The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJohn Murray, 1890 - 458페이지 |
도서 본문에서
73개의 결과 중 1 - 3개
158 페이지
Reprinted from the Sixth London Edition Charles Darwin. CHAPTER VI . DIFFICULTIES OF THE THEORY . Difficulties of the theory of descent with modification - Absence or rarity of transitional varieties - Transitions in habits of life ...
Reprinted from the Sixth London Edition Charles Darwin. CHAPTER VI . DIFFICULTIES OF THE THEORY . Difficulties of the theory of descent with modification - Absence or rarity of transitional varieties - Transitions in habits of life ...
197 페이지
... theory of natural selection we can clearly under- stand the full meaning of that old canon in natural history , " Natura non facit saltum . " This canon , if we look to the present inhabitants alone of the world , is not strictly cor ...
... theory of natural selection we can clearly under- stand the full meaning of that old canon in natural history , " Natura non facit saltum . " This canon , if we look to the present inhabitants alone of the world , is not strictly cor ...
482 페이지
... theory , few will be inclined to admit . If we look to long enough intervals of time , geology plainly declares that species have all changed ; and they have changed in the manner required by the theory , for they have changed slowly ...
... theory , few will be inclined to admit . If we look to long enough intervals of time , geology plainly declares that species have all changed ; and they have changed in the manner required by the theory , for they have changed slowly ...
기타 출판본 - 모두 보기
자주 나오는 단어 및 구문
adapted admit affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied color continued crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favorable females fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate intervals kind lamellæ larvæ less living male mammals manner marsupials migration modified descendants natural selection naturalists nearly nest oceanic islands offspring organs parent peculiar perfect pigeons pistil pollen present principle probably produced quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive suppose tend theory tion trees variability variations varieties vary whole widely different wings young