Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. ix
... Male and Female Plants Effect of Climate on Reproduction Causes of Sterility among Plants An " Ideal Type " or Inevitable Modification Special Adaptations to a Changing Purpose . 2 4 6 8 9 9 11 12 14 15 16 . 17 18 . 19 21 Interposition ...
... Male and Female Plants Effect of Climate on Reproduction Causes of Sterility among Plants An " Ideal Type " or Inevitable Modification Special Adaptations to a Changing Purpose . 2 4 6 8 9 9 11 12 14 15 16 . 17 18 . 19 21 Interposition ...
Стр. xiii
... Males for the Possession of the Females Courtship among the Lower Animals . 236 237 Why the Male plays the more Active Part in Courting Transmission of Sexual Characteristics 239 . 240 An Objection answered Difference between the Sexes ...
... Males for the Possession of the Females Courtship among the Lower Animals . 236 237 Why the Male plays the more Active Part in Courting Transmission of Sexual Characteristics 239 . 240 An Objection answered Difference between the Sexes ...
Стр. 12
... male . There are also many other methods by which organisms can be propagated asexually . Why then have the two sexes been developed , and why do males exist which can not themselves produce offspring ? The an- swer. 12 DARWINISM STATED ...
... male . There are also many other methods by which organisms can be propagated asexually . Why then have the two sexes been developed , and why do males exist which can not themselves produce offspring ? The an- swer. 12 DARWINISM STATED ...
Стр. 13
... male ; though these sexual names ought hardly to be applied as long as the whole contents of the two forms are blended into one . The object gained by the two sexes becoming united in the same hermaphrodite form probably is to allow of ...
... male ; though these sexual names ought hardly to be applied as long as the whole contents of the two forms are blended into one . The object gained by the two sexes becoming united in the same hermaphrodite form probably is to allow of ...
Стр. 14
... male and female glands , when placed in different parts of the same com- pound or simple individual , should not perform their functions equally well as when placed in two distinct in- dividuals . In some instances the sexes may have ...
... male and female glands , when placed in different parts of the same com- pound or simple individual , should not perform their functions equally well as when placed in two distinct in- dividuals . In some instances the sexes may have ...
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Часто встречающиеся слова и выражения
acid acquired action adapted admit allied animals apes appear become believe birds body breeds cause character climate closely compared cotyledons crossed degree descended developed distinct species disuse domestic doubt early effects eggs embryo existence extinct eyes fact female fertilization forms gemmules genera genus geotropism Glacial habits hairs hermaphrodites highly horses increase individuals inhabitants inherited insects instance instincts islands kinds labellum lancelet larvæ leaves less living lower animals Malaxis paludosa males mammals manner mental millimetre modified monkeys movements muscles natural selection naturalists observed occasionally offspring organs Origin of Species ovules papillæ parent peculiar period pigeon plants points pollen pollinium possess present prey probably produced progenitors Quadrumana quadrupeds races radicles remarkable resemble rudimentary savages seedlings seeds seems sexes sexual elements sexual selection slight structure suppose surface tend tendency tion transmitted utricle variability variations varieties various vertebræ whole wild worms young