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 167
... successive variations ; she can never take a leap , but must advance by the shortest and slowest steps . Organs of little apparent importance . - As natural selection acts by life and death — by the preservation of individuals with any ...
... successive variations ; she can never take a leap , but must advance by the shortest and slowest steps . Organs of little apparent importance . - As natural selection acts by life and death — by the preservation of individuals with any ...
Page 402
... successive , slight , but profitable modifications . We can thus understand why nature moves by graduated steps in endowing different animals of the same class with their several instincts . I have attempted to show how much light the ...
... successive , slight , but profitable modifications . We can thus understand why nature moves by graduated steps in endowing different animals of the same class with their several instincts . I have attempted to show how much light the ...
Page 406
... successive modifications . The similarity of pattern in the wing and leg of a bat , though used for such different purpose - in the jaws and legs of a crab - in the petals , stamens , and pistils of a flower , is likewise intelligible ...
... successive modifications . The similarity of pattern in the wing and leg of a bat , though used for such different purpose - in the jaws and legs of a crab - in the petals , stamens , and pistils of a flower , is likewise intelligible ...
Contents
INTRODUCTION | 1 |
STRUGGLE FOR EXISTENCE | 52 |
NATURAL SELECTION | 69 |
Copyright | |
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Common terms and phrases
accumulated adapted affinities allied species 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 distant distinct species divergence doubt embryo Europe existing exterminated extinct extremely facts favourable fertility flowers formation 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 occasional oceanic islands offspring Origin of Species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemblance seeds sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory tion trees variability variation vary whole widely