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 viii
... beliefs which will not bear examination . Such , at least , is the feeling or motive which has prompted me to devote much time and thought to a difficult but important inquiry in a debatable region of inference and conjecture , where ...
... beliefs which will not bear examination . Such , at least , is the feeling or motive which has prompted me to devote much time and thought to a difficult but important inquiry in a debatable region of inference and conjecture , where ...
Página 37
... belief that nervous disorders of a less severe kind are inheritable " . a general belief which does not necessarily include the trans- mission of purely artificially - produced disorders , and so misses the point which is really at ...
... belief that nervous disorders of a less severe kind are inheritable " . a general belief which does not necessarily include the trans- mission of purely artificially - produced disorders , and so misses the point which is really at ...
Página 46
... belief in the inheritance of acquired characters was more or less hereditary in the family . His grandfather , Erasmus Darwin , an- ticipated Lamarck's views in his Zoonomia , which Darwin at one time " greatly admired . " His father ...
... belief in the inheritance of acquired characters was more or less hereditary in the family . His grandfather , Erasmus Darwin , an- ticipated Lamarck's views in his Zoonomia , which Darwin at one time " greatly admired . " His father ...
Página 47
... belief in evolution.2 " Never- theless , " he says , " it is probable that the hearing rather early in life such views maintained and praised may have favoured my upholding them under a different form in my Origin of Species " . a ...
... belief in evolution.2 " Never- theless , " he says , " it is probable that the hearing rather early in life such views maintained and praised may have favoured my upholding them under a different form in my Origin of Species " . a ...
Página 48
... belief in early life without first questioning and rigorously test- ing it as he would have done had it originated with himself . In later life it appeared to assist his theory of evolution in minor points , points , and in particular ...
... belief in early life without first questioning and rigorously test- ing it as he would have done had it originated with himself . In later life it appeared to assist his theory of evolution in minor points , points , and in particular ...
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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.