Darwiniana: EssaysD. Appleton, 1897 - 475페이지 |
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3 페이지
... result of his own observa- tions and experiments that many hybrids are quite as fertile as the parent species , but he goes so far as to assert that the particular plant Crinum capense is much more fertile when crossed by a distinct ...
... result of his own observa- tions and experiments that many hybrids are quite as fertile as the parent species , but he goes so far as to assert that the particular plant Crinum capense is much more fertile when crossed by a distinct ...
9 페이지
... result of vast successive catastrophes , destructions , and re - creations en masse ; but catastrophes are now almost eliminated from geological , or at least palæontological speculation ; and it is admitted , on all hands , that the ...
... result of vast successive catastrophes , destructions , and re - creations en masse ; but catastrophes are now almost eliminated from geological , or at least palæontological speculation ; and it is admitted , on all hands , that the ...
11 페이지
... the operation of the second . Place an animal in new circumstances , says he , and its needs will be altered ; the new needs will create new desires , and the attempt to gratify such desires will result in an I 11 THE DARWINIAN HYPOTHESIS.
... the operation of the second . Place an animal in new circumstances , says he , and its needs will be altered ; the new needs will create new desires , and the attempt to gratify such desires will result in an I 11 THE DARWINIAN HYPOTHESIS.
12 페이지
Essays Thomas Henry Huxley. the attempt to gratify such desires will result in an appropriate modification of the organs exerted . Make a man a blacksmith , and his brachial muscles will develop in accordance with the demands made upon ...
Essays Thomas Henry Huxley. the attempt to gratify such desires will result in an appropriate modification of the organs exerted . Make a man a blacksmith , and his brachial muscles will develop in accordance with the demands made upon ...
15 페이지
... results of twenty years ' investigation and reflection we must listen even though we be disposed to strike . But , in reading his work , it must be confessed that the attention which might at first be dutifully , soon becomes willingly ...
... results of twenty years ' investigation and reflection we must listen even though we be disposed to strike . But , in reading his work , it must be confessed that the attention which might at first be dutifully , soon becomes willingly ...
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adapted Agamogenesis Ancon animalcules animals animals and plants appear beds biological birds body bones called carbonic acid causes character Charles Darwin common course creation cross curious Darwin Darwin's views deposited direct doctrine of evolution domestic pigeons doubt endeavour epigenesis epoch Erasmus Darwin evidence ex nihilo experiments extinct fact favour forms fossil geological germ groups horse Hyæna hypothesis ichthyosaurus inorganic world inquiry kind knowledge Lamarck lectures less living male matter means mind Mivart modification natural selection naturalists observation offspring operation organic nature organisation Origin of Species parent peculiar perpetuation phenomena physiological pigeons Pikermi Pouter present primitive stock produced Quarterly Reviewer question races reason remarkable result Rock Pigeon scientific selective breeding sense sheep skeleton sort speculations spontaneous structure Suarez substance suppose Teleology tendency theory thing tion toes variation varieties vary vegetable whole