps be8
difference in fertility between8
at a very early8
be the case with8
of secondary sexual characters8
of the origin of8
the direction of the8
the facts given in8
that there is a8
on the whole the8
from the effects of8
bear in mind that8
be said to be8
as i hear from8
in so far as8
species of the genus8
is not surprising that8
of the theory of8
good reason to believe8
of the organic creation8
as is well known8
opposite sides of the8
of foreign pollen on8
it is in the8
there must be some8
as a general rule8
have been observed in8
the gemmules derived from8
as due to the8
change in the conditions8
appearance of new characters8
and that it is8
are supposed to be8
but it may be8
in the development of8
the hypothesis of pangenesis8
in the south of8
of the principle of8
the formation of new8
for the study of8
is probable that the8
facts could be given8
it will be found8
with that of the8
on the inheritance of8
of the same genus8
the fact that in8
the causes of variation8
in the colour of8
would seem to be8
perhaps a state of8
me that he has8
we see that the8
we reflect on the8
right and left sides8
in spite of the8
of the falkland islands8
in the distribution of8
have already seen that8
the greater number of8
in the animal kingdom8
in some of the8
on a broad scale8
the difference in fertility8
to the theory of8
on the difference in8
like those of the8
long intervals of time8
the difference between the8
that there is some8
do not know whether8
of domestic and wild8
to me by mr8
the cause of the8
survival of the fittest8
be due to the8
on the cultivation of8
prepotency of transmission of8
in support of the8
i am informed by8
is due to a8
that it is only8
attention to the fact7
the surface of the7
beings in a state7
in the constitution of7
the principle of inheritance7
may be said to7
but in this case7
nearly the same manner7
may conclude that the7
with respect to plants7
in the same country7
of the nervous system7
after an interval of7
crossing of domestic and7
and in the other7
in exactly the same7
in the transmission of7
two distinct states of7
the limits of the7
to the present day7
materials for the study7
we thus see that7
the course of a7
in the north of7
on the dezerta grande7
of the same plant7
the action of certain7
kept in the same7
our being able to7
side of the body7
a matter of fact7
be a doubt that7
on the stigma of7
are said to be7
it is by no7
must be attributed to7
be regarded as a7
of crossing in itself7
on the conditions of7
of inheritance at corresponding7
varieties of the apple7
sterility of crossed species7
i believe that the7
be attributed to the7
i have heard of7
on the variability of7
it has been observed7
the existence of a7
to a large extent7
the present state of7
in the first place7
that it is in7
in the one case7
to the attacks of7
in this case we7
action of the conditions7
it is scarcely possible7
we must believe that7
through the reproductive system7
in the scilly islands7
species in a state7
there is only one7
to the production of7
as well as of7
on opposite sides of7
at the present time7
summary of the three7
presence or absence of7
a considerable number of7
the appearance of new7
to which i have7
i hear from mr7
the characters of the7
be fertilised by the7
but it is not7
displacement of the zero7
in spite of this7
the base of the7
in our own country7
breeds of the pigeon7
which have long been7
the sterility of hybrids7
of the same sex7
at an early age7
on the evil effects7
the direction of variation7
from time to time7
in comparison with the7
to be fertilised by7
it at first appears7
the greater or less7
parts of the same7
of the organs of7
a case in point7
ready to be evolved7
of the characters of7
each other in their7
flowers on the same7
in a greater or7
which it has been7
on the crossing of7
of tierra del fuego7
the great principle of7
as i am informed7
the good effects of7
units of the body7
cases could be given7
organic beings in a7
the distinction between the7
on the varieties of7
nature of the conditions7
in which they are7
amount of difference between7
we have also seen7
by the conditions of7
in the eleventh chapter7
a difference in the7
the inheritance of a7
that many of the7
as well as in7
to the same conclusion7
to which we have7
the result of a7
and it has been7
have been derived from7
little doubt that the7
their peculiarity to s7
the survival of the7
in a position to7
have been recorded of7
that the act of7
in the structure of7
the aid of selection7
on the selection of7
and in this case7
the parts of the7
act of crossing in7
the various kinds of7
as it at first7
the opposite sides of7
the seed of the7
on the same plant7
sense of the word7
in the shape of7
the outward contour of7
during their early development7
be looked at as7
pollen from a distinct7
from the facts given6
would not wish to6
it is true that6
the south of france6
not in the least6
coloured varieties of the6
members of the insect6
we bear in mind6
from generation to generation6
seems to be a6
one side of the6
in the following chapter6
greater or less degree6
of the varieties of6
the fruit of the6
when we bear in6
in proportion to the6
modern classification of insects6
organs of sight and6
we are able to6
religion of nature delineated6
be seen in the6
the change in the6
the result of the6
period of appearance of6
that in all cases6
with the colour of6
greater or less extent6
it is stated that6
of the insect world6
in the offspring of6
in the production of6
the importance of the6
that it is impossible6
some of the cases6
the inherited effect of6
are well known to6
an early period of6
in a more or6
characters of the two6
as to the nature6
it may be that6
certain varieties of the6
are on the whole6
