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 16
... extremely rare under nature , but far from rare under cultivation ; and in this case we see that the treatment of the parent has affected a bud or offset , and not the ovules or pollen . But it is the opinion of most physiologists that ...
... extremely rare under nature , but far from rare under cultivation ; and in this case we see that the treatment of the parent has affected a bud or offset , and not the ovules or pollen . But it is the opinion of most physiologists that ...
Page 17
... extremely valuable . When all or nearly all the individ- uals exposed to certain conditions are affected in the same way , the change at first appears to be directly due to such conditions ; but in some cases it can be shown that quite ...
... extremely valuable . When all or nearly all the individ- uals exposed to certain conditions are affected in the same way , the change at first appears to be directly due to such conditions ; but in some cases it can be shown that quite ...
Page 23
... extremely remote as measured by years ; and we know that at the present day there is hardly any tribe so barbarian as not to have domesticated at least the dog . The whole subject must , I think , remain vague ; nev- ertheless , I may ...
... extremely remote as measured by years ; and we know that at the present day there is hardly any tribe so barbarian as not to have domesticated at least the dog . The whole subject must , I think , remain vague ; nev- ertheless , I may ...
Page 25
... extremely different races or species , I can hardly believe . Sir J. Sebright expressly experimentised for this object , and failed . The offspring from the first cross between two pure breeds is tolerably and sometimes ( as I have ...
... extremely different races or species , I can hardly believe . Sir J. Sebright expressly experimentised for this object , and failed . The offspring from the first cross between two pure breeds is tolerably and sometimes ( as I have ...
Page 36
... extremely alike the flowers ; how unlike the flowers of the heartsease are , and how alike the leaves ; how much the fruit of the different kinds of gooseberries differ in size , colour , shape , and hairiness , and yet the flowers ...
... extremely alike the flowers ; how unlike the flowers of the heartsease are , and how alike the leaves ; how much the fruit of the different kinds of gooseberries differ in size , colour , shape , and hairiness , and yet the flowers ...
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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 disuse 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 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