The Origin of Species by Means of Natural Selection; Or, the Preservation of Favored Races in the Struggle for Life ...A.L. Burt, 1890 - 538페이지 |
도서 본문에서
67개의 결과 중 1 - 3개
248 페이지
... successive generations made tumblers what they now are ; and near Glasgow there are house - tumblers , as I hear from Mr. Brent , which can not fly eighteen inches high without going head over heels . It may be doubted whether any one ...
... successive generations made tumblers what they now are ; and near Glasgow there are house - tumblers , as I hear from Mr. Brent , which can not fly eighteen inches high without going head over heels . It may be doubted whether any one ...
317 페이지
... successive formations in different parts of Great Britain ; and this is the result : Paleozoic strata ( not including igneous beds ) ... Secondary strata . Tertiary strata ... Feet . 57,154 13,190 2,240 -making altogether 72,584 feet ...
... successive formations in different parts of Great Britain ; and this is the result : Paleozoic strata ( not including igneous beds ) ... Secondary strata . Tertiary strata ... Feet . 57,154 13,190 2,240 -making altogether 72,584 feet ...
463 페이지
... successive variations having supervened in the several species at a not early age , and having been inherited at a corresponding age , the young will have been but little modified , and they will still resemble each other much more ...
... successive variations having supervened in the several species at a not early age , and having been inherited at a corresponding age , the young will have been but little modified , and they will still resemble each other much more ...
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 gilt top Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate 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 variability variations varieties vary whole widely different wings young