The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1920 - 432페이지 |
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100개의 결과 중 1 - 5개
xiv 페이지
... believe that existing species are now undergoing modifica- tion ; and , as his son adds , " C'est donc un problème à réserver * I have taken the date of the first publication of Lamarck from Isid . Geoffroy Saint - Hilaire's ( Hist ...
... believe that existing species are now undergoing modifica- tion ; and , as his son adds , " C'est donc un problème à réserver * I have taken the date of the first publication of Lamarck from Isid . Geoffroy Saint - Hilaire's ( Hist ...
xx 페이지
... believe in the modification of species , or at least disbelieve in separate acts of creation , twenty - seven have written on special branches of natural history or geology . tion , that forms now perfectly distinct have descended from ...
... believe in the modification of species , or at least disbelieve in separate acts of creation , twenty - seven have written on special branches of natural history or geology . tion , that forms now perfectly distinct have descended from ...
4 페이지
... believe , the future success and modification of every inhabitant of this world . Still less do we know of the mutual relations of the innumerable inhabitants of the world during the many past geological epochs in its history . Although ...
... believe , the future success and modification of every inhabitant of this world . Still less do we know of the mutual relations of the innumerable inhabitants of the world during the many past geological epochs in its history . Although ...
8 페이지
... believe that long limbs are almost always accompanied by an elongated head . Some instances of correlation are quite whimsical : thus cats which are entirely white and have blue eyes are generally deaf ; but it has been lately stated by ...
... believe that long limbs are almost always accompanied by an elongated head . Some instances of correlation are quite whimsical : thus cats which are entirely white and have blue eyes are generally deaf ; but it has been lately stated by ...
10 페이지
... believe that the rule has a wider extension , and that , when there is no apparent reason why a peculiarity should appear at any particular age , yet that it does tend to appear in the offspring at the same period at which it first ...
... believe that the rule has a wider extension , and that , when there is no apparent reason why a peculiarity should appear at any particular age , yet that it does tend to appear in the offspring at the same period at which it first ...
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accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely fact favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young