The Law of Heredity: A Study of the Cause of Variation, and the Origin of Living OrganismsJ. Murphy, 1883 - 336페이지 |
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7 페이지
... tion of the amount of knowledge required . We regard an adult animal with feelings similar to those with which an intelligent savage might regard a telephone or a steamboat . A dog , with all the powers and faculties which enable him to ...
... tion of the amount of knowledge required . We regard an adult animal with feelings similar to those with which an intelligent savage might regard a telephone or a steamboat . A dog , with all the powers and faculties which enable him to ...
12 페이지
... tion , the means which have unlocked for us so many of the secrets of inorganic nature , are equally useful in this field ; that the adaptations of nature may be studied and understood like a problem in astronomy or physics . The aim of ...
... tion , the means which have unlocked for us so many of the secrets of inorganic nature , are equally useful in this field ; that the adaptations of nature may be studied and understood like a problem in astronomy or physics . The aim of ...
14 페이지
... tion of such variations as chance to appear , and until we know the laws which govern the appearance of variations it must be impossible to decide how far the course of or- ganic evolution has been determined by these unknown laws , and ...
... tion of such variations as chance to appear , and until we know the laws which govern the appearance of variations it must be impossible to decide how far the course of or- ganic evolution has been determined by these unknown laws , and ...
15 페이지
... tion for the theory of natural selection , and removes the most serious difficulties which have been urged against the latter theory . I shall then show that there is no a priori reason for rejecting the theory of heredity ; and that it ...
... tion for the theory of natural selection , and removes the most serious difficulties which have been urged against the latter theory . I shall then show that there is no a priori reason for rejecting the theory of heredity ; and that it ...
17 페이지
... tion of the species . An organism formed asexually trav- erses only so much of this path as remains to be traversed by the organism which gives birth to it . b . Reversion , or the appearance of characteristics not exhibited by the ...
... tion of the species . An organism formed asexually trav- erses only so much of this path as remains to be traversed by the organism which gives birth to it . b . Reversion , or the appearance of characteristics not exhibited by the ...
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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