The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeJohn Murray, Albemarle Street., 1891 - 432페이지 |
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83개의 결과 중 1 - 5개
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 ...
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 ...
12 페이지
... believe , as we shall presently see , that the whole amount of difference between the several breeds of the dog has been produced under domestication ; I believe that a small part of the difference is due to their being descended from ...
... believe , as we shall presently see , that the whole amount of difference between the several breeds of the dog has been produced under domestication ; I believe that a small part of the difference is due to their being descended from ...
13 페이지
... believe that barbarian man existed at an enormously remote period ; and we know that at the present day there is hardly a tribe so barbarous , as not to have domesticated at least the dog . The origin of most of our domestic animals ...
... believe that barbarian man existed at an enormously remote period ; and we know that at the present day there is hardly a tribe so barbarous , as not to have domesticated at least the dog . The origin of most of our domestic animals ...
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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 facts 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 occur 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