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 260
... existing horse , belonged to an extinct species . Had this horse been still living , but in some degree rare , no naturalist would have felt the least sur- prise at its rarity ; for rarity is the attribute of a vast number of species of ...
... existing horse , belonged to an extinct species . Had this horse been still living , but in some degree rare , no naturalist would have felt the least sur- prise at its rarity ; for rarity is the attribute of a vast number of species of ...
Página 266
... existing genera . Cuvier ranked the Ruminants and Pachyderms as two of the most distinct orders of mammals : but so many fossil links have been disentombed that Owen has had to alter the whole classification , and has placed certain ...
... existing genera . Cuvier ranked the Ruminants and Pachyderms as two of the most distinct orders of mammals : but so many fossil links have been disentombed that Owen has had to alter the whole classification , and has placed certain ...
Página 331
... existing groups . As some few of the old and intermediate forms have transmitted to the present day descendants but little modified , these constitute our so - called osculant or aberrant species . The more aberrant any form is , the ...
... existing groups . As some few of the old and intermediate forms have transmitted to the present day descendants but little modified , these constitute our so - called osculant or aberrant species . The more aberrant any form is , the ...
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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