On the Origin of Species by Means of Natural Selection: Or The Preservation of Favoured Races in the Struggle for LifeHumphrey Milford, Oxford University Press, 1923 - 454페이지 |
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4 페이지
... inheritance , any selected variety will tend to propagate its new and modified form . This fundamental subject of Natural Selection , will be treated at some length in the fourth chapter and we shall then see how Natural Selection ...
... inheritance , any selected variety will tend to propagate its new and modified form . This fundamental subject of Natural Selection , will be treated at some length in the fourth chapter and we shall then see how Natural Selection ...
7 페이지
... Inheritance - Character of Domestic Varieties -- Difficulty of dis tinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species - Domestic Pigeons , their Differences and Origin - Principle of ...
... Inheritance - Character of Domestic Varieties -- Difficulty of dis tinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species - Domestic Pigeons , their Differences and Origin - Principle of ...
10 페이지
... inheritance ; for had the action of the conditions ' been direct , if any of the young had varied , all would probably have varied in the same manner . To judge how ... inherited development of the udders in cows 10 ON THE ORIGIN OF SPECIES.
... inheritance ; for had the action of the conditions ' been direct , if any of the young had varied , all would probably have varied in the same manner . To judge how ... inherited development of the udders in cows 10 ON THE ORIGIN OF SPECIES.
11 페이지
... inherited development of the udders in cows and goats in countries where they are habitually milked , in comparison with the state of these organs in other countries , is another instance of the effect of use . Not a single domestic ...
... inherited development of the udders in cows and goats in countries where they are habitually milked , in comparison with the state of these organs in other countries , is another instance of the effect of use . Not a single domestic ...
12 페이지
... inheritance . Every one must have heard of cases of albinism , prickly skin , hairy bodies , etc. , appearing in several members of the same family . If strange and rare deviations of structure are truly inherited , less strange and ...
... inheritance . Every one must have heard of cases of albinism , prickly skin , hairy bodies , etc. , appearing in several members of the same family . If strange and rare deviations of structure are truly inherited , less strange and ...
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accumulated adapted affinities allied species America amount analogous ancient appear Archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence doubt embryo endemic Europe existing exterminated extinct extremely facts favourable 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 land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation vary whole widely