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 740
... birds enough ready to replace immediately a lost mate of either sex ? Magpies , jays , carrion - crows , partridges , and some other birds , are always seen during the spring in pairs , and never by themselves ; and these offer at first ...
... birds enough ready to replace immediately a lost mate of either sex ? Magpies , jays , carrion - crows , partridges , and some other birds , are always seen during the spring in pairs , and never by themselves ; and these offer at first ...
Página 744
... birds whilst at play . The bower of the Spotted bower - bird " is beautifully lined with tall grasses , so disposed that the heads nearly meet , and the decora- tions are very profuse . " Round stones are used to keep the grass - stems ...
... birds whilst at play . The bower of the Spotted bower - bird " is beautifully lined with tall grasses , so disposed that the heads nearly meet , and the decora- tions are very profuse . " Round stones are used to keep the grass - stems ...
Página 809
... birds of the world , it appears that their beauty has been much increased since that period , of which their immature plumage gives us a partial record . On the Colour of the Plumage in relation to Protection . - It will have been seen ...
... birds of the world , it appears that their beauty has been much increased since that period , of which their immature plumage gives us a partial record . On the Colour of the Plumage in relation to Protection . - It will have been seen ...
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 the Species by Means of Natural Selection Charles Darwin Sin vista previa disponible - 2012 |
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