 As natural selection acts solely by the preservation of profitable modifications, each new form will tend in a fully-stocked country to take the place of, and finally to exterminate, its own less improved parent-form and other less-favoured forms with...  The Philosophy of Evolution - Página 109por Benjamin Thompson Lowne - 1873 - 159 páginasVista completa - Acerca de este libro
 | 1861 - 824 páginas
...throngh millions of ages, he attempts to evade, but in our judgment without any even apparent success. He says : " As natural selection acts solely by the...the place of, and finally to exterminate, its own less improved parent or other less favored forms with which it oomes in competition. Thus extinction... | |
 | Charles Darwin - 1861 - 470 páginas
...Instinct and Hybridism in separate chapters. On the absence or rarity of transitional varieties. — As natural selection acts solely by the preservation...profitable modifications, each new form will tend in a fullystocked country to take the place of, and finally to exterminate, its own less improved parent... | |
 | Charles Darwin - 1864 - 472 páginas
...Instinct and Hybridism in separate chapters. On the absence or rarity of transitional varieties. — As natural selection acts solely by the preservation...profitable modifications, each new form will tend in a fullystocked country to take the place of, and finally to exterminate, its own less improved parent... | |
 | Charles Darwin - 1870 - 468 páginas
...Hybridism in separate chapters. On the absence or rarity of transitional varieties. — As uatural selection acts solely by the preservation of profitable modifications, each new form will tend fn a fullystocked country to take the place of, and finally to exterminate, its own less improved parent... | |
 | Charles Darwin - 1873 - 492 páginas
...Hybridism in the two succeeding chapters. On the Absence or Earity of Transitional Varieties.—As natural selection acts solely by the preservation...profitable modifications, 'each new form will tend in a fully-stocked country to take the place of, and finally to exterminate, its own less improved parent-form... | |
 | 1889 - 514 páginas
...species as having descended from some unknown forms; that natural selection acts slowly by preserving profitable modifications. "Each new form will tend...stocked country to take the place of, and finally exterminate, its own less improved parent-form, and other less favored forms with which it comes in... | |
 | Charles Darwin - 1896 - 408 páginas
...and Hybridism in the two succeeding chapters. On the Absence or Rarity of Transitional Varieties. — As natural selection acts solely by the preservation...profitable modifications, each new form will tend in a fully-stocked country to take the place of, and finally to exterminate, its own less improved parent-form... | |
 | Charles Darwin - 1896 - 406 páginas
...and Hybridism in the two succeeding chapters. On the Absence or Rarity of Transitional Varieties. — As natural selection acts solely by the preservation...profitable modifications, each new form will tend in a fully-stocked country to take the place of, and finally to exterminate, its own less improved parent-form... | |
 | Charles Darwin - 1909 - 584 páginas
...and Hybridism in the two succeeding chapters. On the Absence or Rarity of Transitional Varieties. — As natural selection acts solely by the preservation...profitable modifications, each new form will tend in a fully-stocked _country to take the place of, and finally to exterminate, its own less improved parent-form... | |
 | Lucius Moody Bristol - 1915 - 382 páginas
...first difficulty is concerning " the absence or rarity of transitional varieties," and his answer is: " As natural selection acts solely by the preservation...profitable modifications, each new form will tend in a fully-stocked country to take the place of, and finally to exterminate, its own less improved parent-form... | |
| |
