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 372
... called aberr- ant , and which may fancifully be called living fossils , will aid us in form- ing a picture of the ancient forms of life . Embryology will often reveal to us the structure , in some degree obscured , of the prototype of ...
... called aberr- ant , and which may fancifully be called living fossils , will aid us in form- ing a picture of the ancient forms of life . Embryology will often reveal to us the structure , in some degree obscured , of the prototype of ...
Página 382
... called workers . NICTITATING MEMBRANE . - A semi - transparent membrane , which can be drawr across the eye in Birds and Reptiles , either to moderate the effects of a strong light or to sweep particles of dust , & c . , from the ...
... called workers . NICTITATING MEMBRANE . - A semi - transparent membrane , which can be drawr across the eye in Birds and Reptiles , either to moderate the effects of a strong light or to sweep particles of dust , & c . , from the ...
Página 386
... called from the presence in most cases of a backbone com- posed of numerous joints or vertebra , which constitutes the centre of the skeleton and at the same time supports and protects the central parts of the nervous system . WHORLS ...
... called from the presence in most cases of a backbone com- posed of numerous joints or vertebra , which constitutes the centre of the skeleton and at the same time supports and protects the central parts of the nervous system . WHORLS ...
Contenido
INTRODUCTION | 3 |
VARIATION UNDER DOMESTICATION | 15 |
CHAPTER II | 38 |
Derechos de autor | |
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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