On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, 2±ÇD. Appleton, 1888 - 458ÆäÀÌÁö |
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xii ÆäÀÌÁö
... respect to young cuckoos ejecting their foster - brothers confirmed . 268 270 307 240 215 319 248 326 252 377 284 402 301 440 328 463 343 505 373 516 On the cuckoo - like habits of the Molothrus . On fertile hybrid moths . The ...
... respect to young cuckoos ejecting their foster - brothers confirmed . 268 270 307 240 215 319 248 326 252 377 284 402 301 440 328 463 343 505 373 516 On the cuckoo - like habits of the Molothrus . On fertile hybrid moths . The ...
xiv ÆäÀÌÁö
... respect to the means of modification , he attributed something to the direct action of the physical conditions of life , something to the crossing of already existing forms , and much to use and disuse , that is , to the effects of ...
... respect to the means of modification , he attributed something to the direct action of the physical conditions of life , something to the crossing of already existing forms , and much to use and disuse , that is , to the effects of ...
xxi ÆäÀÌÁö
... respect , expressed about the year 1859 ( see Prof. Rudolph Wagner , Zoolo- gisch - Anthropologische Untersuchungen , ' 1861 , s . 51 ) his convic- tion , chiefly grounded on the laws of geographical distribution , that forms now ...
... respect , expressed about the year 1859 ( see Prof. Rudolph Wagner , Zoolo- gisch - Anthropologische Untersuchungen , ' 1861 , s . 51 ) his convic- tion , chiefly grounded on the laws of geographical distribution , that forms now ...
5 ÆäÀÌÁö
... directly on the whole organisation or on certain parts alone , and indirectly by affecting the reproductive system . With respect to the direct action , we must bear in mind that in every CHAP . 1 . Variation under Domestication .
... directly on the whole organisation or on certain parts alone , and indirectly by affecting the reproductive system . With respect to the direct action , we must bear in mind that in every CHAP . 1 . Variation under Domestication .
7 ÆäÀÌÁö
... respect to what I have called the indirect action of changed conditions , namely , through the reproductive system being affected , we may infer that variability is thus induced , partly from the fact of this system being extremely ...
... respect to what I have called the indirect action of changed conditions , namely , through the reproductive system being affected , we may infer that variability is thus induced , partly from the fact of this system being extremely ...
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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 formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number 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 tend theory tion variability variations varieties vary whilst whole wings young