On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeMurray, 1860 - 502페이지 |
도서 본문에서
39개의 결과 중 1 - 5개
123 페이지
... families . Thus it is , as I believe , that two or more genera are produced by descent with modification , from two or more species of the same genus . And the two or more parent - species are supposed to have descended from G 2 CHAP ...
... families . Thus it is , as I believe , that two or more genera are produced by descent with modification , from two or more species of the same genus . And the two or more parent - species are supposed to have descended from G 2 CHAP ...
124 페이지
... families , or genera , with those now living , yet are often , in some degree , intermediate in character between existing groups ; and we can understand this fact , for the extinct species lived at very ancient epochs when the 124 CHAP ...
... families , or genera , with those now living , yet are often , in some degree , intermediate in character between existing groups ; and we can understand this fact , for the extinct species lived at very ancient epochs when the 124 CHAP ...
125 페이지
... families , or even orders , according to the amount of divergent modification supposed to be represented in the diagram . And the two new families , or orders , will have descended from two species of the original genus ; and these two ...
... families , or even orders , according to the amount of divergent modification supposed to be represented in the diagram . And the two new families , or orders , will have descended from two species of the original genus ; and these two ...
126 페이지
... families , orders , and classes , as at the present day . Summary of Chapter . - If during the long course of ages and under varying conditions of life , organic beings vary at all in the several parts of their organisation 126 CHAP ...
... families , orders , and classes , as at the present day . Summary of Chapter . - If during the long course of ages and under varying conditions of life , organic beings vary at all in the several parts of their organisation 126 CHAP ...
128 페이지
... sections and sub - genera , spe- cies of distinct genera much less closely related , and genera related in different degrees , forming sub - fami- lies , families , orders , sub - classes , 128 CHAP . IV . NATURAL SELECTION .
... sections and sub - genera , spe- cies of distinct genera much less closely related , and genera related in different degrees , forming sub - fami- lies , families , orders , sub - classes , 128 CHAP . IV . NATURAL SELECTION .
기타 출판본 - 모두 보기
자주 나오는 단어 및 구문
accumulated adapted affinities allied species America amount analogous ancient animals appear become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo Europe existing exterminated extinct extremely facts favourable Fcap fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons plants pollen present probably produced progenitor racters ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely