The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for LifeWerner Company, Book Manufacturers, 1900 - 538페이지 |
도서 본문에서
12개의 결과 중 1 - 3개
168 페이지
... quadrupeds . We may believe that the progenitor of the ostrich genus had habits like those of the bustard , and that , as the size and weight of its body were in- creased during successive generations , its legs were used more , and its ...
... quadrupeds . We may believe that the progenitor of the ostrich genus had habits like those of the bustard , and that , as the size and weight of its body were in- creased during successive generations , its legs were used more , and its ...
240 페이지
... quadrupeds , and by being fur- nished with wings and plumes , as different in shape as they are elegant in structure , so as to be wafted by every breeze . I will give one other instance ; for this subject of the same end being gained ...
... quadrupeds , and by being fur- nished with wings and plumes , as different in shape as they are elegant in structure , so as to be wafted by every breeze . I will give one other instance ; for this subject of the same end being gained ...
245 페이지
... quadrupeds , which , from being correlated with consti- tutional differences or from determining the attacks of insects , might assuredly be acted on by natural se- lection . The tail of the giraffe looks like an artifi- cially ...
... quadrupeds , which , from being correlated with consti- tutional differences or from determining the attacks of insects , might assuredly be acted on by natural se- lection . The tail of the giraffe looks like an artifi- cially ...
기타 출판본 - 모두 보기
자주 나오는 단어 및 구문
adapted advantage allied animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree descendants developed difficulty distinct species disuse domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important improved increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young