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 |
Dentro del libro
Resultados 1-3 de 76
Página 25
... breeds several truly - in- herited sub - breeds , or species , as he would call them , could be shown him . Great as are the differences between the breeds of the pigeon , I am fully convinced that the common opinion of naturalists is ...
... breeds several truly - in- herited sub - breeds , or species , as he would call them , could be shown him . Great as are the differences between the breeds of the pigeon , I am fully convinced that the common opinion of naturalists is ...
Página 27
... breeds of the pi geon are perfectly fertile , as I can state from my own observations , pur- posely made , on the most distinct breeds . Now , hardly any cases have been ascertained with certainty of hybrids from two quite distinct ...
... breeds of the pi geon are perfectly fertile , as I can state from my own observations , pur- posely made , on the most distinct breeds . Now , hardly any cases have been ascertained with certainty of hybrids from two quite distinct ...
Página 593
... breeds in which the adult male differs greatly in colour from the female , as well as from the wild parent - species , he differs also from the young male , so that the newly - ac- quired characters must have appeared at a rather late ...
... breeds in which the adult male differs greatly in colour from the female , as well as from the wild parent - species , he differs also from the young male , so that the newly - ac- quired characters must have appeared at a rather late ...
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