On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, Volumen2D. Appleton, 1888 - 458 páginas |
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Página 43
... advantages that enabled their parents to become dominant over their compatriots . In these remarks on predominance , it should be understood that reference is made only to the forms which come into competition with each other , and more ...
... advantages that enabled their parents to become dominant over their compatriots . In these remarks on predominance , it should be understood that reference is made only to the forms which come into competition with each other , and more ...
Página 60
... advantage over its competitors , or over the animals which prey on it . On the confines of its geographical range , a change of constitution with respect to climate would clearly be an advantage to our plant ; but we have reason to ...
... advantage over its competitors , or over the animals which prey on it . On the confines of its geographical range , a change of constitution with respect to climate would clearly be an advantage to our plant ; but we have reason to ...
Página 61
... advantage over a different eet of competitors or enemies . It is good thus to try in imagination to give to any one species an advantage over another . Probably in no single instance should we know what to do . This ought to convince us ...
... advantage over a different eet of competitors or enemies . It is good thus to try in imagination to give to any one species an advantage over another . Probably in no single instance should we know what to do . This ought to convince us ...
Página 63
... advantage , however slight , over others , would have the best chance of surviving and of procreating their kind ? On the other hand , we may feel sure that any variation in the least degree injurious would be rigidly de- stroyed . This ...
... advantage , however slight , over others , would have the best chance of surviving and of procreating their kind ? On the other hand , we may feel sure that any variation in the least degree injurious would be rigidly de- stroyed . This ...
Página 64
... advantage over others ; and still further modifications of the same kind would often still further increase the advantage , as long as the species continued under the same conditions of life and profited by similar means of subsistence ...
... advantage over others ; and still further modifications of the same kind would often still further increase the advantage , as long as the species continued under the same conditions of life and profited by similar means of subsistence ...
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Términos y frases comunes
adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed tend theory tion variability variations varieties vary whilst whole wings young