Darwinism: An Exposition of the Theory of Natural Selection, with Some of Its ApplicationsMacmillan, 1891 - Всего страниц: 494 |
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Стр. 5
... peculiar adaptations which are characteristic of their species , and which cannot be supposed to have arisen from subordinate influences . Those which live in shoals cannot be supposed to have been created in single pairs . Those which ...
... peculiar adaptations which are characteristic of their species , and which cannot be supposed to have arisen from subordinate influences . Those which live in shoals cannot be supposed to have been created in single pairs . Those which ...
Стр. 23
... peculiar characteristics of these vast level plains which descend from the Andes to the great river basin in unbroken monotony , are the absence of rivers or water - storage , and the periodical occurrence of droughts , or ' siccos ...
... peculiar characteristics of these vast level plains which descend from the Andes to the great river basin in unbroken monotony , are the absence of rivers or water - storage , and the periodical occurrence of droughts , or ' siccos ...
Стр. 38
... peculiar to those seized by wild beasts , but is equally produced by any accident which causes a general shock to the system . Mr. Whymper describes an accident to himself during one of his preliminary explorations of the Matterhorn ...
... peculiar to those seized by wild beasts , but is equally produced by any accident which causes a general shock to the system . Mr. Whymper describes an accident to himself during one of his preliminary explorations of the Matterhorn ...
Стр. 74
... peculiar features of individual variability . Variations of the Habits of Animals . Closely connected with those variations of internal and external structure which have been already described , are the changes of habits which often ...
... peculiar features of individual variability . Variations of the Habits of Animals . Closely connected with those variations of internal and external structure which have been already described , are the changes of habits which often ...
Стр. 93
... peculiar voice unlike that of any other pigeon . The coo is rapidly repeated , and is continued for several minutes . The feet are covered with feathers so large as often to appear like little wings . RACE XI . comprises Laughers ...
... peculiar voice unlike that of any other pigeon . The coo is rapidly repeated , and is continued for several minutes . The feet are covered with feathers so large as often to appear like little wings . RACE XI . comprises Laughers ...
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abundant adapted adduced allied species America amount animals and plants appears birds breed brilliant butterflies carnivora cause characters climate closely allied colours of animals common conspicuous continued cross-fertilisation crossed curious Darwin dicotyledons distinct species domestic animals effects eggs enemies Eocene evidence extinct facts faculty favourable female fertile fertilised flowers genera genus geological groups habits hybrids illustration important increase individuals infertility inhabit insects intercrossing kind larvæ less living male mammalia mammals markings marsupials mimicry Miocene mode modified moths natural selection naturalists nests occur offspring organs Origin of Species peculiar pigeons Pliocene pollen portion possess probably produced Professor protectively coloured pupa races regions remarkable resemble seeds self-fertilisation Silurian similar South America specimens spots sterility structure struggle for existence supposed tail theory tints tion toes trees tropical usually variability variation varied varieties vegetation warning colours whole wild wings