On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeH. Milford, 1914 - 454페이지 |
도서 본문에서
88개의 결과 중 1 - 3개
97 페이지
... less severe , are there will have been less modification and less extas mination . Hence , perhaps , it comes that the florand Madeira , according to Oswald Heer , resembles be extinct tertiary flora of Europe . All fresh - water basver ...
... less severe , are there will have been less modification and less extas mination . Hence , perhaps , it comes that the florand Madeira , according to Oswald Heer , resembles be extinct tertiary flora of Europe . All fresh - water basver ...
155 페이지
... less improved parent or other less- favoured forms with which it comes into competition . Thus extinction and natural selection will , as we have seen , go hand in hand . Hence , if we look at each species as descended from some other ...
... less improved parent or other less- favoured forms with which it comes into competition . Thus extinction and natural selection will , as we have seen , go hand in hand . Hence , if we look at each species as descended from some other ...
381 페이지
... less variable than the shape or colour of the body , etc .; whereas with sheep the horns are much less serviceable , because less constant . In classing varieties , I apprehend if we had a real pedigree , a genealogical classification ...
... less variable than the shape or colour of the body , etc .; whereas with sheep the horns are much less serviceable , because less constant . In classing varieties , I apprehend if we had a real pedigree , a genealogical classification ...
기타 출판본 - 모두 보기
자주 나오는 단어 및 구문
accumulated adapted affinities allied species America amount analogous ancient appear Archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence doubt embryo endemic Europe existing exterminated extinct extremely facts favourable 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 land larvæ less living males mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest occasional oceanic islands offspring organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive suppose tend theory tion trees variability variation vary whole widely