The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life, Volume 1 |
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Page 70
... genera on one side , and those of the smaller genera on the other side , and it has invariably proved to be the case that a larger pro- portion of the species on the side of the larger genera presented varieties , than on the side of ...
... genera on one side , and those of the smaller genera on the other side , and it has invariably proved to be the case that a larger pro- portion of the species on the side of the larger genera presented varieties , than on the side of ...
Page 71
... Genera resemble Varieties in being very closely , but unequally , related to each other , and in having restricted ranges . There are other relations between the species of large genera and their recorded varieties which deserve notice ...
... Genera resemble Varieties in being very closely , but unequally , related to each other , and in having restricted ranges . There are other relations between the species of large genera and their recorded varieties which deserve notice ...
Page 72
... genera are related to each other , in the same manner as the varieties of any one species are related to each other . No naturalist pretends that all the species of a genus are equally distinct from each other ; they may generally be ...
... genera are related to each other , in the same manner as the varieties of any one species are related to each other . No naturalist pretends that all the species of a genus are equally distinct from each other ; they may generally be ...
Page 73
... genera having more than the average number of species in any country , the species of these genera have more than the average number of varieties . In large genera the species are apt to be closely , but unequally , allied together ...
... genera having more than the average number of species in any country , the species of these genera have more than the average number of varieties . In large genera the species are apt to be closely , but unequally , allied together ...
Page 74
... genera present a strong analogy with varieties . And we can clearly understand these analogies , if species once ... genera within each class which on an average yield the greatest number of varieties ; and varieties , as we shall ...
... genera present a strong analogy with varieties . And we can clearly understand these analogies , if species once ... genera within each class which on an average yield the greatest number of varieties ; and varieties , as we shall ...
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Common terms and phrases
adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree developed difficulty distinct species disuse divergence domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important improved increase in number individual differences inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less likewise males manner Melipona Mivart natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species perfect period pigeons pollen pollen-grains present preserved principle probably produced progenitor quadrupeds rank Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens structure struggle supposed swimbladder tend tendency tion transitional tree variability variations varieties vary widely wings young