The Origin of Species by Means of Natural Selection Or, The Preservation of Favored Races in the Struggle for LifeD. Appleton and Company, 1882 - 458페이지 |
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viii 페이지
... period - Alternate Glacial periods in the north and south 316-342 CHAPTER XIII . GEOGRAPHICAL DISTRIBUTION - continued . Distribution of fresh - water productions islands - -- On the inhabitants of oceanic Absence of Batrachians and of ...
... period - Alternate Glacial periods in the north and south 316-342 CHAPTER XIII . GEOGRAPHICAL DISTRIBUTION - continued . Distribution of fresh - water productions islands - -- On the inhabitants of oceanic Absence of Batrachians and of ...
xii 페이지
... period of reproduction . The account of the electric organ of fishes added to . Analogical resemblance between the eyes of Cephalopods and Vertebrates . Claparède on the analogical resemblance of the hair - claspers of the Acarida . The ...
... period of reproduction . The account of the electric organ of fishes added to . Analogical resemblance between the eyes of Cephalopods and Vertebrates . Claparède on the analogical resemblance of the hair - claspers of the Acarida . The ...
10 페이지
... period of life a peculiarity first appears , it tends to re - appear in the offspring at a corresponding age , though some- times earlier . In many cases this could not be otherwise ; thus the inherited peculiarities in the horns of ...
... period of life a peculiarity first appears , it tends to re - appear in the offspring at a corresponding age , though some- times earlier . In many cases this could not be otherwise ; thus the inherited peculiarities in the horns of ...
13 페이지
... period than has hitherto been supposed . The lake - inhabitants of Swit- zerland cultivated several kinds of wheat and barley , the pea , the poppy for oil , and flax ; and they possessed several domesticated animals . They also carried ...
... period than has hitherto been supposed . The lake - inhabitants of Swit- zerland cultivated several kinds of wheat and barley , the pea , the poppy for oil , and flax ; and they possessed several domesticated animals . They also carried ...
14 페이지
Charles Darwin. 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 will probably ...
Charles Darwin. 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 will probably ...
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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 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 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