On the Origin of Species by Means of Natural Selection, Or, The Preservation of Favoured Races in the Struggle for Life |
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Page 48
... species of the large genera which present any varieties , invariably present a larger average number of varieties than do the species of the small genera . Both these results follow when another division is ... species 48 ORIGIN OF SPECIES.
... species of the large genera which present any varieties , invariably present a larger average number of varieties than do the species of the small genera . Both these results follow when another division is ... species 48 ORIGIN OF SPECIES.
Page 49
... species of the larger genera resemble varieties more than do the species of the smaller genera . Or the case may be put in another way , and it may be said that in the larger genera , in which a number of varieties or incipient species ...
... species of the larger genera resemble varieties more than do the species of the smaller genera . Or the case may be put in another way , and it may be said that in the larger genera , in which a number of varieties or incipient species ...
Page 50
... species which are very closely allied to other species , and in so far resemble varieties , often have much restricted ranges . For instance , Mr. H. C. Watson has marked for me in the well - sifted London Catalogue of plants ( 4th ...
... species which are very closely allied to other species , and in so far resemble varieties , often have much restricted ranges . For instance , Mr. H. C. Watson has marked for me in the well - sifted London Catalogue of plants ( 4th ...
Contents
VARIATION UNDER DOMESTICATION | 6 |
VARIATION UNDER NATURE | 38 |
STRUGGLE FOR EXISTENCE | 52 |
Copyright | |
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Common terms and phrases
accumulated adapted affinities allied species amount analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distant distinct species divergence domestic doubt eggs embryo endemic Europe existing exterminated extinct extremely facts favourable fertility flower formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important increase in number individuals inhabitants inherited insects instance instincts intercrossing land larvæ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally oceanic islands offspring perfect pigeons pistil plants pollen present probably produced progenitor ranked reciprocal crosses remarked resemblance seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder theory tion trees variability variations vary whole widely