The Origin of Species by Means of Natural Selection Or, The Preservation of Favored Races in the Struggle for LifeD. Appleton and Company, 1882 - 458ÆäÀÌÁö |
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... considered . 214 The statement with respect to young cuckoos ejecting their foster - brothers confirmed . 268 270 307 240 319 248 215 326 252 377 284 402 301 440 328 343 463 505 516 382 373 518 384 520 385 521 387 541 547 401 405 552 ...
... considered . 214 The statement with respect to young cuckoos ejecting their foster - brothers confirmed . 268 270 307 240 319 248 215 326 252 377 284 402 301 440 328 343 463 505 516 382 373 518 384 520 385 521 387 541 547 401 405 552 ...
2 ÆäÀÌÁö
... considering the Origin of Species , it is quite conceivable that a naturalist , reflecting on the mutual affinities of organic beings , on their embryological relations , their geographical distribution , geological succession , and ...
... considering the Origin of Species , it is quite conceivable that a naturalist , reflecting on the mutual affinities of organic beings , on their embryological relations , their geographical distribution , geological succession , and ...
3 ÆäÀÌÁö
... considered . This is the doctrine of Malthus , applied to the whole animal and vegetable kingdoms . As many more individuals of each species are born than can possibly survive ; and as , consequently , there is a frequently recurring ...
... considered . This is the doctrine of Malthus , applied to the whole animal and vegetable kingdoms . As many more individuals of each species are born than can possibly survive ; and as , consequently , there is a frequently recurring ...
6 ÆäÀÌÁö
... considered as definite when all or nearly all the offspring of individuals exposed to certain conditions during several generations are modified in the same manner . It is extremely difficult to come to any conclusion in regard to the ...
... considered as definite when all or nearly all the offspring of individuals exposed to certain conditions during several generations are modified in the same manner . It is extremely difficult to come to any conclusion in regard to the ...
17 ÆäÀÌÁö
... considering their size , habits , and remark- able characters , seems improbable ; or they must have become extinct in the wild state . But birds breeding on precipices , and good fliers , are unlikely to be exterminated ; and the ...
... considering their size , habits , and remark- able characters , seems improbable ; or they must have become extinct in the wild state . But birds breeding on precipices , and good fliers , are unlikely to be exterminated ; and the ...
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adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formations formerly 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 lamell©¡ larv©¡ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed theory tion variability variations varieties vary whilst whole wings young