The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1920 - 432페이지 |
도서 본문에서
100개의 결과 중 1 - 5개
vi 페이지
... common parent - Explains the grouping of all organic beings - Advance in organisation - Low forms preserved - Convergence of Character- Indefinite multiplication of species - Summary 57 CHAPTER V. LAWS OF VARIATION . Effects of changed ...
... common parent - Explains the grouping of all organic beings - Advance in organisation - Low forms preserved - Convergence of Character- Indefinite multiplication of species - Summary 57 CHAPTER V. LAWS OF VARIATION . Effects of changed ...
13 페이지
... common cattle , may , indeed , be looked upon as established by the admirable researches of Professor Rütimeyer . With respect to horses , from reasons which I cannot here give , I am doubtfully inclined to believe , in opposition to ...
... common cattle , may , indeed , be looked upon as established by the admirable researches of Professor Rütimeyer . With respect to horses , from reasons which I cannot here give , I am doubtfully inclined to believe , in opposition to ...
15 페이지
... common tumbler has the singular inherited habit of flying at a great height in a compact flock , and tumbling in the air head over heels . The runt is a bird of great size , with long massive beak and large feet ; some of the sub ...
... common tumbler has the singular inherited habit of flying at a great height in a compact flock , and tumbling in the air head over heels . The runt is a bird of great size , with long massive beak and large feet ; some of the sub ...
16 페이지
... common opinion of naturalists is correct , namely , that all are descended from the rock - pigeon ( Columba livia ) , including under this term several geographical races or sub - species , which differ from each other in the most ...
... common opinion of naturalists is correct , namely , that all are descended from the rock - pigeon ( Columba livia ) , including under this term several geographical races or sub - species , which differ from each other in the most ...
20 페이지
... common parent , as any naturalist could in coming to a similar conclusion in regard to the many species of finches , or other groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of ...
... common parent , as any naturalist could in coming to a similar conclusion in regard to the many species of finches , or other groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of ...
기타 출판본 - 모두 보기
자주 나오는 단어 및 구문
accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely fact favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase 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 occasionally oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young