The Origin of Species, Том 2Books, Incorporated, 1900 - Всего страниц: 365 |
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Стр. 254
... facts showing that , when animals and plants are removed from their natural conditions , they are extremely liable to have their reproductive systems seriously affected . This , in fact , is the great bar to the domestication of animals ...
... facts showing that , when animals and plants are removed from their natural conditions , they are extremely liable to have their reproductive systems seriously affected . This , in fact , is the great bar to the domestication of animals ...
Стр. 345
... facts could be given in regard to terrestrial animals . In marine productions , similar cases likewise occur ; as an example , I may quote a statement by the highest authority , Professor Dana , that " it is certainly a wonderful fact ...
... facts could be given in regard to terrestrial animals . In marine productions , similar cases likewise occur ; as an example , I may quote a statement by the highest authority , Professor Dana , that " it is certainly a wonderful fact ...
Стр. 349
... facts , until we can say why one species and not another becomes naturalized by man's agency in a foreign land ; why one species ranges twice or thrice as far , and is twice or thrice as common , as another species within their own ...
... facts , until we can say why one species and not another becomes naturalized by man's agency in a foreign land ; why one species ranges twice or thrice as far , and is twice or thrice as common , as another species within their own ...
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Часто встречающиеся слова и выражения
adapted admit affinity ancient animals appear Archipelago areas become believe belonging birds Cambrian characters classification climate closely allied species common continent creation crustaceans degree deposits descent with modification developed difficulty distant distinct species domestic doubt embryo Europe existing extinct facts faunas fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important INDIANENSIS individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammæ mammals manner marine Marsupials MDCCCXX migration modified descendants mongrels mountains natural selection naturalists nearly oceanic islands offspring parent peculiar perfect pistil plants pollen present probably produced progenitor quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds SIGILLUM Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory of natural tion variations varieties VERITAS whole widely different