The Whence and the Whither of Man: A Brief History of His Origin and Development Through Conformity to Environment; Being the Morse Lectures of 1895 |
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Page xii
... locomotion and locomotion before thought . And it is hardly less than a physiological necessity that it should be so . The plant can and does exist , living almost purely for digestion and reproduction , and the same is true of the ...
... locomotion and locomotion before thought . And it is hardly less than a physiological necessity that it should be so . The plant can and does exist , living almost purely for digestion and reproduction , and the same is true of the ...
Page 47
... locomotion , in larger ones the muscles are beginning to assume this function and the animal moves by writhing . The bilateral symmetry has arisen in connection with this mode of locomotion and is thus a mark of important progress . In ...
... locomotion , in larger ones the muscles are beginning to assume this function and the animal moves by writhing . The bilateral symmetry has arisen in connection with this mode of locomotion and is thus a mark of important progress . In ...
Page 59
... locomotion , had withdrawn , so to speak , from the world ; all the sense they needed was just enough to distinguish the particles of food as they swept past the mouth in the current of water . They have an abundance of food , and " wax ...
... locomotion , had withdrawn , so to speak , from the world ; all the sense they needed was just enough to distinguish the particles of food as they swept past the mouth in the current of water . They have an abundance of food , and " wax ...
Page 60
... locomotion . The high- est forms gave up the purely defensive campaign , de- veloped a powerful beak , led a life like that of the old Norse pirates , and were for a time the rulers and ter- rors of the sea . With their more rapid ...
... locomotion . The high- est forms gave up the purely defensive campaign , de- veloped a powerful beak , led a life like that of the old Norse pirates , and were for a time the rulers and ter- rors of the sea . With their more rapid ...
Page 65
... locomotion . That of the in- sect is still somewhat protective , but is mainly , almost purely , locomotive . It is never allowed to become so heavy as to interfere with locomotion . In the second place , the insect has three body ...
... locomotion . That of the in- sect is still somewhat protective , but is mainly , almost purely , locomotive . It is never allowed to become so heavy as to interfere with locomotion . In the second place , the insect has three body ...
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Common terms and phrases
advance amoeba amphibia anatomical ancestors animal kingdom annelid apes appear appetite archenteron attained become beginning better birds body brain cells cerebrum characteristics conformity to environment conscious degeneration dominant ectoderm embryo embryology entoderm experience eyes fish functions future ganglion gastrula germ-plasm give groups heredity higher animals higher forms highest human hydra important increase individual insect instinct intelligence jaws knowledge laws layer legs living locomotion lower mammals man's marsupial ment mental mind mode modified mollusks moral motives muscles muscular muscular system natural selection nephridia nerve nervous system never notochord nutriment organs oxygen parapodia perception possible primitive probably progress protoplasm protozoa purely reflex action reptiles result schematic worm segments selfish sense-organs sequence shell skeleton species spermatozoa stage structure struggle surface survive swimming theory of evolution tion tissues true truth turbellaria unselfishness variation velopment vertebral column vertebrates volvox young