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 12
... nearly mature ; peculiarities in the silkworm are known to appear at the corresponding caterpillar or cocoon stage . But hereditary diseases and some other facts make me believe that the rule has a wider extension , and that when there ...
... nearly mature ; peculiarities in the silkworm are known to appear at the corresponding caterpillar or cocoon stage . But hereditary diseases and some other facts make me believe that the rule has a wider extension , and that when there ...
Page 107
... nearly related to their parents . Hence very few of the original species will have transmitted offspring to the fourteen - thousandth generation . We may suppose that only one ( F ) of the two species which were least closely related to ...
... nearly related to their parents . Hence very few of the original species will have transmitted offspring to the fourteen - thousandth generation . We may suppose that only one ( F ) of the two species which were least closely related to ...
Page 193
... nearly so great as it at first appears : all this beautiful work can be shown , I think , to follow from a few very ... nearly related to the latter : it forms a nearly regular waxen comb of cylindrical cells , in which the young are ...
... nearly so great as it at first appears : all this beautiful work can be shown , I think , to follow from a few very ... nearly related to the latter : it forms a nearly regular waxen comb of cylindrical cells , in which the young are ...
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