id author title date pages extension mime words sentences flesch summary cache txt 54612 Spencer, Herbert The Principles of Biology, Volume 1 (of 2) .txt text/plain 245817 10358 54 produce changes of molecular arrangement in organic matter. A certain general trait of animal organization may fitly be named distinguishes the changes taking place in an organism during life from The facts of structure shown in an individual organism, are of two The structural changes which any series of individual organisms exhibits, which the force generated in organisms by chemical change, is transformed structures in individual organisms, come the facts showing that functions, and presently unite to form certain parts of the growing structures. together, form the different organs: we have to observe the general and certain general truths displayed by animal organization at large. germ-cells, in some cases arising in different organs set apart for their causes by which organic forms are changed. occurrence in other organic forms, of changes great enough to produce what different parts are exposed, every individual organic aggregate, like all ./cache/54612.txt ./txt/54612.txt