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Raamatud Books 1 - 5 of 5 on ... while in the temperate regions there have been a series of periodical checks....
" ... while in the temperate regions there have been a series of periodical checks and extinctions of a more or less disastrous nature, necessitating the commencement of the work of development in certain lines over and over again. In the one, evolution... "
Tropical Nature, and Other Essays - Page 123
by Alfred Russel Wallace - 1878 - 356 lehte
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The American Naturalist

1878
...the tropics, "evolution has had a fair chance" while in the Temperate Zone, with its glacial periods, "it has had countless difficulties thrown in its way....function, and of instinct — that rich variety of color, and that nicely balanced harmony of relations, which delight and astonish us in the animal productions...
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The American Naturalist

1878
...the tropics, "evolution has had a fair chance" while in the Temperate Zone, with its glacial peiiods, "it has had countless difficulties thrown in its way....resulted in those infinitely varied and beautiful forms—those wonderful eccentricities of structure, of function, and of instinct—that rich variety...
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Harper's Magazine, 58. köide

1879
...tropics " evolution has had a fair chance," while in the temperate zone, with its glacial periods, "it has had countless difficulties thrown in its way....of function, and of instinct, that rich variety of color, and that nicely balanced harmony of relations which delight and astonish us in the animal productions...
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Natural Selection and Tropical Nature: Essays on Descriptive and Theoretical ...

Alfred Russel Wallace - 1891 - 492 lehte
...thrown in its way. The equatorial regions are then, as regards their past and present life-history, a more ancient world than that represented by the...a world in which the laws which have governed the progress^ ive development of life have operated with comparatively little check for countless ages,...
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Harper's Magazine, 58. köide

1879
...tropics " evolution has had a fair chance," while in the temperate zone, with its glacial periods, " it has had countless difficulties thrown in its way....of function, and of instinct, that rich variety of color, and that nicely balanced harmony of relations which delight and astonish ua in the animal productions...
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