Are the Effects of Use and Disuse Inherited?: An Examination of the View Held by Spencer and DarwinMacmillan, 1890 - 156 páginas |
Dentro del libro
Resultados 1-5 de 9
Página xi
... EVIL VARIED EFFECTS OF USE AND DISUSE USE - INHERITANCE IMPLIES PANGENESIS PANGENESIS IMPROBABLE . · • · · 127 128 134 137 • · 138 SPENCER'S EXPLANATION OF USE - INHERITANCE 141 CONCLUSIONS . PAGE 144-156 USE - INHERITANCE DISCREDITED ...
... EVIL VARIED EFFECTS OF USE AND DISUSE USE - INHERITANCE IMPLIES PANGENESIS PANGENESIS IMPROBABLE . · • · · 127 128 134 137 • · 138 SPENCER'S EXPLANATION OF USE - INHERITANCE 141 CONCLUSIONS . PAGE 144-156 USE - INHERITANCE DISCREDITED ...
Página 38
... evil ? Does it only transfer the newly - acquired weakness , and not the previous long - continued vigour ? ( 2 ) Members of nervous families would be liable to suffer from nervous prostration , and by the ordinary law of heredity alone ...
... evil ? Does it only transfer the newly - acquired weakness , and not the previous long - continued vigour ? ( 2 ) Members of nervous families would be liable to suffer from nervous prostration , and by the ordinary law of heredity alone ...
Página 46
... evil effects of alcohol , " and to this extent at least he strongly impressed the belief in the inheritance 1 Weismann's Essays on Heredity & c . Clarendon Press , of acquired characters upon his children's minds.1 Darwin must also 1889 ...
... evil effects of alcohol , " and to this extent at least he strongly impressed the belief in the inheritance 1 Weismann's Essays on Heredity & c . Clarendon Press , of acquired characters upon his children's minds.1 Darwin must also 1889 ...
Página 128
... evil , it then becomes probable that on the whole natural selection would more strongly dis- courage and eliminate it as a hostile factor than it might occasionally favour such a tendency as a totally unnecessary aid . USE - INHERITANCE ...
... evil , it then becomes probable that on the whole natural selection would more strongly dis- courage and eliminate it as a hostile factor than it might occasionally favour such a tendency as a totally unnecessary aid . USE - INHERITANCE ...
Página 129
... evil results of use- inheritance , natural selection would be eliminat- ing use - inheritance itself . The displacement of Lamarck's theory by Darwin's shows that the effects of use - inheritance often differ from those K required by ...
... evil results of use- inheritance , natural selection would be eliminat- ing use - inheritance itself . The displacement of Lamarck's theory by Darwin's shows that the effects of use - inheritance often differ from those K required by ...
Otras ediciones - Ver todas
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.