The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for LifeD. Appleton, 1904 - 435페이지 |
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xv 페이지
... instance , cattle got their horns , and not for what they are used . It is rather a singular instance of the manner in which similar views arise at about the same time , that Goethe in Germany , Dr. Darwin in England , and Geoffroy ...
... instance , cattle got their horns , and not for what they are used . It is rather a singular instance of the manner in which similar views arise at about the same time , that Goethe in Germany , Dr. Darwin in England , and Geoffroy ...
xix 페이지
... instance , a woodpecker has become 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 ...
... instance , a woodpecker has become 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 ...
3 페이지
... instance , of the woodpecker , with its feet , tail , beak , and tongue , so admirably 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 ...
... instance , of the woodpecker , with its feet , tail , beak , and tongue , so admirably 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 ...
11 페이지
... instances ) , yet having their re- productive system so seriously affected by unperceived causes as to fail to act , we ... instance , rabbits and ferrets kept in hutches ) , showing that their reproductive organs are not easily affected ...
... instances ) , yet having their re- productive system so seriously affected by unperceived causes as to fail to act , we ... instance , rabbits and ferrets kept in hutches ) , showing that their reproductive organs are not easily affected ...
13 페이지
... instance of the effects of use . Not one of our domestic animals can be named which has not in some country drooping ... instances are given in Isidore Geoffroy St. Hilaire's great work on this subject . Breeders believe that long limbs ...
... instance of the effects of use . Not one of our domestic animals can be named which has not in some country drooping ... instances are given in Isidore Geoffroy St. Hilaire's great work on this subject . Breeders believe that long limbs ...
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adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period 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 males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young