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
62개의 결과 중 1 - 3개
205 페이지
... according to Schacht , in the nearly horizontal and in the upright branches . In the common rue and some other plants , one flower , usually the central or terminal one , opens first , and has five sepals and petals , and five divisions ...
... according to Schacht , in the nearly horizontal and in the upright branches . In the common rue and some other plants , one flower , usually the central or terminal one , opens first , and has five sepals and petals , and five divisions ...
361 페이지
... according to their mutual affinities , and in the second place according to their periods of existence - do not accord in arrangement . The species extreme in character are not the oldest or the most recent ; nor are those which are ...
... according to their mutual affinities , and in the second place according to their periods of existence - do not accord in arrangement . The species extreme in character are not the oldest or the most recent ; nor are those which are ...
425 페이지
... according to the length of time which has elapsed since the colonists entered one of the regions , or both ; according to the nature of the communication which allowed certain forms and not others to enter , either in greater or lesser ...
... according to the length of time which has elapsed since the colonists entered one of the regions , or both ; according to the nature of the communication which allowed certain forms and not others to enter , either in greater or lesser ...
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