The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life and The Descent of Man and Selection in Relation to SexModern library, 1936 - 1000 páginas |
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Página 787
... young in relation to the summer and winter plumage of the adults - On the increase of beauty in the birds of the ... young and the old , as far as known to me , may be included , it will be well to make a few preliminary remarks . With ...
... young in relation to the summer and winter plumage of the adults - On the increase of beauty in the birds of the ... young and the old , as far as known to me , may be included , it will be well to make a few preliminary remarks . With ...
Página 788
... young closely resemble each other , and differ much from their respective adult parents . The young of almost all the Gallinaceæ , and of some distantly allied birds such as estriches , are covered with longitu- dinally striped down ...
... young closely resemble each other , and differ much from their respective adult parents . The young of almost all the Gallinaceæ , and of some distantly allied birds such as estriches , are covered with longitu- dinally striped down ...
Página 803
... young . In either case sexual selection must have acted on the male when he had to compete with rivals for the possession of the female ; and in both cases the characters thus acquired have been transmitted to both sexes and all ages ...
... young . In either case sexual selection must have acted on the male when he had to compete with rivals for the possession of the female ; and in both cases the characters thus acquired have been transmitted to both sexes and all ages ...
Otras ediciones - Ver todas
The Origin of Species by Means of Natural Selection: Or, The Preservation of ... Charles Darwin Vista de fragmentos - 1936 |
The Origin of Species by Means of Natural Selection: Or, The Preservation of ... Charles Darwin Vista de fragmentos - 1936 |
The Origin of Species by Means of Natural Selection: Or, The Preservation of ... Charles Darwin Vista de fragmentos - 1936 |
Términos y frases comunes
acquired adult allied apes appear beak beautiful become believe birds breeds cause characters civilised closely colour common confined crossed crustaceans degree descended developed distinct species domestic doubt eggs existing extinct extremely fact favourable feathers female fertility fishes formation forms Fritz Müller genera genus given gradations greater number groups habits Hence hybrids important individuals inhabitants inherited insects instance instincts intermediate islands kind larvæ latter Lepidoptera less likewise living lower animals Malay Archipelago males mammæ mammals manner Marsupials modified monkeys natural selection naturalists nearly nest observed ocelli offspring organs Origin of Species ornaments perfect period pigeons plumage pollen present probably produced progenitor quadrupeds races Red Grouse relation remarks resemble rudimentary seeds sexes sexual selection shew shewn slight South America sterility stridulating structure supposed tail tion variability variations varieties various vary whilst whole widely wings young