The Law of Heredity: A Study of the Cause of Variation, and the Origin of Living OrganismsJ. Murphy, 1883 - 336페이지 |
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43개의 결과 중 1 - 5개
9 페이지
... bird . If there is no mystery in the performance by the com- plicated organs of an adult animal of all its complicated functions , what shall we say when we find the power to perform these functions existing in a latent state in the egg ...
... bird . If there is no mystery in the performance by the com- plicated organs of an adult animal of all its complicated functions , what shall we say when we find the power to perform these functions existing in a latent state in the egg ...
21 페이지
... bird . Thus an organized individual " is a composite body consisting of the original or elementary parts , and of the matters . which have been associated with them by the aid of nu- trition , " so that if these matters could be ...
... bird . Thus an organized individual " is a composite body consisting of the original or elementary parts , and of the matters . which have been associated with them by the aid of nu- trition , " so that if these matters could be ...
31 페이지
... bird . On the contrary , we unravel from this history the correspond- ing series of ancestral forms , which have led ... birds , but the statement that this is the case is in no sense an explanation of heredity . For that matter it is 66 ...
... bird . On the contrary , we unravel from this history the correspond- ing series of ancestral forms , which have led ... birds , but the statement that this is the case is in no sense an explanation of heredity . For that matter it is 66 ...
32 페이지
... bird's egg should give rise to a bird , and a horse - ovum to a horse , but no one would accept the statement as an ... birds from these remote an- cestors by natural selection , and the development of an individual bird from an ...
... bird's egg should give rise to a bird , and a horse - ovum to a horse , but no one would accept the statement as an ... birds from these remote an- cestors by natural selection , and the development of an individual bird from an ...
54 페이지
... Many of the secondary characteristics of the ovum , such as its great size in birds and reptiles , and the pres- ence in it of food - material in so many animals , are no doubt traceable to the fact that , in most animals 54 Heredity .
... Many of the secondary characteristics of the ovum , such as its great size in birds and reptiles , and the pres- ence in it of food - material in so many animals , are no doubt traceable to the fact that , in most animals 54 Heredity .
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acquired action adult alike allied species ancestor ancestral form asexual asexual reproduction become birds body breed characteristics color common conclusion confined crossing crustacea Daphnia Darwin Darwin says descendants domesticated animals domesticated pigeons embryo epigenesis evolution existence experience explanation fact female fertilized fortuitous fowls functions furnishes gemmules genera genus germ germinative vesicle give rise gradually greatly hereditary homology horns hybrid hydroids hypothesis individual influence inherited insects latent male cell male element males of allied medusa ment modification natural selection offspring ordinary origin origin of species ovum pangenesis parent parthenogenesis peculiarities perfect phenomena plants plastidules plumage present produced pure race reasons for believing reciprocal crosses reproductive elements resemblance result secondary sexual characters sexes sexual elements sexual reproduction sexual selection similar simply striped structure tendency to vary theory of heredity throw off gemmules tion transmission transmit true variable various young