The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
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Page 33
... seeds of the same tree . In- numerable other examples could be given . The ex- planation , I think , is simple : from long - continued study they are strongly impressed with the differences between the several races ; and though they ...
... seeds of the same tree . In- numerable other examples could be given . The ex- planation , I think , is simple : from long - continued study they are strongly impressed with the differences between the several races ; and though they ...
Page 37
... seed- raisers do not pick out the best plants , but merely go over their seed - beds , and pull up the " rogues , " as they call the plants that deviate from the proper standard . With animals this kind of selection is , in fact ...
... seed- raisers do not pick out the best plants , but merely go over their seed - beds , and pull up the " rogues , " as they call the plants that deviate from the proper standard . With animals this kind of selection is , in fact ...
Page 42
... seed of a wild plant . No one would expect to raise a first - rate melting pear from the seed of the wild pear ... seeds , and , when a slightly better variety chanced to appear , selecting it , and so onwards . But the gardeners ...
... seed of a wild plant . No one would expect to raise a first - rate melting pear from the seed of the wild pear ... seeds , and , when a slightly better variety chanced to appear , selecting it , and so onwards . But the gardeners ...
Page 49
... seeds of the different varie- ties of the bean or maize probably differ more in size , than do the seeds of the distinct species in any one genus in the same two families . The same remark holds good in regard to the fruit of the ...
... seeds of the different varie- ties of the bean or maize probably differ more in size , than do the seeds of the distinct species in any one genus in the same two families . The same remark holds good in regard to the fruit of the ...
Page 50
... seed With plants which are temporarily propagated by cut- tings , buds , & c . , the importance of crossing is immense ; for the cultivator may here disregard the extreme varia- bility both of hybrids and of mongrels , and the steril ...
... seed With plants which are temporarily propagated by cut- tings , buds , & c . , the importance of crossing is immense ; for the cultivator may here disregard the extreme varia- bility both of hybrids and of mongrels , and the steril ...
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Common terms and phrases
adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young