Organic EvolutionMacmillan, 1917 - Всего страниц: 743 |
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Стр. 5
... fauna necessitated the creation of a new one to take its place . That belief , however , was held by later scholars of the same school , but apparently not by Cuvier . What Cuvier believed was that the catastrophes were local , " sudden ...
... fauna necessitated the creation of a new one to take its place . That belief , however , was held by later scholars of the same school , but apparently not by Cuvier . What Cuvier believed was that the catastrophes were local , " sudden ...
Стр. 48
... fauna ; the dense tropical forest , the bleakest mountain , the scorching heat and drought of the desert , the devastating cold of the polar regions : each has its quota of in- habitants , living out their lives as best they may ...
... fauna ; the dense tropical forest , the bleakest mountain , the scorching heat and drought of the desert , the devastating cold of the polar regions : each has its quota of in- habitants , living out their lives as best they may ...
Стр. 50
... fauna which in many respects resembles that of Africa . North of the barrier , conditions of climate , both in temperature and degree of moisture , are entirely changed , and with them appear animals , with some notable exceptions , of ...
... fauna which in many respects resembles that of Africa . North of the barrier , conditions of climate , both in temperature and degree of moisture , are entirely changed , and with them appear animals , with some notable exceptions , of ...
Стр. 54
... fauna and flora of a district is bound together by a complicated network of particular conditions , and the slightest alteration in any detail may upset the balance of the whole and lead to far - reaching and unforeseen results ...
... fauna and flora of a district is bound together by a complicated network of particular conditions , and the slightest alteration in any detail may upset the balance of the whole and lead to far - reaching and unforeseen results ...
Стр. 59
... fauna underwent a remarkable evolution , without the admixture of forms from the other . The re - formation of the land bridge , however , opened up the avenues of migration , and we find re- corded the immediate incursion of the more ...
... fauna underwent a remarkable evolution , without the admixture of forms from the other . The re - formation of the land bridge , however , opened up the avenues of migration , and we find re- corded the immediate incursion of the more ...
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Часто встречающиеся слова и выражения
adaptation adaptive radiation adult aërial Africa Amphibia ancestral animals appearance aquatic aquatic adaptation arboreal become birds body bone camel carnivorous cave cells Chapter characteristics characters color comparable creatures Cretaceous cursorial Darwin digits dinosaurs elephant elongated entire Eocene epigean evolution evolutionary existence extinct fauna feet female fins fishes flying foot forms fossil fossorial genera genus geologic germ-plasm gills habitat hand hence hind limbs horse ichthyosaurs increase individual inheritance insects instance Kellogg known larvæ later length light living lizards lower male mammals marsupials mastodons Mesozoic Miocene modification muscles Museum natural selection neck North America notochord offspring Oligocene organs origin Orthogenesis Osborn pair parasitic patagium plants Pleistocene Pliocene primitive proboscidean produced protoplasm race reptiles result shell skeleton skull Smilodon species structure surface tail teeth terrestrial theory tion tooth true tusks types ungulates upper variation vertebrates whales wings young
Популярные отрывки
Стр. 3 - The result, therefore, of this physical inquiry is, that we find no vestige of a beginning, — no prospect of an end"§.
Стр. 149 - And he set the rods which he had pilled before the flocks in the gutters in the watering troughs when the flocks came to drink, that they should conceive when they came to drink.
Стр. 109 - Near villages and small towns I have found the nests of humblebees more numerous than elsewhere, which I attribute to the number of cats that destroy the mice.
Стр. 10 - Lamarck (1744-1829) was one of the most remarkable as well as one of the most pathetic figures in evolutionary history.
Стр. 9 - ... all animals undergo perpetual transformations; which are in part produced by their own exertions in consequence of their desires and aversions, of their pleasures and their pains, or of irritations, or of associations; and many of these acquired forms or propensities are transmitted to their posterity.
Стр. 27 - ... of California, towering to the dimensions of a cathedral spire, or the Indian fig, which covers acres with its profound shadow, and endures while nations and empires come and go around its vast circumference. Or, turning to the other half of the world of life, picture to...
Стр. 659 - Perhaps no order of mammals presents us with so extraordinary a series of gradations as this— leading us insensibly from the crown and summit of the animal creation down to creatures, from which there is but a step, as it seems, to the lowest, smallest, and least intelligent of the placcntal Mammalia.
Стр. 15 - Origin,' and for some years afterwards, I could find little good evidence of the direct action of the environment ; now there is a large body of evidence, and your case of the Saturnia is one of the most remarkable of which I have heard.
Стр. 163 - Fourth law. — All that has been acquired or altered in the organization of individuals during their life is preserved by generation, and transmitted to new individuals which proceed from those which have undergone these changes.
Стр. 279 - The solution, as I believe, is that the modified offspring of all dominant and increasing forms tend to become adapted to many and highly diversified places in the economy of nature.