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 11
... seen , and will be hereafter briefly mentioned . I will here only allude to what may be called correlation of growth . Any change in the embryo or larva will almost certainly entail changes in the mature animal . In monstrosities , the ...
... seen , and will be hereafter briefly mentioned . I will here only allude to what may be called correlation of growth . Any change in the embryo or larva will almost certainly entail changes in the mature animal . In monstrosities , the ...
Página 32
... though the old Spanish pointer certainly came from Spain , Mr. Borrow has not seen , as I am informed by him , any native dog in Spain like our pointer . By a similar process of selection , and by careful 32 ON THE ORIGIN OF SPECIES.
... though the old Spanish pointer certainly came from Spain , Mr. Borrow has not seen , as I am informed by him , any native dog in Spain like our pointer . By a similar process of selection , and by careful 32 ON THE ORIGIN OF SPECIES.
Página 34
... seen great surprise expressed in horticultural works at the wonderful skill of gardeners , in having produced such splendid results from such poor materials ; but the art , I cannot doubt , has been simple , and , as far as the final ...
... seen great surprise expressed in horticultural works at the wonderful skill of gardeners , in having produced such splendid results from such poor materials ; but the art , I cannot doubt , has been simple , and , as far as the final ...
Página 38
... seen it gravely remarked , that it was most fortunate that the straw- berry began to vary just when gardeners began to attend closely to this plant . No doubt the strawberry had always varied since it was cultivated , but the slight ...
... seen it gravely remarked , that it was most fortunate that the straw- berry began to vary just when gardeners began to attend closely to this plant . No doubt the strawberry had always varied since it was cultivated , but the slight ...
Página 48
... exterminate the parent species ; or both might co - exist , and both rank as independent species . But we shall hereafter have to return to this subject . From these remarks it will be seen that I look 48 ON THE ORIGIN OF SPECIES.
... exterminate the parent species ; or both might co - exist , and both rank as independent species . But we shall hereafter have to return to this subject . From these remarks it will be seen that I look 48 ON THE ORIGIN OF SPECIES.
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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