The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for LifeP.F. Collier & son, 1902 - 356페이지 |
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11 페이지
... adapted for dividing , and the grinders flat , and serviceable for masticating the food ; since they were not made for the sake of this , but it was the result of accident . And in like manner as to the other parts in which there ...
... adapted for dividing , and the grinders flat , and serviceable for masticating the food ; since they were not made for the sake of this , but it was the result of accident . And in like manner as to the other parts in which there ...
17 페이지
... adapted to its peculiar habits of life . The work , from its powerful and brilliant style , though displaying in the earlier editions little accurate knowledge and a great want of scientific caution , immedi ately had a very wide ...
... adapted to its peculiar habits of life . The work , from its powerful and brilliant style , though displaying in the earlier editions little accurate knowledge and a great want of scientific caution , immedi ately had a very wide ...
27 페이지
... adapted to catch insects under the bark of trees . In the case of the mistletoe , which draws its nourishment from certain trees , which has seeds that must be transported by cer- tain birds , and which has flowers with separate sexes ...
... adapted to catch insects under the bark of trees . In the case of the mistletoe , which draws its nourishment from certain trees , which has seeds that must be transported by cer- tain birds , and which has flowers with separate sexes ...
100 페이지
... adapt organic beings to his own uses , through the accumulation of slight but useful variations , given to him by the hand of Nature . But Natural Selection , as we shall hereafter see , is a power incessantly ready for action , and is ...
... adapt organic beings to his own uses , through the accumulation of slight but useful variations , given to him by the hand of Nature . But Natural Selection , as we shall hereafter see , is a power incessantly ready for action , and is ...
117 페이지
... adapted for diving , allows it to compete with other aquatic insects , to hunt for its own prey , and to escape serving as prey to other animals . The store of nutriment laid up within the seeds of many plants seems at first sight to ...
... adapted for diving , allows it to compete with other aquatic insects , to hunt for its own prey , and to escape serving as prey to other animals . The store of nutriment laid up within the seeds of many plants seems at first sight to ...
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adapted admit affinities allied species America analogous ancient animals appear beak become bees believe belonging birds breeds cause cells characters climate closely allied color common continent crossed crustaceans degree developed difficulty distinct species domestic doubt eggs embryo existing extinct extremely facts favorable fertility flowers formation forms fossil Fritz Müller genera genus geological Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner marsupial migration modification modified descendants natural selection naturalists nearly nest offspring organs ORIGIN OF SPECIES paleozoic parent peculiar perfect pigeon pistil plants pollen present principle probably produced progenitor quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder theory tion trees variability variations varieties vary whole wings young