from first to last6
more or less completely6
by pollen taken from6
there is good reason6
introduction to the modern6
long series of generations6
to the principle of6
but it would be6
without our being able6
in spite of disuse6
indirectly through the reproductive6
the greatest amount of6
the whole mass of6
in a similar manner6
within the limits of6
in this latter case6
have attempted to show6
the modern classification of6
action of the reproductive6
but we have no6
with pollen from the6
to the modern classification6
at the base of6
cases have been recorded6
on the number of6
in the proportion of6
under their natural conditions6
of the swiss lake6
in the foregoing cases6
every one knows how6
on a variety of6
the influence of the6
has been observed in6
of soil to plants6
when we consider the6
for the development of6
their concentration in australia6
the doctrine of specific6
in the state of6
informs me that the6
of the same flower6
the force of inheritance6
of our own country6
the same flower or6
in the madeira islands6
in the same species6
allowed to cross freely6
we have no reason6
inheritance in the horse6
the eggs of the6
with animals and plants6
conditions of life on6
and the nature of6
as shown in the6
the animal and vegetable6
exactly the same manner6
the degree of sterility6
might have been thought6
at long intervals of6
to be evolved under6
to an extreme point6
varieties of the plum6
this part of the6
feral animals and plants6
with the result that6
have also seen that6
a cause of variability6
in the highest degree6
to selection by man6
well known to be6
with the view that6
it was shown in6
not in any way6
given in the earlier6
tend to be inherited6
domesticated animals and plants6
the principle of economy6
i have attempted to6
to be met with6
as a result of6
nature of the food6
that some of the6
the good derived from6
is scarcely possible to6
it is only in6
that it may be6
two sides of the6
like that of the6
with regard to the6
a cause of sterility6
would not have been6
to the selection of6
how it is that6
the way in which6
large proportion of the6
crossing of white and6
have the power of6
manner in which the6
according to our hypothesis6
of the body is6
it can hardly be6
by the law of6
in the ninth chapter6
one or the other6
is a much more6
effects of changed conditions6
the case of plants6
on the good effects6
the application of the6
the coloration of the6
in our domesticated animals6
of the two species6
the aid of a6
of the body in6
it must have been6
they have not been6
use and disuse are6
to the inherited effects6
the process of selection6
other parts of the6
the case of animals6
the root of the6
to some of the6
modified in the same6
as it seems to6
it would be interesting6
the various forms of6
true it is that6
are the result of6
to be due to6
the principle of the6
there is evidence that6
of sight and hearing6
period of gestation in6
from their natural conditions6
i am aware that6
the union of two6
crossed with a distinct6
feet above the sea6
we ought not to6
the chapter on pangenesis6
an important part in6
favourable to selection by6
the flowers of the6
in all these cases6
in one of the6
it is remarkable that6
which i have already6
as far as the6
on the dogs of6
use and disuse in6
during several generations to6
belong to the same6
the forms of reproduction6
the development of a6
in relation to the6
i am inclined to6
at the cape of6
to look at the6
certain parts of the6
every part of the6
the process by which6
the problem of the6
a certain number of6
as we see in6
in the third generation6
several breeds of the6
a case of reversion6
of male characters by6
assumption of male characters6
number of seeds in6
to a difference in6
which have been long6
the shape of each6
so that it is6
of the last century6
and there can be6
varieties of the pea6
from slight changes in6
can be no question6
found in the swiss6
it has often been6
changed habits of life6
the outward aspect of6
the elements of the6
limits of the same6
a strong tendency to6
of a large number6
the organs of sight6
as we shall presently6
on a large scale6
to a greater or6
parts of the organisation6
shall presently see that6
on the colours of6
the stigma of the6
rendered in some degree6
i have been assured6
it is obvious that6
in the same family6
in the same place6
the reappearance of long6
removed from their natural5
in order that the5
effects of the increased5
plant of the same5
the presence or absence5
in such a way5
we may infer from5
in the latter case5
any change in the5
i refer to the5
in fertility between crossed5
inheritance as limited by5
the pollen of the5
that they would have5
on the effect of5
that there may be5
it is not in5
conditions of life to5
that this is a5
so long as the5
of one of the5
on their outer limits5
always apterous in madeira5
if it can be5
there is no more5
except in the case5
in these cases the5
closely allied natural species5
the manner in which5
all the individuals of5
we are driven to5
in the struggle for5
of transmission in the5
of the domestic duck5
in their conditions of5
of the existence of5
on the fleece of5
in the order of5
is it possible to5
exceptions to the rule5
the absence of the5
of some of the5
the attitude of repose5
the sterility of the5
the first appearance of5
transmitted to the offspring5
to reversion to a5
in these cases we5
i shall perhaps be5
in the absence of5
and one of them5
i have met with5
we may feel assured5
cannot be accounted for5
in their native land5
has the power of5
of use or disuse5
influence of selection on5
we see something of5
in the region of5
in speaking of the5
of heat and cold5
of any other colour5
in the evolution of5
to that of the5
in a large measure5
conditions of life being5
