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 117
... variations in two or more distinct races . The frequent presence of fourteen or even sixteen tail - feathers in the pouter may be considered as a variation representing the normal structure of another race , the fan- tail . I presume ...
... variations in two or more distinct races . The frequent presence of fourteen or even sixteen tail - feathers in the pouter may be considered as a variation representing the normal structure of another race , the fan- tail . I presume ...
Página 181
... variations have often occurred under nature , as are known occa- sionally to arise under domestication . Of these latter variations several may be attributed to reversion ; and the characters which thus reappear were , it is probable ...
... variations have often occurred under nature , as are known occa- sionally to arise under domestication . Of these latter variations several may be attributed to reversion ; and the characters which thus reappear were , it is probable ...
Página 667
... variations by which the female has been modified have been trans- mitted to her alone . It is , however , probable that some of the many suc- cessive variations would have been transmitted to , and developed in , the males had not such ...
... variations by which the female has been modified have been trans- mitted to her alone . It is , however , probable that some of the many suc- cessive variations would have been transmitted to , and developed in , the males had not such ...
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