On the Origin of Species by Means of Natural Selection: Or The Preservation of Favoured Races in the Struggle for LifeHumphrey Milford, Oxford University Press, 1923 - 454 páginas |
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Página 99
Or The Preservation of Favoured Races in the Struggle for Life Charles Darwin. same region at the same time . I further believe , that this very slow ... region is as yet fully stocked , for at the Cape of Good Hope NATURAL SELECTION 99.
Or The Preservation of Favoured Races in the Struggle for Life Charles Darwin. same region at the same time . I further believe , that this very slow ... region is as yet fully stocked , for at the Cape of Good Hope NATURAL SELECTION 99.
Página 105
... region is , in fact , the same as that of the physiological division of labour in the organs of the same individual body - a subject so well elucidated by Milne Edwards . No physiologist doubts that a stomach adapted to digest vegetable ...
... region is , in fact , the same as that of the physiological division of labour in the organs of the same individual body - a subject so well elucidated by Milne Edwards . No physiologist doubts that a stomach adapted to digest vegetable ...
Página 127
... region cannot endure a tropical climate , or conversely . So again , many succulent plants cannot endure a damp climate . But the degree of adaptation of species to the climates under which they live is often overrated . We may infer ...
... region cannot endure a tropical climate , or conversely . So again , many succulent plants cannot endure a damp climate . But the degree of adaptation of species to the climates under which they live is often overrated . We may infer ...
Página 156
... region , though they must have existed there , and may be embedded there in a fossil condition . But in the intermediate region , having intermediate conditions of life , why do we not now find closely - linking intermediate varieties ...
... region , though they must have existed there , and may be embedded there in a fossil condition . But in the intermediate region , having intermediate conditions of life , why do we not now find closely - linking intermediate varieties ...
Página 159
... region ; a second to a comparatively narrow , hilly tract ; and a third to wide plains at the base ; and that the inhabitants are all trying with equal steadiness and skill to improve their stocks by selection ; the chances in this case ...
... region ; a second to a comparatively narrow , hilly tract ; and a third to wide plains at the base ; and that the inhabitants are all trying with equal steadiness and skill to improve their stocks by selection ; the chances in this case ...
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Términos y frases comunes
accumulated adapted affinities allied species America amount analogous ancient appear Archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence doubt embryo endemic Europe existing exterminated extinct extremely facts favourable fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation vary whole widely