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 21
... doubt would not so perpetually recur . It has often been stated that domestic races do not differ from each other in character of generic value . It can be shown that this statement is not correct ; but naturalists differ much in ...
... doubt would not so perpetually recur . It has often been stated that domestic races do not differ from each other in character of generic value . It can be shown that this statement is not correct ; but naturalists differ much in ...
Página 189
... doubt that the love of man has become instinctive in the dog . All wolves , foxes , jack- als , and species of the cat genus , when kept tame , are most eager to attack poultry , sheep , and pigs ; and this tendency has been found ...
... doubt that the love of man has become instinctive in the dog . All wolves , foxes , jack- als , and species of the cat genus , when kept tame , are most eager to attack poultry , sheep , and pigs ; and this tendency has been found ...
Página 572
... doubt that with almost all animals , in which the sexes are separate , there is a constantly recurrent struggle ... doubt , would be ready to breed in the spring before the others ; and this is the opinion of Mr. Jenner Weir , who has ...
... doubt that with almost all animals , in which the sexes are separate , there is a constantly recurrent struggle ... doubt , would be ready to breed in the spring before the others ; and this is the opinion of Mr. Jenner Weir , who has ...
Contenido
INTRODUCTION | 3 |
VARIATION UNDER DOMESTICATION | 15 |
CHAPTER II | 38 |
Derechos de autor | |
Otras 23 secciones no mostradas
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 Argus pheasant beak beautiful become believe birds breeds cause characters 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 gradations greater number groups habits horns hybrids important individuals inhabitants inherited insects instance instincts intermediate islands kind larvæ latter Lepidoptera less likewise living Malay Archipelago males mammæ mammals manner Marsupials modified monkeys natural selection naturalists nearly nest observed occur ocelli offspring organs Origin of Species ornaments perfect period pigeons plants plumage pollen possess present probably produced progenitor quadrupeds races relation remarks resemble rudimentary seeds sexes sexual selection shew shewn slight South America sterility stridulating structure supposed tail tion transmitted variability variations varieties various vary whilst whole widely wings young Zoolog