The Law of Heredity: A Study of the Cause of Variation, and the Origin of Living OrganismsJ. Murphy, 1883 - 336페이지 |
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A Study of the Cause of Variation, and the Origin of Living Organisms William Keith Brooks. COPYRIGHT , 1883 , BY JOHN MURPHY & CO . ΤΟ THE MEMORY OF CHARLES DARWIN , FROM WHOSE STORE.
A Study of the Cause of Variation, and the Origin of Living Organisms William Keith Brooks. COPYRIGHT , 1883 , BY JOHN MURPHY & CO . ΤΟ THE MEMORY OF CHARLES DARWIN , FROM WHOSE STORE.
10 페이지
... Darwin has given reasons for believing that our horses are descended from a striped zebra - like ancestor . The power to revert to this ancestral form is handed down from generation to generation in the egg , and it may show itself at ...
... Darwin has given reasons for believing that our horses are descended from a striped zebra - like ancestor . The power to revert to this ancestral form is handed down from generation to generation in the egg , and it may show itself at ...
12 페이지
... Darwin's work has taught us that this is not true ; that in the law of natural selection we have at least a partial explanation of the origin of the adaptation of nature ; that while natural selection may not be the ex- clusive means by ...
... Darwin's work has taught us that this is not true ; that in the law of natural selection we have at least a partial explanation of the origin of the adaptation of nature ; that while natural selection may not be the ex- clusive means by ...
47 페이지
... Darwin's pangenesis hypothesis - This is an evolution hypothe- sis , since all the characteristics of the adult are supposed to be latent in the germ - Miscellaneous objections to it - These objections do not show that it conflicts with ...
... Darwin's pangenesis hypothesis - This is an evolution hypothe- sis , since all the characteristics of the adult are supposed to be latent in the germ - Miscellaneous objections to it - These objections do not show that it conflicts with ...
48 페이지
... Darwin's Hypothesis of Pangenesis . In contrast to the views already quoted we have the well - known pangenesis hypothesis of Darwin , an hypoth- esis which is thoroughly one of evolution , since Darwin believes that the whole ...
... Darwin's Hypothesis of Pangenesis . In contrast to the views already quoted we have the well - known pangenesis hypothesis of Darwin , an hypoth- esis which is thoroughly one of evolution , since Darwin believes that the whole ...
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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