The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
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Page 16
... parent . I believe this rule to be of the highest importance in explaining the laws of embryology . These remarks are of course con- fined to the first appearance of the peculiarity , and not to the primary cause which may have acted on ...
... parent . I believe this rule to be of the highest importance in explaining the laws of embryology . These remarks are of course con- fined to the first appearance of the peculiarity , and not to the primary cause which may have acted on ...
Page 19
... parent species . This point , if it could be cleared up , would be interesting ; if , for instance , it could be shown that the greyhound , bloodhound , terrier , spaniel , and bull - dog , which we all know propagate their kind truly ...
... parent species . This point , if it could be cleared up , would be interesting ; if , for instance , it could be shown that the greyhound , bloodhound , terrier , spaniel , and bull - dog , which we all know propagate their kind truly ...
Page 20
... parent species of our existing domesticated productions have varied . In the case of most of our anciently domesticated animals and plants , it is not possible to come to any definite conclusion , whether they are descended from one or ...
... parent species of our existing domesticated productions have varied . In the case of most of our anciently domesticated animals and plants , it is not possible to come to any definite conclusion , whether they are descended from one or ...
Page 26
... parent - stocks possessed the characteristic enormous crop ? The supposed aboriginal stocks must . all have been rock - pigeons , that is , they did not breed or willingly perch on trees . But besides C. livia , with its geographical ...
... parent - stocks possessed the characteristic enormous crop ? The supposed aboriginal stocks must . all have been rock - pigeons , that is , they did not breed or willingly perch on trees . But besides C. livia , with its geographical ...
Page 32
... parent , as any naturalist could in coming to a similar conclusion in regard to the many species of finches , or other groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of the ...
... parent , as any naturalist could in coming to a similar conclusion in regard to the many species of finches , or other groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of the ...
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Common terms and phrases
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