 ... 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 123by Alfred Russel Wallace - 1878 - 356 lehteFull view - About this book
 | 1878 - 916 lehte
...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... | |
 | 1878 - 882 lehte
...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... | |
 | 1879 - 972 lehte
...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... | |
 | Alfred Russel Wallace - 1891 - 516 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,... | |
 | Henry Mills Alden, Frederick Lewis Allen, Lee Foster Hartman, Thomas Bucklin Wells - 1879 - 976 lehte
...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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