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 vi
... importance of the subject has already been insisted on in emphatic terms by Mr. Herbert Spencer , and this importance may be even vi PREFACE .
... importance of the subject has already been insisted on in emphatic terms by Mr. Herbert Spencer , and this importance may be even vi PREFACE .
Página vii
... importance may be even greater than he imagined . Civilization largely sets aside the harsh but ultimately salutary action of the great law of Natural Selection without providing an efficient substitute for preventing degeneracy . The ...
... importance may be even greater than he imagined . Civilization largely sets aside the harsh but ultimately salutary action of the great law of Natural Selection without providing an efficient substitute for preventing degeneracy . The ...
Página viii
... important inquiry in a debatable region of inference and conjecture , where ( I am afraid ) evidence on either side ... IMPORTANCE INQUIRY .. AND BEARING OF THE viii PREFACE .
... important inquiry in a debatable region of inference and conjecture , where ( I am afraid ) evidence on either side ... IMPORTANCE INQUIRY .. AND BEARING OF THE viii PREFACE .
Página ix
... IMPORTANCE INQUIRY .. AND BEARING OF THE PAGE V I SPENCER'S EXAMPLES AND ARGUMENTS 6—44 DIMINUTION OF THE JAWS 6 DIMINISHED BITING MUSCLES OF LAP - DOGS 12 • CROWDED TEETH · 14 BLIND CAVE - CRABS 17 No CONCOMITANT VARIATION FROM CON ...
... IMPORTANCE INQUIRY .. AND BEARING OF THE PAGE V I SPENCER'S EXAMPLES AND ARGUMENTS 6—44 DIMINUTION OF THE JAWS 6 DIMINISHED BITING MUSCLES OF LAP - DOGS 12 • CROWDED TEETH · 14 BLIND CAVE - CRABS 17 No CONCOMITANT VARIATION FROM CON ...
Página xii
... . PAGE 144-156 USE - INHERITANCE DISCREDITED AS UNNECES- SARY , UNPROVEN , AND IMPROBABLE • 144 MODERN RELIANCE ON USE - INHERITANCE MIS- PLACED 145 Are the Effects of Use and Disuse Enherited ? IMPORTANCE xii CONTENTS.
... . PAGE 144-156 USE - INHERITANCE DISCREDITED AS UNNECES- SARY , UNPROVEN , AND IMPROBABLE • 144 MODERN RELIANCE ON USE - INHERITANCE MIS- PLACED 145 Are the Effects of Use and Disuse Enherited ? IMPORTANCE xii CONTENTS.
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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.