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 9
... slight changes , such as size from the amount of food , colour from the nature of the food , thickness of the skin and hair from climate , & c . Each of the endless variations which we see in the plumage of our fowls must have had some ...
... slight changes , such as size from the amount of food , colour from the nature of the food , thickness of the skin and hair from climate , & c . Each of the endless variations which we see in the plumage of our fowls must have had some ...
Page 10
... slight changes in the surrounding conditions . Nothing is more easy than to tame an animal , and few things more difficult than to get it to breed freely under confine- ment , even when the male and female unite . How many animals there ...
... slight changes in the surrounding conditions . Nothing is more easy than to tame an animal , and few things more difficult than to get it to breed freely under confine- ment , even when the male and female unite . How many animals there ...
Page 14
... slight degree from that of the parental type . Any variation which is not inherited is unimportant for us . But the number and diversity of inheritable deviations of structure , both those of slight and those of considerable ...
... slight degree from that of the parental type . Any variation which is not inherited is unimportant for us . But the number and diversity of inheritable deviations of structure , both those of slight and those of considerable ...
Page 22
... slight , has had its wild prototype . At this rate there must have existed at least a score of species of wild cattle , as many sheep , and several goats , in Europe alone , and several even within Great Britain . One author believes ...
... slight , has had its wild prototype . At this rate there must have existed at least a score of species of wild cattle , as many sheep , and several goats , in Europe alone , and several even within Great Britain . One author believes ...
Page 33
... slight differences , yet they ignore all general arguments , and refuse to sum up in their minds slight differences accumulated during many successive generations . May not those naturalists who , knowing far less of the laws of ...
... slight differences , yet they ignore all general arguments , and refuse to sum up in their minds slight differences accumulated during many successive generations . May not those naturalists who , knowing far less of the laws of ...
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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 lamellę larvę 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