as soon as the5
stigma of the same5
of the male element5
it is very difficult5
of the increased use5
given with respect to5
from the action of5
think it far from5
and some of the5
their concentration in southern5
i would not wish5
on the same tree5
action of the surrounding5
from what we know5
of change in the5
the genetic behaviour of5
under a single point5
formation of new races5
the jardin des plantes5
be more or less5
several members of the5
is not possible to5
the tips of the5
in some cases the5
of the wings in5
be affected by the5
varieties of the potato5
affected by changed conditions5
and that of the5
direct action of changed5
from a distinct individual5
are believed to be5
taken from the same5
but this is not5
the selection of the5
that they are not5
buds on the same5
varieties of the peach5
white variety of v5
concentration in southern africa5
in the first part5
removed from each other5
the effects of crossing5
been brought about by5
at the same age5
will be found in5
by natural or artificial5
and there is no5
that the distinctions between5
the study of the5
of transmission of character5
those cases in which5
being able to assign5
is said to have5
of changed conditions of5
the white variety of5
case has been recorded5
of the process of5
that they should be5
in that of the5
effects of interbreeding on5
in their power of5
other individuals of the5
act on each other5
it will be perceived5
and the effects of5
the great majority of5
of the surrounding conditions5
beneath the control of5
we have been just5
segments in the same5
we must conclude that5
law of nature that5
i have been informed5
be supposed to be5
good is derived from5
remarks on this subject5
the fleece of sheep5
in an analogous manner5
which has long been5
of the pacific islands5
a law of nature5
in the time of5
the effects of long5
in the animal and5
and size of the5
circumstances favourable to selection5
that it has been5
period of action of5
a matter of experience5
of the united states5
a tendency to vary5
have been observed to5
bred in the zoological5
nature of the case5
to the problem of5
have no means of5
the excessive development of5
the increased size of5
which have been exposed5
the division of the5
it may be asked5
with pollen of the5
see this in the5
relation to each other5
called my attention to5
different conditions of life5
on account of the5
in the present instance5
and fertility of the5
inheritance of peculiarities in5
the truth of the5
breeds of the dog5
i think it far5
what we know of5
culinary and agricultural plants5
a single point of5
a long succession of5
in the present state5
the significance of the5
the case may be5
the tissues of the5
at some former period5
appear at first sight5
at about the same5
of dimorphic and trimorphic5
is in some way5
of lost parts in5
so it has been5
at the age of5
of the body are5
are those which have5
with our domesticated animals5
the belief in the5
have been kept in5
by the action of5
the college of surgeons5
here is a more5
have been attended to5
definite action of changed5
i am not aware5
it was shown that5
of the same kind5
in the same animal5
as we now see5
a very early period5
on the insects of5
far at least as5
i have shown in5
feathers on the head5
outward contour of the5
and left sides of5
the tendency to sterility5
of cattle and sheep5
are liable to be5
the fact of the5
of a variety of5
the period of gestation5
in the same flower5
single point of view5
on the same principle5
the steps by which5
on the part of5
many other such cases5
and in the case5
no doubt that this5
the sides of the5
we cannot doubt that5
the two outer toes5
a more curious case5
is difficult to understand5
the tail of the5
as limited by sex5
of feathers on the5
the fertility of the5
reversion in hybrids of5
and i believe that5
in the vegetable kingdom5
that there must be5
minority in crossed races5
persistency of character in5
can be crossed with5
is known to be5
as an instance of5
two or three generations5
merge into each other5
to the definite action5
which can be propagated5
the upper and lower5
in the form of5
use and disuse on5
it is not possible5
with pollen from a5
the subsequent progeny of5
the existence of the5
we must suppose that5
the legs of the5
formed by the union5
as a case of5
be fertilised by their5
so far at least5
of our domesticated productions5
living under their natural5
development of the organs5
and we know that5
to the influence of5
does not seem to5
on the colour of5
the axis of the5
with the varieties of5
the gemmules of the5
on the intercrossing of5
long series of ages5
the young of the5
with a distinct species5
would have to be5
a length of time5
to the court of5
that one of the5
the amount of difference5
when fertilised by the5
at an early period5
functional independence of the5
with reference to the5
it is that the5
a part of the5
during a long course5
our domesticated animals and5
other members of the5
it is possible for5
as they grow old5
in correlation with the5
they have been subjected5
of life to which5
what has been said5
animals and plants have5
and plants which have5
the court of ava5
so that here we5
that it is the5
out of the question5
by the appearance of5
that here we have5
were given in the5
that acquired characters are5
of cases in which5
has remarked that the5
the use of the5
domestic and wild cats5
in the thirteenth chapter5
to the belief that5
we see this in5
of the effect of5
the effect of the5
i have never seen5
differing from each other5
i do not think5
that the production of5
in comparison with those5
increased use or disuse5
the fact that they5
the whole of the5
the cases in which5
the power of inheritance5
of the same country5
the proportion of to5
