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 vii
7 tion - Means of transition - Cases of difficulty- . Natura non facit saltum - Organs of small importance - Organs not in all cases absolutely perfect - The law of unity of type and of the conditions of existence embraced by the theory ...
7 tion - Means of transition - Cases of difficulty- . Natura non facit saltum - Organs of small importance - Organs not in all cases absolutely perfect - The law of unity of type and of the conditions of existence embraced by the theory ...
Page 130
... means applies to any part , however unusually developed , unless it be unusually developed in comparison with the same part in closely allied species . Thus , the bat's wing is a most abnormal structure in the class mammalia ; but the ...
... means applies to any part , however unusually developed , unless it be unusually developed in comparison with the same part in closely allied species . Thus , the bat's wing is a most abnormal structure in the class mammalia ; but the ...
Page 302
... mean : our English racehorses differ slightly from the horses of every other breed ; but they do not owe their difference ... Means of Dispersal . - Sir C. Lyell and other authors have ably treated this subject . I can give here only the ...
... mean : our English racehorses differ slightly from the horses of every other breed ; but they do not owe their difference ... Means of Dispersal . - Sir C. Lyell and other authors have ably treated this subject . I can give here only the ...
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