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
53개의 결과 중 1 - 3개
62 페이지
... sometimes according to age or development , sometimes without any assignable reason . Such characters are not of course of specific value , but they are , as Asa Gray has remarked in commenting on this memoir , such as generally enter ...
... sometimes according to age or development , sometimes without any assignable reason . Such characters are not of course of specific value , but they are , as Asa Gray has remarked in commenting on this memoir , such as generally enter ...
200 페이지
... sometimes double and sometimes treble , is common ; the side of the face , moreover , is sometimes striped . The stripes are often plainest in the foal ; and some- times quite disappear in old horses . Colonel Poole has seen both gray ...
... sometimes double and sometimes treble , is common ; the side of the face , moreover , is sometimes striped . The stripes are often plainest in the foal ; and some- times quite disappear in old horses . Colonel Poole has seen both gray ...
220 페이지
... sometimes , like a shrike , kills small birds by blows on the head ; and I have many times seen and heard it hammering the seeds of the yew on a branch , and thus breaking them like a nuthatch . In North America the black bear was seen ...
... sometimes , like a shrike , kills small birds by blows on the head ; and I have many times seen and heard it hammering the seeds of the yew on a branch , and thus breaking them like a nuthatch . In North America the black bear was seen ...
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