we shall immediately see5
breeding on the female5
on the growth of5
with those of the5
regeneration of lost parts5
by the act of5
on the history of5
state of the reproductive5
in the cases of5
shall see in the5
in the attitude of5
the facts to be5
of the offspring of5
the two forms are5
to be regarded as5
same flower or fruit5
to the number of5
the power to produce5
in the botanic gardens5
the pigs of the5
they have been exposed5
methodical and unconscious selection5
in all parts of5
to distinguish between the5
to the individuals of5
we have no means5
the summits of the5
is clear that the5
a certain amount of5
belonging to the same5
have seen that in5
in a higher degree5
independence of the elements5
for the inheritance of5
of the species which5
is to a certain5
history of the dog5
the view that the5
in favour of the5
placed on the stigma5
characters derived from a5
is good reason to5
the fact that a5
and in this way5
common to both parents5
be interesting to know5
are eminently liable to5
inherited effects of disuse5
the bones of the5
of the germinal substance5
reciprocal crosses between the5
of the lower animals5
at a corresponding period5
they are supposed to5
as i can judge5
a distinct plant of5
at the same period5
which de vries has5
a latent tendency to5
in the fourth generation5
length of the beak5
we know of the5
of the crossed offspring5
wild animals and plants5
crossing of distinct species5
able to assign any5
regarded as due to5
when we reflect that5
in all such cases5
of the opposite sex5
the effects of natural5
effects of use or5
in the history of5
the power of transmitting5
the same individual animal5
is not the case5
is very difficult to5
of those who have5
summer and winter wheat5
would be interesting to5
conditions to which the5
of the reproductive system5
we are compelled to5
all the forms of5
for the explanation of5
good effects of crossing5
in the twelfth chapter5
have no reason to5
that they may be4
the production of new4
in the next generation4
in porto santo than4
to the effects of4
it is necessary to4
of male plumage by4
evidence of this in4
to which the name4
the character in question4
and varieties of the4
in a certain sense4
all that can be4
on any ordinary view4
as compared with the4
members of the family4
selection practised by the4
that of the other4
the occurrence of the4
in some of its4
on the pigs of4
it is most difficult4
the phenomena of variation4
summits of the loftiest4
on the right and4
the problem of species4
the results of the4
and it is clear4
which would seem to4
and colour of the4
on the same stigma4
of the same or4
the union of the4
varieties of the gooseberry4
i have seen a4
the condition of the4
are descended from a4
was the opinion of4
there must have been4
some change in the4
fertilised by its own4
the causes and laws4
the most liable to4
by means of the4
than that of the4
and i believe it4
the north of england4
what would be the4
so that if the4
of the fact that4
shape of each fragment4
that the development of4
a curious case of4
not so much as4
in the old surrey4
does not appear to4
can hardly be a4
and thus it is4
vast proportion of the4
in the philippine islands4
varieties of the vine4
a state of things4
to be seen in4
many varieties of the4
on the hind wing4
and visible in one4
which our domestic productions4
such a series of4
the forms of life4
which they are exposed4
the external conditions of4
in the organs of4
have reason to believe4
in which the term4
respect to the axis4
that gemmules derived from4
of colour in horses4
is liable to be4
far from improbable that4
the accumulative action of4
one and the same4
by segments in the4
which i have been4
similar facts could be4
latent in the other4
as may be seen4
to a much greater4
that it might be4
amount of modification which4
during the lifetime of4
for in this case4
we shall hereafter see4
during an early period4
each other and with4
different from that which4
unit throughout the body4
the variability of multiple4
taken from a distinct4
with the amount of4
to the members of4
to be capable of4
but they are not4
the hind feet of4
new conditions of life4
of double flowers and4
of the polish fowl4
i believe to be4
from the same species4
the great amount of4
the males and females4
different from each other4
other varieties of the4
the fauna of the4
of conditions of life4
to the conditions of4
can hardly be considered4
and of the soil4
is the same as4
to the reappearance of4
the power of transmission4
way connected with the4
on the subject of4
the three preceding chapters4
a great difference in4
in the size of4
tendency to vary in4
same character being present4
children of the same4
to think that the4
that it is difficult4
it can be shown4
sense in which the4
of the two types4
parts of south america4
the belief that the4
and the other half4
a cross with a4
when species are crossed4
from the crossing of4
the same state as4
were found to be4
forms of the same4
most valued by man4
the rate of absorption4
species which have been4
in the jardin des4
about the same age4
of the three preceding4
change in their conditions4
at an earlier age4
from zygote of form4
that good is derived4
how is it possible4
a native of the4
and others which are4
left sides of the4
variability of our domesticated4
cats with blue eyes4
the outside of the4
the breeding of the4
at a corresponding age4
the sexual elements of4
in the fifteenth chapter4
there seems to be4
of the fowl in4
side of the head4
of breeds of sheep4
through the action of4
to be found in4
in harmony with the4
in a slight degree4
one or both of4
the value of the4
it appears to me4
nature of the country4
opposed to the belief4
others of the same4
of the phenomena of4
