The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for LifeP.F. Collier & son, 1902 - 356페이지 |
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4 페이지
... inhabitants of any small area , and to naturalization - Action of Natural Selection , through Divergence of Character , and Extinction , on the descendants from a common parent - Explains the grouping of all organic beings - Advance in ...
... inhabitants of any small area , and to naturalization - Action of Natural Selection , through Divergence of Character , and Extinction , on the descendants from a common parent - Explains the grouping of all organic beings - Advance in ...
14 페이지
... inhabitants of the middle re- gions of Africa , some one would be better fitted than the others to bear the diseases of the country . This race would consequently multiply , while the others would decrease ; not only from their ...
... inhabitants of the middle re- gions of Africa , some one would be better fitted than the others to bear the diseases of the country . This race would consequently multiply , while the others would decrease ; not only from their ...
25 페이지
... inhabitants of that continent . These facts , as will be seen in the later chapters of this volume , seemed to throw some light on the origin of species - that mystery of mysteries , as it has been called by one of our greatest phi ...
... inhabitants of that continent . These facts , as will be seen in the later chapters of this volume , seemed to throw some light on the origin of species - that mystery of mysteries , as it has been called by one of our greatest phi ...
30 페이지
... 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 much remains obscure , and will long remain obscure ...
... 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 much remains obscure , and will long remain obscure ...
44 페이지
... inhabitants of Switzerland cultivated several kinds of wheat and barley , the pea , the poppy for oil , and flax ; and they possessed several domesticated animals . They also carried on com- merce with other nations . All this clearly ...
... inhabitants of Switzerland cultivated several kinds of wheat and barley , the pea , the poppy for oil , and flax ; and they possessed several domesticated animals . They also carried on com- merce with other nations . All this clearly ...
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adapted admit affinities allied species America analogous ancient animals appear beak become bees believe belonging birds breeds cause cells characters climate closely allied color common continent crossed crustaceans degree developed difficulty distinct species domestic doubt eggs embryo existing extinct extremely facts favorable fertility flowers formation 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 marsupial migration modification modified descendants natural selection naturalists nearly nest offspring organs ORIGIN OF SPECIES paleozoic parent peculiar perfect pigeon pistil plants pollen present principle probably produced progenitor quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder theory tion trees variability variations varieties vary whole wings young