Darwiniana: EssaysD. Appleton, 1897 - 475페이지 |
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3 페이지
... offspring , called hybrids , are so . It is affirmed not only that this is an experimental fact , but that it is a provision for the preservation of the purity of species . Such a criterion as this would be invaluable ; but ...
... offspring , called hybrids , are so . It is affirmed not only that this is an experimental fact , but that it is a provision for the preservation of the purity of species . Such a criterion as this would be invaluable ; but ...
16 페이지
... offspring are then carefully examined , and those which exhibit the peculiarity the most distinctly are selected for breeding ; and this operation is repeated until the desired amount of divergence from the primitive stock is reached ...
... offspring are then carefully examined , and those which exhibit the peculiarity the most distinctly are selected for breeding ; and this operation is repeated until the desired amount of divergence from the primitive stock is reached ...
18 페이지
... being better nourished than the others , but of their predominating over their fellows in other ways , and of having a better chance of leaving offspring , which will of course tend to reproduce the 18 I THE DARWINIAN HYPOTHESIS.
... being better nourished than the others , but of their predominating over their fellows in other ways , and of having a better chance of leaving offspring , which will of course tend to reproduce the 18 I THE DARWINIAN HYPOTHESIS.
19 페이지
Essays Thomas Henry Huxley. offspring , which will of course tend to reproduce the peculiarities of their parents . Their offspring will , by a parity of reasoning , tend to predominate over their contemporaries , and there being ( sup ...
Essays Thomas Henry Huxley. offspring , which will of course tend to reproduce the peculiarities of their parents . Their offspring will , by a parity of reasoning , tend to predominate over their contemporaries , and there being ( sup ...
31 페이지
... offspring into the likeness of the parent . It is the first great law of reproduction , that the offspring tends to resemble its parent or parents , more closely than anything else . Science will some day show us how this law is a ...
... offspring into the likeness of the parent . It is the first great law of reproduction , that the offspring tends to resemble its parent or parents , more closely than anything else . Science will some day show us how this law is a ...
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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