The Whence and the Whither of Man: A Brief History of His Origin and Development Through Conformity to Environment; Being the Morse Lectures of 1895C. Scribner's son, 1896 - 312 pagine |
Dall'interno del libro
Risultati 1-5 di 53
Pagina 5
... structure to all the rest , shortens . The cells and tis- sues which in other twigs turn into green leaves here become the petals and other organs of the rose or violet . Let us suppose for a moment that every rose and violet required a ...
... structure to all the rest , shortens . The cells and tis- sues which in other twigs turn into green leaves here become the petals and other organs of the rose or violet . Let us suppose for a moment that every rose and violet required a ...
Pagina 20
... structure . We do not hesitate to call it a mammal . The whale makes us more trouble ; it certainly looks remarkably like a fish . But the fin of its tail is hori- zontal , not vertical . Its front flippers differ altogether from the ...
... structure . We do not hesitate to call it a mammal . The whale makes us more trouble ; it certainly looks remarkably like a fish . But the fin of its tail is hori- zontal , not vertical . Its front flippers differ altogether from the ...
Pagina 21
... structure and grade of organization . But this radiate structure proved again to be largely a matter of adaptation . Practically all animals having a heavy calcareous shell were grouped with the snails and oysters as mol- lusks . But ...
... structure and grade of organization . But this radiate structure proved again to be largely a matter of adaptation . Practically all animals having a heavy calcareous shell were grouped with the snails and oysters as mol- lusks . But ...
Pagina 22
... structure , while the higher reptiles closely approached birds . Then it was noticed that our common fish formed a fairly well - defined group , but that the ganoids , including the sturgeons , gar - pikes , and some others , had at ...
... structure , while the higher reptiles closely approached birds . Then it was noticed that our common fish formed a fairly well - defined group , but that the ganoids , including the sturgeons , gar - pikes , and some others , had at ...
Pagina 23
... structure , which are permanent in lower and older members of the same group . You remember that the fin on the tail of a fish is as a rule bilobed . Now the backbone of a perch or cod ends at a point in the end of the tail opposite the ...
... structure , which are permanent in lower and older members of the same group . You remember that the fin on the tail of a fish is as a rule bilobed . Now the backbone of a perch or cod ends at a point in the end of the tail opposite the ...
Altre edizioni - Visualizza tutto
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1896 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1897 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1899 |
Parole e frasi comuni
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