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 25
... supposed aboriginal stocks must all have been rock - pigeons , that is , they did not breed or willingly perch on trees . But besides C. livia , with its geographical sub - species , only two or three other species of rock - pigeons are ...
... supposed aboriginal stocks must all have been rock - pigeons , that is , they did not breed or willingly perch on trees . But besides C. livia , with its geographical sub - species , only two or three other species of rock - pigeons are ...
Página 88
... supposed to be extremely slight , but of the most diversified nature ; they are not supposed all to appear simultaneously , but often after long intervals of time ; nor are they all supposed to endure for equal periods . Only those ...
... supposed to be extremely slight , but of the most diversified nature ; they are not supposed all to appear simultaneously , but often after long intervals of time ; nor are they all supposed to endure for equal periods . Only those ...
Página 92
... supposed progenitor of our several new sub - genera and genera . It is worth while to reflect for a moment on the character of the new species F14 , which is supposed not to have diverged much in character , but to have retained the ...
... supposed progenitor of our several new sub - genera and genera . It is worth while to reflect for a moment on the character of the new species F14 , which is supposed not to have diverged much in character , but to have retained the ...
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