The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, 1권D. Appleton, 1898 |
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46개의 결과 중 1 - 5개
vi 페이지
... relations of all animals and plants throughout nature - Struggle for life most severe between individuals and varieties of the same species : often severe between species of the same genus - The relation of organism to organism the most ...
... relations of all animals and plants throughout nature - Struggle for life most severe between individuals and varieties of the same species : often severe between species of the same genus - The relation of organism to organism the most ...
xiii 페이지
... relation in nature ? as the teeth , for example , grow by necessity , the front ones sharp , adapted for dividing , and the grinders flat , and serviceable for masticating the food ; since they were not made for the sake of this , but ...
... relation in nature ? as the teeth , for example , grow by necessity , the front ones sharp , adapted for dividing , and the grinders flat , and serviceable for masticating the food ; since they were not made for the sake of this , but ...
xxvi 페이지
... relation to that hypothesis which supposes the species living at any time to be the result of the gradual modification of pre - existing species a hypothesis which , though un- . proven , and sadly damaged by some of its supporters , is ...
... relation to that hypothesis which supposes the species living at any time to be the result of the gradual modification of pre - existing species a hypothesis which , though un- . proven , and sadly damaged by some of its supporters , is ...
1 페이지
... relations of the present to the past in- habitants of that continent . These facts , as will be seen in the latter chapters of this volume , seemed to throw some light on the origin of species - that mys- tery of mysteries , as it has ...
... relations of the present to the past in- habitants of that continent . These facts , as will be seen in the latter chapters of this volume , seemed to throw some light on the origin of species - that mys- tery of mysteries , as it has ...
3 페이지
... relations , their geographical distribution , geological succession , and other such facts , might come to the conclusion that species had not been independently created , but had descended , like varieties , from other species . Never ...
... relations , their geographical distribution , geological succession , and other such facts , might come to the conclusion that species had not been independently created , but had descended , like varieties , from other species . Never ...
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adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree descendants developed difficulty distinct species disuse divergence domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young