The Origin of Species by Means of Natural Selection; Or, the Preservation of Favored Races in the Struggle for Life ...A.L. Burt, 1890 - 538페이지 |
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74 페이지
... Natural Selection , or the Survival of the Fittest . Variations neither useful nor injurious would not be affected by natural selection , and would be left either a fluctuating element , as perhaps we see in certain polymorphic species ...
... Natural Selection , or the Survival of the Fittest . Variations neither useful nor injurious would not be affected by natural selection , and would be left either a fluctuating element , as perhaps we see in certain polymorphic species ...
79 페이지
... natural selection , other modifica- tions , often of the most unexpected nature , will ensue . As we see that those variations which , under domesti- cation ... natural selection cannot do , is to modify the structure NATURAL SELECTION . 79.
... natural selection , other modifica- tions , often of the most unexpected nature , will ensue . As we see that those variations which , under domesti- cation ... natural selection cannot do , is to modify the structure NATURAL SELECTION . 79.
237 페이지
... natural selection from appearing to us advantageous to the species . In this case , as the struggle for life did not depend on such struct- ures , they could not have been acquired through natural selection . In many cases complex and ...
... natural selection from appearing to us advantageous to the species . In this case , as the struggle for life did not depend on such struct- ures , they could not have been acquired through natural selection . In many cases complex and ...
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