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 209
... offspring not universal - Hy- brids and mongrels compared independently of their fertility - Summary . aidedw bas bo THE view commonly entertained by naturalists is that species , when inter crossed , have been specially endowed with ...
... offspring not universal - Hy- brids and mongrels compared independently of their fertility - Summary . aidedw bas bo THE view commonly entertained by naturalists is that species , when inter crossed , have been specially endowed with ...
Página 572
... offspring to in- herit their superiority than their beaten and less attractive rivals . Unless this result does follow , the characters which give to certain males an ad- vantage over others , could not be perfected and augmented ...
... offspring to in- herit their superiority than their beaten and less attractive rivals . Unless this result does follow , the characters which give to certain males an ad- vantage over others , could not be perfected and augmented ...
Página 771
... offspring , their female off- spring still inheriting the slaty tint . If so , the desired end of making a breed with the two sexes permanently different in colour might be gained . The extreme importance , or rather necessity in the ...
... offspring , their female off- spring still inheriting the slaty tint . If so , the desired end of making a breed with the two sexes permanently different in colour might be gained . The extreme importance , or rather necessity in the ...
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