Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. 2
... young shoot at the extremity of the stem is at the same time bent to one side , so as to be out of the way . The young leaves of clematis , on the other hand , prepare for action by tem- porarily curving themselves downward , so as to ...
... young shoot at the extremity of the stem is at the same time bent to one side , so as to be out of the way . The young leaves of clematis , on the other hand , prepare for action by tem- porarily curving themselves downward , so as to ...
Стр. 14
... that at the same time there was no need for all the individuals to produce young , and conse- quently that no injury , on the contrary , good. 14 DARWINISM STATED BY DARWIN HIMSELF . Why the Sexes have been reseparated.
... that at the same time there was no need for all the individuals to produce young , and conse- quently that no injury , on the contrary , good. 14 DARWINISM STATED BY DARWIN HIMSELF . Why the Sexes have been reseparated.
Стр. 24
... young leaves , namely , unequal growth on the opposite sides ( as first proved by Pfeffer ) , yet they differ essentially in being excited chiefly by changes of temperature instead of light ; and in being effected , as far as we can ...
... young leaves , namely , unequal growth on the opposite sides ( as first proved by Pfeffer ) , yet they differ essentially in being excited chiefly by changes of temperature instead of light ; and in being effected , as far as we can ...
Стр. 30
... Young seedlings , which , as we know , cir- cumnutate rapidly , are eminently sensitive ; and we have seen the hypocotyl of Beta bending upward through 109 ° in three hours and eight minutes . The after - effects of apogeotropism last ...
... Young seedlings , which , as we know , cir- cumnutate rapidly , are eminently sensitive ; and we have seen the hypocotyl of Beta bending upward through 109 ° in three hours and eight minutes . The after - effects of apogeotropism last ...
Стр. 50
... young birds , according to Mr. Cunningham , can fly , while the adults have lost this power . As the larger ground - feeding birds seldom take flight , except to escape danger , it is probable that the nearly wingless condition of ...
... young birds , according to Mr. Cunningham , can fly , while the adults have lost this power . As the larger ground - feeding birds seldom take flight , except to escape danger , it is probable that the nearly wingless condition of ...
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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