On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, Volume 2 |
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Page 31
... know , may be attributed to the definite action of the conditions of life . Some , perhaps a great , effect may be attributed to the increased use or disuse of parts . The final result CHAP . I. Circumstances favourable to Selection . 31.
... know , may be attributed to the definite action of the conditions of life . Some , perhaps a great , effect may be attributed to the increased use or disuse of parts . The final result CHAP . I. Circumstances favourable to Selection . 31.
Page 34
... favourable circumstances . They would , also , during the first and succeeding generations cross with the ordinary form , and thus their abnormal character would almost inevitably be lost . But I shall have to return in a future chapter ...
... favourable circumstances . They would , also , during the first and succeeding generations cross with the ordinary form , and thus their abnormal character would almost inevitably be lost . But I shall have to return in a future chapter ...
Page 44
... favourable for variation ; and hence we might expect that the circumstances would generally be still favourable to variation . On the other hand , if we look at each species as a special act of creation , there is no apparent reason why ...
... favourable for variation ; and hence we might expect that the circumstances would generally be still favourable to variation . On the other hand , if we look at each species as a special act of creation , there is no apparent reason why ...
Page 51
... favourable to them during two or three following seasons . Still more striking is the evidence from our domestic animals of many kinds which have run wild in several parts of the world ; if the statements of the rate of increase of slow ...
... favourable to them during two or three following seasons . Still more striking is the evidence from our domestic animals of many kinds which have run wild in several parts of the world ; if the statements of the rate of increase of slow ...
Page 52
... favourable conditions , a whole district , let it be ever so large . The condor lays a couple of eggs and the ostrich a score , and yet in the same country the condor may be the more numero of the two ; the Fulmar petrel lays but one ...
... favourable conditions , a whole district , let it be ever so large . The condor lays a couple of eggs and the ostrich a score , and yet in the same country the condor may be the more numero of the two ; the Fulmar petrel lays but one ...
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Common terms and phrases
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