Organic Evolution: A Text-bookMacmillan, 1917 - Всего страниц: 729 |
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Стр. 58
... habitat . " Porites limosa flourishes in muddy water and Astræa bowerbanki does not seem to mind mud or sediment , or even muddy brackish water , growing on , and incrusting the stones at the mouth of the Mangrove Creek , Australia ...
... habitat . " Porites limosa flourishes in muddy water and Astræa bowerbanki does not seem to mind mud or sediment , or even muddy brackish water , growing on , and incrusting the stones at the mouth of the Mangrove Creek , Australia ...
Стр. 75
... habitat of the young indicating to us the ancestral home of the species . Another land crab , Cenobita diogenes , is one of the hermit crabs which utilize the cast - off shell of some gastropod for the protection of their otherwise ...
... habitat of the young indicating to us the ancestral home of the species . Another land crab , Cenobita diogenes , is one of the hermit crabs which utilize the cast - off shell of some gastropod for the protection of their otherwise ...
Стр. 77
... habitat . Of mammals , the seals , whales , and Sirenia or sea - cows are in- stances of permanent seaward migration , possibly by way of the terrestrial rivers or estuaries . The resultant modifications of these as well as of certain ...
... habitat . Of mammals , the seals , whales , and Sirenia or sea - cows are in- stances of permanent seaward migration , possibly by way of the terrestrial rivers or estuaries . The resultant modifications of these as well as of certain ...
Стр. 80
... habitat in their ancestral migration from land to sea . This , however , can not be proved , although the sup- position that they were at least estuary - inhabiting forms before taking to the high seas is certainly plausible . Temporary ...
... habitat in their ancestral migration from land to sea . This , however , can not be proved , although the sup- position that they were at least estuary - inhabiting forms before taking to the high seas is certainly plausible . Temporary ...
Стр. 83
... habitats , or the withdrawal of the waters and the formation of new land - bridges or the resurrection of those which formerly existed but which have been temporarily de- stroyed . It will be readily seen how profound an influence upon ...
... habitats , or the withdrawal of the waters and the formation of new land - bridges or the resurrection of those which formerly existed but which have been temporarily de- stroyed . It will be readily seen how profound an influence upon ...
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Часто встречающиеся слова и выражения
adaptation adaptive radiation adult aërial Africa amphibia ancestral ancient animals aquatic aquatic adaptation arboreal become birds body bones camel carnivorous cave cells Chapter characteristics characters climate color comparable creatures Cretaceous cursorial Darwin desert developed digits dinosaurs elephant elongated entire Eocene epigean evidence evolution evolutionary existence extinct fauna feet female fins fishes flight flying foot fore forms fossil fossorial genera genus geologic gills habitat hand hence hind limbs horse ichthyosaurs increase insects instance known land larvæ later living lizards lower male mammals marine marsupials mastodons Mesozoic migration Miocene modification molars muscles Museum natural selection North America notochord Oligocene organs origin Osborn pair Paleozoic parasitic patagium plants Pleistocene Pliocene primitive proboscidean protoplasm race realm reptiles sexual shell skeleton skull species structure surface tail teeth terrestrial theory tion tooth trees true tusks types ungulates upper variation vertebrates whales wings
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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. 3 - The result, therefore, of this physical inquiry is, that we find no vestige of a beginning, — no prospect of an end"§.
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. 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.
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. 16 - The world has been evolved, not created; it has arisen little by little from a small beginning, and has increased through the activity of the elemental forces embodied in itself, and so has rather grown than suddenly come into being at an almighty word. What a sublime idea of the infinite might of the great Architect! the Cause of all causes, the Father of all fathers, the Ens entium! For if we could compare the Infinite it would surely require a greater Infinite to cause the causes of effects than...
Стр. 655 - 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. 348 - I believe that albatrosses move their wings much oftener than is suspected. They often have the appearance of soaring for long periods after a ship without flapping their wings at all, but if they be very closely watched, very short but extremely quick motions of the wings may be detected. The appearance is rather as if the body of the bird dropped a very short distance and rose again. The movements cannot be seen at all unless the bird is exactly on a level with the eye. A very quick stroke, carried...