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 9
... young ; whereas carnivorous birds , with the rarest exceptions , hardly ever lay fertile eggs . Many exotic plants have pollen utterly worthless , in the same exact condition as in the most sterile hybrids . When , on the one hand , we ...
... young ; whereas carnivorous birds , with the rarest exceptions , hardly ever lay fertile eggs . Many exotic plants have pollen utterly worthless , in the same exact condition as in the most sterile hybrids . When , on the one hand , we ...
Page 10
... young of the same litter , sometimes differ considerably from each other , though both the young and the parents , as Müller has remarked , have apparently been exposed to exactly the same conditions of life ; and this shows how unim ...
... young of the same litter , sometimes differ considerably from each other , though both the young and the parents , as Müller has remarked , have apparently been exposed to exactly the same conditions of life ; and this shows how unim ...
Page 59
... young naturalist commences the study of a group of organisms quite unknown to him , he is at first much perplexed to determine what differences to con- sider as specific , and what as varietal ; for he knows nothing of the amount and ...
... young naturalist commences the study of a group of organisms quite unknown to him , he is at first much perplexed to determine what differences to con- sider as specific , and what as varietal ; for he knows nothing of the amount and ...
Page 74
... young in this interval ; if this be so , at the end of the fifth century there would be alive fifteen million elephants , descended from the first pair . But we have better evidence on this subject than mere theoretical calculations ...
... young in this interval ; if this be so , at the end of the fifth century there would be alive fifteen million elephants , descended from the first pair . But we have better evidence on this subject than mere theoretical calculations ...
Page 75
... young , and that nearly all the young have been enabled to breed . In such cases the geometrical ratio of increase , the result of which never fails to be surprising , simply explains the extraordinarily rapid increase and wide ...
... young , and that nearly all the young have been enabled to breed . In such cases the geometrical ratio of increase , the result of which never fails to be surprising , simply explains the extraordinarily rapid increase and wide ...
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Common terms and phrases
adapted affinities allied species America analogous ancient appear archipelago become bees believe birds breeds cause cells characters climate closely allied colour common continued crossed crustaceans degree difficulty distinct species doubt Edition eggs embryo Europe existing exterminated extinct extremely facts favourable Fcap females fertilised fertility flowers formation forms fossil Fritz Müller Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites History hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring organic organisation parent perfect pigeons pistil plants pollen Post 8vo present principle probably produced progenitor racters ranked reciprocal crosses remarked resemble rudimentary seeds Silurian slight South America stamens sterility structure struggle successive supposed theory tion variability variations varieties vary Vols whole widely Woodcuts