On the Origin of the Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Page vi
... considered Uniformity of certain cha- racters due to their unimportance , and to their not having been acted on by Natural Selection Indefinite multiplication of --- species Summary - - 91-164 CHAPTER V. LAWS OF VARIATION . w Acclimati ...
... considered Uniformity of certain cha- racters due to their unimportance , and to their not having been acted on by Natural Selection Indefinite multiplication of --- species Summary - - 91-164 CHAPTER V. LAWS OF VARIATION . w Acclimati ...
Page 8
... considered as definite when all or nearly all the offspring of individuals exposed to certain conditions during several generations are modi- fied in the same manner . It is extremely difficult to come to any conclusion in regard to the ...
... considered as definite when all or nearly all the offspring of individuals exposed to certain conditions during several generations are modi- fied in the same manner . It is extremely difficult to come to any conclusion in regard to the ...
Page 9
... considered as the indefinite effects of the conditions of life on each individual organism , in nearly the same manner as a chill affects different men in an inde- finite manner , according to their state of body or con- stitution ...
... considered as the indefinite effects of the conditions of life on each individual organism , in nearly the same manner as a chill affects different men in an inde- finite manner , according to their state of body or con- stitution ...
Page 38
... considered as un- consciously followed , in so far that the breeders could never have expected , or even have wished , to produce the result which ensued - namely , the production of two distinct strains . The two flocks of Leicester ...
... considered as un- consciously followed , in so far that the breeders could never have expected , or even have wished , to produce the result which ensued - namely , the production of two distinct strains . The two flocks of Leicester ...
Page 55
... considered as varieties , but which have all been ranked by botanists as species ; and in making this list he has omitted many trifling varieties , but which nevertheless have been ranked by some botanists as species , and he has ...
... considered as varieties , but which have all been ranked by botanists as species ; and in making this list he has omitted many trifling varieties , but which nevertheless have been ranked by some botanists as species , and he has ...
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Common terms and phrases
accumulated adapted affinities allied species America ancient appear Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt Edition eggs embryo existing exterminated extinct extremely facts favourable females fertilised fertility flowers formation forms fossil Fritz Müller Gärtner genera genus geological Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ less living males mammals manner migration modified descendants natural selection naturalists nearly nest occur oceanic islands offspring organisation parent perfect pigeons pistil pollen Post 8vo present principle probably produced progenitor racters ranked reciprocal crosses remarked resemble seeds sexual sexual selection Silurian slight South America stamens sterility structure struggle successive suppose theory tion variability variations varieties vary vols whole widely