one of the parents4
with pollen taken from4
can be propagated by4
in most cases the4
modification of old races4
by the presence of4
a form of h4
and which has been4
that they have not4
we are told that4
external conditions of life4
between varieties and species4
variation of homologous parts4
from some unknown cause4
appear to have been4
to be accounted for4
from the seed of4
early part of this4
or the other of4
one part and the4
yielded seed in the4
fertilised by pollen taken4
contour of the insect4
excessive development of the4
would be easy to4
the control of the4
through natural selection of4
have been modified by4
natural species of the4
whilst at the same4
varieties of the melon4
character being present and4
that the power of4
or in other words4
that they cannot be4
tendency to reversion in4
dureau de la malle4
be borne in mind4
tend to vary in4
eliminates the tendency to4
shown to be a4
in the following pages4
very early period of4
of the evil effects4
morbid tendencies common to4
blood in his veins4
we may believe that4
other side of the4
on a winged state4
six or seven generations4
of the development of4
those of the wild4
the repair of injuries4
from which they are4
white and yellow varieties4
as if they had4
for a long time4
were intermediate in character4
axis of the plant4
far as i am4
has led to the4
not been able to4
distinct races are not4
body in the same4
to do with the4
members of the organic4
may no doubt be4
young at a birth4
an example in which4
for the same reason4
it is practically certain4
on the assumption of4
of the distribution of4
varieties of the pear4
in a marked manner4
the increased or decreased4
all the members of4
the organs of vegetation4
fusion of homologous parts4
is only in the4
that the fact of4
acted on by the4
be found in the4
of laeta and velutina4
is possible that the4
correlated variation of homologous4
on this subject in4
which appear to be4
that he has seen4
of the forms of4
derived from the same4
the colour of their4
in proportion as the4
is not to be4
and in one instance4
to the appearance of4
the several breeds of4
from the cape of4
as i have done4
in the seventeenth chapter4
be the result of4
i have endeavoured to4
good derived from slight4
on the horses of4
in a dormant state4
of the feet in4
as to the genetic4
the male or female4
the shortening of the4
it is useless to4
appearance with advancing age4
on the principle of4
the part of the4
nothing can be more4
and we have seen4
origin and varieties of4
by one sex alone4
is perhaps the most4
than in the parent4
of the same sub4
either normally or abnormally4
a host of other4
it has been with4
one variety of the4
characters proper to the4
a consequence of this4
not proper to the4
form of the body4
some of the lower4
in feral animals and4
it is that we4
number of eggs of4
the assumption of a4
effects of food on4
the effects of a4
the first generation are4
the mode of reproduction4
of two or three4
some of the best4
or at any rate4
remarks on this head4
such is not the4
from the same seed4
tissues of the mother4
of seasonal conditions on4
on the left side4
of the several species4
the diminution of the4
the flowers on the4
what can be more4
that the study of4
the dogs of the4
its introduction into madeira4
of a first cross4
the body in the4
in several of the4
every one must have4
that in spite of4
hardly be a doubt4
a vast proportion of4
on the members of4
case of neuter insects4
the action of some4
physiological point of view4
we have previously seen4
i do not doubt4
which in the normal4
which seems to be4
to prove that the4
sterility from changed conditions4
are at the same4
the same side of4
we find that the4
one of the parent4
in the germ by4
there must be an4
latent tendency to become4
the islands of the4
so it is in4
rocks of the salvages4
through the law of4
of the most important4
the formation of the4
a winged state of4
they may have been4
the case of some4
it is necessary that4
extinction in porto santo4
it will be seen4
has bred several times4
to the absence of4
the same character being4
of domestication on fertility4
in some parts of4
to the same thing4
the assumption that the4
and on the evil4
the same as that4
the exception of the4
the two sets of4
to the north of4
that of the two4
it is hardly possible4
of the economy of4
and i have seen4
with the same result4
number of eggs in4
sides of the same4
have been assured by4
given on the authority4
must be regarded as4
conditions under which they4
as it may be4
that they do not4
in one sex than4
the wings of the4
pollen of the same4
it may be well4
close interbreeding may be4
by the male element4
the distinctions between them4
fertilised by pollen from4
the violence of the4
in a part of4
the time of the4
races of the pig4
in consequence of this4
by tubers in the4
used as the father4
be propagated by seed4
on the right side4
of the results of4
in connection with the4
when we hear that4
the several species of4
in the second place4
of the selection of4
the evil effects from4
various breeds of the4
i will not venture4
have but little doubt4
the land of passage4
all the varieties of4
during a long succession4
the same nature as4
breeds of cattle and4
communicated to me by4
been observed with plants4
of the wild boar4
as i am aware4
it appeared to me4
as we shall immediately4
the processes of division4
wear and tear of4
all organic beings occasionally4
in some cases to4
one of the higher4
absorption of the minority4
such cases may be4
only at long intervals4
according to the doctrine4
weight of the wing4
that the appearance of4
a great range of4
i have ventured to4
so much as a4
known to be the4
to nearly the same4
no doubt that the4
me that he believes4
