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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Resultados 6-10 de 76
Página 15
... domestic race , as already remarked , less uni- formity of character than in true species . Domestic races of the same species , also , often have a somewhat monstrous character ; by which I mean , that , although differing from each ...
... domestic race , as already remarked , less uni- formity of character than in true species . Domestic races of the same species , also , often have a somewhat monstrous character ; by which I mean , that , although differing from each ...
Página 16
... or several wild species . The argument mainly relied on by those who believe in the multiple origin of our domestic animals is , that we find in the most ancient records , more especially on 16 ON THE ORIGIN OF SPECIES.
... or several wild species . The argument mainly relied on by those who believe in the multiple origin of our domestic animals is , that we find in the most ancient records , more especially on 16 ON THE ORIGIN OF SPECIES.
Página 17
... domestic dog , may not have existed in Egypt ? The whole subject must , I think , remain vague ; nevertheless , I may , without here entering on any details , state that , from geographical and other con- siderations , I think it highly ...
... domestic dog , may not have existed in Egypt ? The whole subject must , I think , remain vague ; nevertheless , I may , without here entering on any details , state that , from geographical and other con- siderations , I think it highly ...
Página 18
... domestic races from several aboriginal stocks , has been carried to an absurd extreme by some authors . They believe ... domestic breeds have originated in Europe ; for whence could they have been derived , as these several countries do ...
... domestic races from several aboriginal stocks , has been carried to an absurd extreme by some authors . They believe ... domestic breeds have originated in Europe ; for whence could they have been derived , as these several countries do ...
Página 19
... Domestic Pigeon . - Believing that it is always best to study some special group , I have , after deliberation , taken up domestic pigeons . I have kept every breed which I could purchase or obtain , and have been most kindly favoured ...
... Domestic Pigeon . - Believing that it is always best to study some special group , I have , after deliberation , taken up domestic pigeons . I have kept every breed which I could purchase or obtain , and have been most kindly favoured ...
Otras ediciones - Ver todas
On the Origin of Species by Means of Natural Selection: or the Preservation ... Charles Darwin Vista previa limitada - 2023 |
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