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 11
... appears not unfrequently , and we see it in the father and child , we cannot tell whether it may not be due to the same original cause acting on both ; but when among individuals , apparently ... appear VARIATION UNDER DOMESTICATION 11.
... appears not unfrequently , and we see it in the father and child , we cannot tell whether it may not be due to the same original cause acting on both ; but when among individuals , apparently ... appear VARIATION UNDER DOMESTICATION 11.
Page 12
... appear only in the offspring when 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 ...
... appear only in the offspring when 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 ...
Page 377
... appears in the parent , it tends to reappear at a corre- sponding age in the offspring . Certain variations can only appear at corresponding ages , for instance , peculiarities in the caterpillar , cocoon , or imago states of the silk ...
... appears in the parent , it tends to reappear at a corre- sponding age in the offspring . Certain variations can only appear at corresponding ages , for instance , peculiarities in the caterpillar , cocoon , or imago states of the silk ...
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