the former of these4
would in all probability4
they are liable to4
in consequence of the4
in most of these4
on the leaves of4
to the male sex4
if such be the4
must be taken to4
to the doctrine of4
it is found that4
it may well be4
specific centres of creation4
cells of the same4
which the members of4
and vigour of the4
this view of the4
that animals and plants4
by pollen from a4
as was shown in4
point of view the4
support of this view4
many animals and plants4
the cultivation of the4
the colours of the4
is far from being4
races of animals and4
when both parents are4
an important bearing on4
the subject of the4
seeds in the capsule4
with each other and4
same manner as the4
the peach and nectarine4
to return to the4
of the northern type4
a direct cause of4
of a series of4
in the present chapter4
in many cases the4
may add that mr4
which have run wild4
we should remember that4
the yellow variety of4
of the elements or4
may be attributed to4
cross with a distinct4
is not easy to4
size of the feet4
due to the development4
cases have been observed4
on the sterility of4
be brought about by4
a great part of4
here we have a4
in all ordinary cases4
augmentation of morbid tendencies4
from the direct action4
be acted on by4
the facts of variation4
the distinctions between these4
has remarked to me4
the degree to which4
the spread of the4
cultivation of the wild4
causes and laws of4
refer the reader to4
crossed with any other4
is a consequence of4
inherited at a corresponding4
is said to be4
to believe that this4
of gemmules derived from4
with their own kind4
intercrossing of species of4
base of the beak4
under surface of the4
it is impossible not4
it is in madeira4
that a large number4
orifice of the nostrils4
nearly all the individuals4
on the theory of4
in a latent state4
cases given in the4
brought about by the4
or indirectly through the4
the red of the4
of such a nature4
the powers of flight4
a series of experiments4
on the under surface4
several varieties of the4
fertility between crossed species4
to the same general4
greatest amount of difference4
animal and vegetable kingdoms4
in some degree sterile4
have been selected for4
it is possible to4
the minority in crossed4
by the conditions to4
present and visible in4
of seeds in the4
affinity for each other4
principle of inheritance at4
same side of the4
in the following cases4
action of external conditions4
seems to me to4
i have but little4
but this is a4
in connexion with the4
varieties of the cabbage4
to a great extent4
more or less rudimentary4
exposed to the same4
it is a law4
the transmission of the4
do not know the4
call attention to the4
the principle of reversion4
or constitution of the4
the leaves of the4
in its native country4
borne in mind that4
of the body and4
the nature of their4
of one or two4
have been subjected to4
of the whole body4
factors of organic evolution4
fixed and variable species4
the increased size and4
as affecting domestic productions4
offspring of the same4
is all the more4
in reference to the4
proper to the parent4
statements are taken from4
as we can see4
of the wild species4
in the wild state4
the modification of old4
in the british museum4
so that we have4
distinct plant of the4
did not produce a4
of many of the4
seed in the proportion4
direct cause of reversion4
on varieties of the4
selection of dogs by4
the male element of4
in the theory of4
the secondary sexual characters4
the authority of mr4
when crossed with a4
states that he has4
of the other species4
that the useful variations4
i believe it to4
of the weeping ash4
as the period of4
derived from slight changes4
elements of the same4
if it could be4
we have reason to4
the conception of species4
at least in the4
in the same localities4
in the inheritance of4
is the result of4
weight of the skeleton4
one from the other4
the varieties of wheat4
gone so far as4
there is no good4
in an eminent degree4
as an illustration of4
shortening of the sternum4
in such cases the4
in the flowers of4
length of the intestines4
between crossed species and4
cases are given by4
the conclusion that the4
the same species of4
botanic gardens of edinburgh4
the imagination of the4
the two species are4
as that of a4
the direct effect of4
is said not to4
and especially in the4
must conclude that the4
its extinction in porto4
on the fact that4
the variations of the4
that it cannot be4
apex of the fore4
of the sternum is4
an instance of the4
tendency to reversion to4
in the processes of4
adapt themselves to the4
male and female side4
we can see that4
the principle of compensation4
as we shall hereafter4
in most of the4
of the hind wings4
in part due to4
tendencies common to both4
in the difference between4
elements of the body4
of the amount of4
white cats with blue4
many times in the4
relations of the two4
influence of domestication on4
i am indebted to4
of two or more4
there has been no4
of the minority in4
are due to the4
believe that it is4
we shall find that4
doctrine of specific centres4
slight change in the4
hardly be considered as4
and it would be4
differences confined to the4
is said that the4
it is not the4
may be considered as4
that he believes that4
american varieties of the4
it must not be4
the hotter parts of4
i shall attempt to4
in the same locality4
one sex than the4
of the first generation4
in our domestic animals4
but i have never4
of various parts of4
am not aware that4
crosses between the same4
under the control of4
colour of the hair4
every one knows that4
in the study of4
seeding of ordinarily seedless4
on the path of4
the order of development4
of them may be4
than is usual in4
of an unusual degree4
in the third chapter4
is impossible not to4
from what we see4
such be the case4
