The Law of Heredity: A Study of the Cause of Variation, and the Origin of Living OrganismsJ. Murphy, 1883 - 336페이지 |
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10 페이지
... ancestor . An interesting illustration of this law is the occasional appearance in horses of stripes on the body and legs . Such stripes are not usually present in the horse , al- though Darwin has given reasons for believing that our ...
... ancestor . An interesting illustration of this law is the occasional appearance in horses of stripes on the body and legs . Such stripes are not usually present in the horse , al- though Darwin has given reasons for believing that our ...
17 페이지
... ancestors , although it may be quite different from its immediate ancestor , as in cases of alternation . 6. Organisms produced from fertilized ova differ in the following points from those produced asexually : a . As a rule the ...
... ancestors , although it may be quite different from its immediate ancestor , as in cases of alternation . 6. Organisms produced from fertilized ova differ in the following points from those produced asexually : a . As a rule the ...
26 페이지
... ancestor . Microscopic examina- tion cannot overthrow this hypothesis , for a failure to discover these organic particles with any particular mag- nifying power does not , of course , disprove their existence any more than a failure to ...
... ancestor . Microscopic examina- tion cannot overthrow this hypothesis , for a failure to discover these organic particles with any particular mag- nifying power does not , of course , disprove their existence any more than a failure to ...
29 페이지
... ancestor a species which had not yet acquired the distinctive features of either of them ; that a little farther back we trace this species to an ancestor with still wider relationships . Every day the evidence grows stronger to show ...
... ancestor a species which had not yet acquired the distinctive features of either of them ; that a little farther back we trace this species to an ancestor with still wider relationships . Every day the evidence grows stronger to show ...
30 페이지
... ancestor , a satisfactory ex- planation of the ontogenetic development of the indi- vidual horse from an unicellular ... ancestors of the organism in question have passed through in the course of many million years . To - day , when we ...
... ancestor , a satisfactory ex- planation of the ontogenetic development of the indi- vidual horse from an unicellular ... ancestors of the organism in question have passed through in the course of many million years . To - day , when we ...
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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