Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1884 - 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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acquired action admit allied apes appear Asa Gray become believe birds blush body breeds Catarrhine cause characters closely Cloth Darwin degree descended developed distinct species domestic doubt early effects eggs existence expression extinct eyes fact favorable feel females fertilization forms gemmules genera geotropism habit hair HERBERT SPENCER hermaphrodites highly horse Illustrations increase individuals inhabitants inherited insects instance intermediate islands kind labellum lancelet language larvæ less living lower animals males mammals manner ment mental mind modified monkeys movements muscles natural selection naturalists observed offspring organic Origin of Species papillæ parent peculiar period plants pollen possess present principle probably produced Professor progenitors Quadrumana quadrupeds races remarkable resemble rudimentary savages seeds seems seen sexes sexual selection slight South America structure suppose T. H. HUXLEY tend tendency tion transmitted utricle variability variations varieties various vertebræ whole wild worms young