is impossible to read4
of action of the4
to divergence of character4
the peculiarities of the4
the breeds of the4
as soon as it4
have been able to4
and latent in the4
outward aspect of the4
assumption of male plumage4
variations are always present4
colour of the skin4
the question of the4
the cells of the4
we see in the4
the same two species4
with which we are4
can hardly suppose that4
in mind that the4
the sterility of crossed4
of the central mass4
analogous facts could be4
with the development of4
in the midst of4
or units of the4
to the origin of4
of the wild duck4
tendency to reversion is4
the members of a4
we have to deal4
or nearly all the4
be shown to be4
the organisation or constitution4
or disuse of parts4
of gestation in the4
the effects of changed4
in animals and plants4
the use or disuse4
by a process of4
rest of the body4
on the importance of4
in their natural state4
there can hardly be4
the domesticated races of4
a cross between a4
to characters derived from4
be attributed to reversion4
and one of the4
fuchsia coccinea and fulgens4
sex than the other4
increased use and disuse4
it may be added4
the concourse of the4
or it may be4
it far from improbable4
animals of the same4
the poison of a4
have shown in a4
is practically certain that4
in the strictest sense4
and the power of4
are found to be4
the authority of dr4
part of this chapter4
an account of the4
of a definitely directed4
being present and visible4
of wild and tame4
of the fore wings4
nearly the same conditions4
on the principle that4
correlated with constitutional peculiarities4
by the direct action4
from the same flower4
to be acted upon4
given in the eleventh4
in the process of4
do not doubt that4
is shown by the4
the increased use and4
the theory of evolution4
the white and yellow4
in a general sense4
i see no reason4
case is that of4
in a high degree4
that we have no4
the head of a4
the same way as4
in the university of4
the hare and rabbit4
in the same state4
it is a general4
the circumstances and conditions4
the first step in4
the amount of modification4
the forms of the4
a doubt that the4
that the amount of4
individual of the same4
the orifice of the4
in the way of4
must be looked at4
on the belief that4
the first and second4
with either pure parent4
in the preceding pages4
the botanic gardens of4
is the cause of4
than those on the4
of the transmission of4
between the same two4
of dogs by the4
pollen taken from the4
the wing and tail4
of varieties of peas4
mere heat and cold4
on the culture of4
it would be easy4
it must be conceded3
of the horse and3
it would be tedious3
the foot of the3
the tendency in the3
of the old world3
a change of this3
the peloric flowers of3
the head and limbs3
conditions of life are3
the rocks of the3
there is no such3
exposed during several generations3
the lifetime of the3
which have been kept3
to an extreme degree3
organisation or constitution of3
it may be argued3
should be borne in3
for it is impossible3
and disuse are inherited3
and in some instances3
any one of the3
the characters borne by3
the power to form3
prolonged during many generations3
the sterility of species3
which is to be3
a greater number of3
that the two lots3
the mouth of the3
it is with numerous3
ovules and pollen of3
no means impossible that3
of the most varied3
been observed in the3
given me by mr3
that there are many3
with the normal form3
all these cases the3
it seems to be3
consistent with the view3
or only on the3
pollen from the same3
far greater number of3
of the same blood3
the other hand the3
i am not mistaken3
it has also been3
selection of the best3
of the species of3
multiple and homologous parts3
by inosculation in the3
in the sixth chapter3
the same time so3
due to reversion to3
the law of the3
by way of illustration3
i saw in the3
of the soil on3
chapter it was shown3
the northern parts of3
of the personal structure3
should be confined to3
the development of certain3
with many kinds of3
as we see with3
cultivation of native plants3
the fact of its3
elements or units of3
the skin of a3
from each other by3
of feral horses in3
on the production of3
a good instance of3
to be discussed in3
the result of an3
races of the dog3
if it were possible3
that the changes in3
on the accumulative action3
the process of division3
been formed by the3
kept by the indians3
by pollen of the3
as showing how the3
than is the case3
it may be a3
the absence of any3
have been modified in3
do not know how3
from each other and3
in which the characters3
from that of the3
is at any rate3
have an important bearing3
as we do not3
on changes in the3
meeting of complementary factors3
according to the circumstances3
are a few of3
to any change in3
changes have been effected3
have an opportunity of3
be fertilised by pollen3
form of the comb3
bear in mind how3
the period of maturity3
more than a century3
two pairs of factors3
i have seen no3
of the varieties which3
two or more closely3
is little doubt that3
the several forms of3
had been cut off3
improved races of the3
for the loan of3
in the womb or3
characters of all kinds3
to me probable that3
the very existence of3
in the ordinary sense3
even in the case3
which is acted on3
a very large number3
is highly probable that3
which are propagated by3
be formed by the3
would be an advantage3
in proportion as they3
has given me the3
we can only say3
for their own wants3
are apt to be3
of the kind of3
animals to breed in3
may be suspected that3
will tend to be3
of the yellow variety3
lie on the path3
the formation of domestic3
in the amount of3
in madeira than in3
it may be suspected3
secondary sexual characters in3
will be considered in3
on the head of3
from the fact of3
on the use of3
with advancing age of3
