On the Origin of Species by Means of Natural Selection |
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Page 53
... fossil land - shells in Madeira . If a variety were to flourish so as to exceed in numbers the parent species , it would then rank as the species , and the species as the variety ; or it might come to supplant and exterminate the parent ...
... fossil land - shells in Madeira . If a variety were to flourish so as to exceed in numbers the parent species , it would then rank as the species , and the species as the variety ; or it might come to supplant and exterminate the parent ...
Page 100
... fossils , connect to a certain extent orders now widely separated in the natural scale . These anomalous forms may almost be called living fossils ; they have endured to the present day , from hav- ing inhabited a confined area , and ...
... fossils , connect to a certain extent orders now widely separated in the natural scale . These anomalous forms may almost be called living fossils ; they have endured to the present day , from hav- ing inhabited a confined area , and ...
Page 119
... fossil state . As we here and there see a thin straggling branch springing from a fork low down in a tree , and which by some chance has been favoured and is still alive on its summit , so we occasionally see an animal like the ...
... fossil state . As we here and there see a thin straggling branch springing from a fork low down in a tree , and which by some chance has been favoured and is still alive on its summit , so we occasionally see an animal like the ...
Page 150
... fossil shells had never lived , but had been created in stone so as to mock the shells now living on the sea - shore . Summary . Our ignorance of the laws of variation is profound . Not in one case out of a hundred can we pretend to ...
... fossil shells had never lived , but had been created in stone so as to mock the shells now living on the sea - shore . Summary . Our ignorance of the laws of variation is profound . Not in one case out of a hundred can we pretend to ...
Page 156
... fossil condition . But in the inter- mediate region , having intermediate conditions of life , why do we not now find closely - linking intermediate varieties ? This difficulty for a long time quite confounded me . But I think it can be ...
... fossil condition . But in the inter- mediate region , having intermediate conditions of life , why do we not now find closely - linking intermediate varieties ? This difficulty for a long time quite confounded me . But I think it can be ...
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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