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
smaller genera . of the larger genera present varieties , than on the side of the Morover , the species of the large genera which present any varieties , invariably present a larger average number of varieties than do the species of the ...
smaller genera . of the larger genera present varieties , than on the side of the Morover , the species of the large genera which present any varieties , invariably present a larger average number of varieties than do the species of the ...
Page 149
... present states . Hence we ought not to expect at the present time to meet with numerous transitional varieties in each region , though they must have existed there , and may be embedded there in a fossil con- dition . But in the ...
... present states . Hence we ought not to expect at the present time to meet with numerous transitional varieties in each region , though they must have existed there , and may be embedded there in a fossil con- dition . But in the ...
Page 313
... present Alpine plants and animals of the several great European mountain- ranges , though very many of the species are identically the same , some present varieties , some are ranked as doubtful forms , and some few are distinct yet ...
... present Alpine plants and animals of the several great European mountain- ranges , though very many of the species are identically the same , some present varieties , some are ranked as doubtful forms , and some few are distinct yet ...
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