On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1860 - 502페이지 This is the 'second edition' of Darwin's Origin of Species. |
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viii 페이지
... single species On Extinction On simultaneous changes in the forms of life throughout the world - On the affinities of extinct species to each other and to living species- On the state of development of ancient forms On the succession of ...
... single species On Extinction On simultaneous changes in the forms of life throughout the world - On the affinities of extinct species to each other and to living species- On the state of development of ancient forms On the succession of ...
2 페이지
... single point is discussed in this volume on which facts cannot be adduced , often apparently leading to conclusions directly opposite to those at which I have arrived . A fair result can be obtained only by fully stating and balancing ...
... single point is discussed in this volume on which facts cannot be adduced , often apparently leading to conclusions directly opposite to those at which I have arrived . A fair result can be obtained only by fully stating and balancing ...
9 페이지
... this term gardeners mean a single bud or offset , which suddenly assumes a new and sometimes very different character from that of the rest of the plant . Such buds can be propagated by grafting , & c B 3 CHAP . I. 9 UNDER DOMESTICATION .
... this term gardeners mean a single bud or offset , which suddenly assumes a new and sometimes very different character from that of the rest of the plant . Such buds can be propagated by grafting , & c B 3 CHAP . I. 9 UNDER DOMESTICATION .
11 페이지
... single domestic animal can be named which has not in some country drooping ears ; and the view suggested by some authors , that the drooping is due to the disuse of the muscles of the ear , from the animals not being much alarmed by ...
... single domestic animal can be named which has not in some country drooping ears ; and the view suggested by some authors , that the drooping is due to the disuse of the muscles of the ear , from the animals not being much alarmed by ...
14 페이지
... intercrossing , that only a single variety should be turned loose in its new home . Nevertheless , as our varieties certainly do occasionally revert in some of their characters to ancestral forms , 14 CHAP . I. VARIATION.
... intercrossing , that only a single variety should be turned loose in its new home . Nevertheless , as our varieties certainly do occasionally revert in some of their characters to ancestral forms , 14 CHAP . I. VARIATION.
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accumulated adapted affinities allied species America amount analogous ancient animals appear become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo Europe existing exterminated extinct extremely facts favourable Fcap fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons plants pollen present probably produced progenitor racters ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely