Are the Effects of Use and Disuse Inherited?: An Examination of the View Held by Spencer and DarwinMacmillan, 1890 - 156 páginas |
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Página 4
... Darwin ought not to be allowed to interfere in the slightest 1 Which originally appeared in the Nineteenth Century for April and May , 1886 . degree with the freest criticism of his conclu- sions . 4 ARE THE EFFECTS OF USE INHERITED ? I.
... Darwin ought not to be allowed to interfere in the slightest 1 Which originally appeared in the Nineteenth Century for April and May , 1886 . degree with the freest criticism of his conclu- sions . 4 ARE THE EFFECTS OF USE INHERITED ? I.
Página 11
... allowed for ) ; Australian jaws varied from 2 oz . to 4'5 oz . ( with no lost teeth to allow for ) ; while in Negro jaws the maximum rose to over 5 oz.1 In spite of disuse some European jaws were twice as heavy as the light- est ...
... allowed for ) ; Australian jaws varied from 2 oz . to 4'5 oz . ( with no lost teeth to allow for ) ; while in Negro jaws the maximum rose to over 5 oz.1 In spite of disuse some European jaws were twice as heavy as the light- est ...
Página 97
... allowed time or opportunity to act , as in the immediate offspring of the modified individual . Of the first kind of cases there seems to be a plentiful lack . Of the latter kind , according to Darwin , there appears to be none - a ...
... allowed time or opportunity to act , as in the immediate offspring of the modified individual . Of the first kind of cases there seems to be a plentiful lack . Of the latter kind , according to Darwin , there appears to be none - a ...
Página 156
... allowed to decide the battle of life independently of a foolish benevolence that prefers the elaborate cultivation and multiplication of weeds to the growth of corn and roses . We are trustees for the countless generations of the future ...
... allowed to decide the battle of life independently of a foolish benevolence that prefers the elaborate cultivation and multiplication of weeds to the growth of corn and roses . We are trustees for the countless generations of the future ...
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Términos y frases comunes
acquired characters acquired modifications alleged Animals and Plants appears artificial selection atavism attributed Aylesbury duck become birds bones breeds cause cent civilization concomitant variation Contemporary Review Crown 8vo cumulative Darwin Descent deterioration diminished diminution diseases domestic animals domestic rabbit duck effects of ancestral effects of disuse enlarged epilepsy evidence evil explanation eyes fact factor of evolution fancy pigeons father favoured Francis Darwin Francis Galton Galton gemmules guinea-pigs heredity Illustrations improvement incisors increased individual inherited effects inherited injuries inherited mutilations insects instances instincts jaws Lamarckian leg-bones legs lengthened muscles natural or artificial natural selection nervous neuter offspring organs Origin of Species pangenesis panmixia parents pigeons Plants under Domestication quasi-inheritance race Ray Lankester reduced wings relative reproductive elements sexual selection shortened Spencer spite of disuse spontaneous variations sternum structure suppose tameness teeth tend tendency theory thickened sole tion toes transmit true inheritance use-inheritance Variation of Animals weight Weismann wing-bones
Pasajes populares
Página 26 - For peculiar habits confined to the workers or sterile females, however long they might be followed, could not possibly affect the males and fertile females, which alone leave descendants. I am surprised that no one has hitherto advanced this demonstrative case of neuter insects, against the well-known doctrine of inherited habit, as advanced by Lamarck.