 If such do occur, can we doubt (remembering that many more individuals are born than can possibly survive) that individuals having any advantage, however slight, over others, would have the best chance of surviving and of procreating their kind ? On the...  Evolution and Adaptation - Стр. 117авторы: Thomas Hunt Morgan - 1903 - Страниц: 470Полный просмотр - Подробнее о книге
 | 1890 - Страниц: 414
...the same species has generally some effect upon the chance of life. "Can we doubt (remembering that many more individuals are born than can possibly survive)...chance of surviving and of procreating their kind ? " (' Origin of Species,' chap. iv). Of late years, another view has received support from various... | |
 | William Nelson Pendleton - 1860 - Страниц: 362
...occur in the course of thousands of generations ? If such do occur, can we doubt, remembering that many more individuals are born than can possibly survive,...procreating their kind ? On the other hand, we may be sure that any variation in the least degree injurious would be rigidly destroyed. 22 This preservation... | |
 | Richard Holt Hutton, Walter Bagehot - 1860 - Страниц: 556
...occur in the course of thousands of generations 1 If such do occur, can we doubt (remembering that many more individuals are born than can possibly survive)...others, would have the best chance of surviving, and of propagating their kind ? On the other hand, we may feel sure that any variation in the least degree... | |
 | 1860 - Страниц: 564
...thousands of generations ? If such do occur, can we doubt (remembering that many more individuals nre born than can possibly survive) that individuals having...others, would have the best chance of surviving, and of propagating their kind ? On the other hand, we may feel sure that any variatiou in the least degree... | |
 | 1860 - Страниц: 390
...sake of brevity, NATURAL SELECTION." At the beginning of the same chapter, he has added to this, " On the other hand, we • may feel sure that any variation...least degree injurious would be rigidly destroyed; " and he includes " sexual selections '*• as a powerful assistant. The theory is then based upon... | |
 | 1860 - Страниц: 982
...If such do occur, then, remembering the struggle for existence, individuals possessing any advantage over others would have the best chance of surviving and of procreating their kind, while injurious variations would be rigidly destroyed. Such a continual preservation of favorable,... | |
 | 1860 - Страниц: 532
...occur in the course of thousands of generations ? If such do occur, can we doubt (remembering that many more individuals are born than can possibly survive), that individuals having advantages however slight, over others, would have the best chance of surviving and of procreating... | |
 | Charles Darwin - 1861 - Страниц: 470
...occur in the course of thousands of generations ? If such do occur, can we doubt (remembering that many more individuals are born than can possibly survive)...least degree injurious would be rigidly destroyed. This preservation of favourable variations and the rejection of injurious variations, I call Natural... | |
 | 1861 - Страниц: 824
...sometimes occur in the course of thousands of generations? If such do occur, can we doubt (remembering that more individuals are born than can possibly survive),...others, would have the best chance of surviving and procreating their kind ? On the other hand, we may feel sure that any variations in the least degree... | |
 | Charles Darwin - 1864 - Страниц: 472
...sometimes occur in the course of thousands of generations? If such do occur, can we doubt (remembering that many more individuals are born than can possibly survive)...chance of surviving and of procreating their .kind? lOn the other hand, we may feel sure that any variation [in the least degree injurious would be rigidly... | |
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