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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... seems to have been chiefly led to his conclusion on the gradual change of species , by the difficulty of dis- tinguishing species and varieties , by the almost perfect gradation of forms in certain groups , and by the analogy of ...
... seems to have been chiefly led to his conclusion on the gradual change of species , by the difficulty of dis- tinguishing species and varieties , by the almost perfect gradation of forms in certain groups , and by the analogy of ...
Página 409
... seems probable , due to reversion , it is a return to a very ancient state of things , because in the higher Quadrumana it is absent . bi There is another foramen or perforation in the humerus , occasionally present in man , which may ...
... seems probable , due to reversion , it is a return to a very ancient state of things , because in the higher Quadrumana it is absent . bi There is another foramen or perforation in the humerus , occasionally present in man , which may ...
Página 490
... seems to be the deeply planted social instinct . In the case of the lower animals it seems much more appropriate to speak of their social instincts , as having been developed for the general good rather than for the general happiness of ...
... seems to be the deeply planted social instinct . In the case of the lower animals it seems much more appropriate to speak of their social instincts , as having been developed for the general good rather than for the general happiness of ...
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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