On the Origin of Species by Means of Natural Selection |
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Page 15
... appearing to be far more susceptible than any other part of the organisation , to the action of any change in the conditions of life . Nothing is more easy than to tame an animal , and few things more difficult than to get it to breed ...
... appearing to be far more susceptible than any other part of the organisation , to the action of any change in the conditions of life . Nothing is more easy than to tame an animal , and few things more difficult than to get it to breed ...
Page 17
... appears to be directly due to such conditions ; but in some cases it can be shown that quite opposite conditions produce similar changes of struc- ture . Nevertheless some slight amount of change may , I think , be attributed to the ...
... appears to be directly due to such conditions ; but in some cases it can be shown that quite opposite conditions produce similar changes of struc- ture . Nevertheless some slight amount of change may , I think , be attributed to the ...
Page 18
... appears that white sheep and pigs are differently affected from coloured individuals by certain vegetable poisons . Hairless dogs have imper- fect teeth ; long - haired and coarse - haired animals are apt to have , as is asserted , long ...
... appears that white sheep and pigs are differently affected from coloured individuals by certain vegetable poisons . Hairless dogs have imper- fect teeth ; long - haired and coarse - haired animals are apt to have , as is asserted , long ...
Page 19
... appears , it tends to appear in the offspring at a correspond- ing age , though sometimes earlier . In many cases this could not be otherwise : thus the inherited peculiarities in the horns of cattle could appear only in the offspring ...
... appears , it tends to appear in the offspring at a correspond- ing age , though sometimes earlier . In many cases this could not be otherwise : thus the inherited peculiarities in the horns of cattle could appear only in the offspring ...
Page 20
... 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 is no apparent reason why a peculiarity should appear at ...
... 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 is no apparent reason why a peculiarity should appear at ...
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Common terms and phrases
accumulated adapted affinities allied species America amount ancient animals appear become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic 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 intermediate land larvæ laws less living look male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring organic organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rudimentary seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation varieties vary whole widely