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 4
... then see how Natural Selection almost in- evitably causes much Extinction of the less improved forms of life , and leads to what I have called Divergence of Character . In the next chapter I shall discuss 4 ON THE ORIGIN OF SPECIES.
... then see how Natural Selection almost in- evitably causes much Extinction of the less improved forms of life , and leads to what I have called Divergence of Character . In the next chapter I shall discuss 4 ON THE ORIGIN OF SPECIES.
Page 26
... improved them astonishingly . ' About this same period the Dutch were as eager about pigeons as were the old Romans . The paramount importance of these considerations in explaining the immense amount of variation which pigeons have ...
... improved them astonishingly . ' About this same period the Dutch were as eager about pigeons as were the old Romans . The paramount importance of these considerations in explaining the immense amount of variation which pigeons have ...
Page 30
... improvements ; if he wants any of these qualities , he will assuredly fail . Few would readily believe in the natural capacity and years of practice requisite to be- come even a skilful pigeon - fancier . The same principles are ...
... improvements ; if he wants any of these qualities , he will assuredly fail . Few would readily believe in the natural capacity and years of practice requisite to be- come even a skilful pigeon - fancier . The same principles are ...
Page 32
... improved . There is reason to believe that King Charles's spaniel has been unconsciously modified to a large extent since the time of that monarch . Some highly competent authorities are convinced that the setter is directly derived ...
... improved . There is reason to believe that King Charles's spaniel has been unconsciously modified to a large extent since the time of that monarch . Some highly competent authorities are convinced that the setter is directly derived ...
Page 35
... improved by continued selection up to a standard of perfection comparable with that given to the plants in countries anciently civilised . In regard to the domestic animals kept by uncivilised man , it should not be overlooked that they ...
... improved by continued selection up to a standard of perfection comparable with that given to the plants in countries anciently civilised . In regard to the domestic animals kept by uncivilised man , it should not be overlooked that they ...
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Common terms and phrases
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