would appear to have3
explanation of this fact3
affinities of the tissues3
the most important of3
of the causes of3
the selection of seed3
slight deviations of structure3
from improbable that the3
of the flowers of3
plants from changed conditions3
normally or abnormally are3
nature of the connexion3
will not venture to3
the precise cause of3
structure of the eye3
and the formation of3
explanation of the phenomena3
the reproductive organs being3
are the most liable3
might be argued that3
to judge how far3
distinctions between them are3
domestication of bos longifrons3
animals kept by savages3
constitution of the being3
power of the organisation3
those which have been3
on the amount of3
of the british islands3
from their first production3
and in a lesser3
of the inherited effects3
it would be well3
outward conditions of life3
occur in the same3
that the distinction is3
produced three calves which3
there is little doubt3
the corresponding parts of3
of species of verbascum3
of the utility of3
an animal or plant3
are not here concerned3
of the union of3
to the direct action3
may infer that the3
effect of conditions of3
come into existence by3
on the fact of3
as well as to3
an extent as to3
the cumulative inheritance of3
on the ground of3
to point out the3
between the common and3
the crossed offspring of3
of eggs laid by3
land of passage was3
what is the nature3
of the lower incisors3
of the animal kingdom3
and this shows that3
to the extent which3
as to lead to3
was in any way3
some reason to believe3
breeds of sheep to3
seen in the last3
at which we have3
chapters on the pigeon3
by changed conditions of3
as correlated with constitutional3
no such thing as3
that the conditions of3
of the blood of3
hence we may conclude3
adapted to the surrounding3
parent in another part3
far as to maintain3
living a free life3
such thing as a3
spur of a cock3
those who have studied3
on the same day3
those species which have3
fertilised by the gemmules3
periosteum of a dog3
the increased fertility of3
supernumerary digits in man3
the formation of our3
or abnormally are self3
on the good derived3
may be in reality3
of the several forms3
that if we could3
of natural or artificial3
accumulation through natural selection3
of transmission in crossing3
in the first chapter3
which we have just3
the geographical distribution of3
grandparents or more remote3
tuft of feathers on3
that the distribution of3
the species belonging to3
the same species in3
i have been led3
part of the offspring3
in a lesser degree3
early cultivation of the3
and in the same3
thuja pendula or filiformis3
injury to the embryo3
on their part to3
be effected by the3
which is the most3
of the definite action3
or not at all3
and disuse on the3
each other by some3
on the ground that3
whilst living under their3
i may mention that3
and exposure to a3
parents have been exposed3
be considered as a3
crossed with one of3
by prepotency of transmission3
influences to which they3
i am by no3
found to consist of3
tendency in man to3
this stage of growth3
more or less resemble3
the former of which3
that portion of the3
the most familiar examples3
as a return to3
not be forgotten that3
the influence of domestication3
as is that of3
are derived from the3
reference to the development3
we may feel sure3
i hear from dr3
as well as with3
supernumerary digits after amputation3
and the inheritance of3
in an intermediate condition3
a small portion of3
of improving the breed3
seeds as food in3
more than in the3
of selection in enlarging3
so as to become3
have been published by3
in any given case3
of the highest importance3
hybrid produced by inosculation3
on the upper surface3
of the shape of3
or both from a3
of summer and winter3
nothing to do with3
to an arrest of3
on the same subject3
two outer toes are3
varieties of the cherry3
become more and more3
on the legs of3
if they had been3
of a more adaptive3
the age of the3
by stripes and blotches3
and the other parent3
there is some reason3
of youatt on the3
and tear of the3
soon as it is3
aid of a factor3
transmitted from generation to3
origin of the peach3
it is much more3
in a large number3
and many of the3
the back of the3
the following case is3
that natural selection has3
the organs of reproduction3
will be seen that3
times in the same3
flowers of both forms3
am by no means3
on the skull in3
the culture of the3
a few red feathers3
a certain extent understand3
from these facts we3
characters not proper to3
the influence of external3
of the facts of3
origin of varieties of3
the old and new3
goes so far as3
may well be supposed3
of the orange in3
theory of natural selection3
of the japanese cock3
is true that the3
distinguished from each other3
seems at first sight3
the feathers of the3
directly or indirectly caused3
the nervous system in3
of the same age3
it would seem to3
eggs of the fowl3
hereditary affections of the3
through the medium of3
variation in the vine3
in our domestic races3
which may be called3
exception to the rule3
under a physiological point3
a much more important3
youatt on the pig3
the alleged inheritance of3
i have never heard3
created expressly for itself3
analogous or parallel varieties3
the selection of individuals3
is consistent with the3
of the same class3
or any other cause3
effects of selection in3
to have been a3
head and the extremities3
the appearance of any3
male upon the subsequent3
selection is that which3
flowers and seedless fruit3
instances have been given3
a theory of evolution3
at the college of3
the course of their3
considerations opposed to the3
the peculiarity in question3
it will be shown3
all ordinary cases of3
in the organic world3
races are not formed3
animals and plants has3
in a somewhat similar3