The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for LifeP.F. Collier & son, 1902 - 356페이지 |
도서 본문에서
100개의 결과 중 1 - 5개
3 페이지
... known Origin of our Domestic Productions - Circumstances favora- ble to Man's power of Selection . 81 CHAPTER II VARIATION UNDER NATURE Variability - Individual differences - Doubtful species - Wide ranging , much diffused , and common ...
... known Origin of our Domestic Productions - Circumstances favora- ble to Man's power of Selection . 81 CHAPTER II VARIATION UNDER NATURE Variability - Individual differences - Doubtful species - Wide ranging , much diffused , and common ...
15 페이지
... known paper ( " Edinburgh Philosophical Jour- nal , " vol . xiv . page 283 ) on the Spongilla , clearly de- clares his belief that species are descended from other species , and that they become improved in the course of modification ...
... known paper ( " Edinburgh Philosophical Jour- nal , " vol . xiv . page 283 ) on the Spongilla , clearly de- clares his belief that species are descended from other species , and that they become improved in the course of modification ...
21 페이지
... . Dalton , likewise , in Pander and Dalton's work on Fossil Sloths , expressed , in 1821 , a similar belief . Similar views have , as is well known , been maintained In 1853 a celebrated geologist , Count Keyserling ( “ HISTORICAL SKETCH ...
... . Dalton , likewise , in Pander and Dalton's work on Fossil Sloths , expressed , in 1821 , a similar belief . Similar views have , as is well known , been maintained In 1853 a celebrated geologist , Count Keyserling ( “ HISTORICAL SKETCH ...
31 페이지
... known Origin of our Domestic Productions - Circumstances favora ble to Man's power of Selection WHE Causes of Variability HEN we compare the individuals of the same variety or sub - variety of our older cultivated plants and animals ...
... known Origin of our Domestic Productions - Circumstances favora ble to Man's power of Selection WHE Causes of Variability HEN we compare the individuals of the same variety or sub - variety of our older cultivated plants and animals ...
35 페이지
... They occur rarely under nature , but are far from rare under culture . As a single bud out of the many thousands , produced year after year on the V same tree under uniform conditions , has been known sud- VARIATION UNDER DOMESTICATION 35.
... They occur rarely under nature , but are far from rare under culture . As a single bud out of the many thousands , produced year after year on the V same tree under uniform conditions , has been known sud- VARIATION UNDER DOMESTICATION 35.
기타 출판본 - 모두 보기
자주 나오는 단어 및 구문
adapted admit affinities allied species America analogous ancient animals appear beak become bees believe belonging birds breeds cause cells characters climate closely allied color common continent crossed crustaceans degree developed difficulty distinct species domestic doubt eggs embryo existing extinct extremely facts favorable fertility flowers formation forms fossil Fritz Müller genera genus geological Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner marsupial migration modification modified descendants natural selection naturalists nearly nest offspring organs ORIGIN OF SPECIES paleozoic parent peculiar perfect pigeon pistil plants pollen present principle probably produced progenitor quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder theory tion trees variability variations varieties vary whole wings young