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 ix
... AND NECESSITY FOR CONCOMI- TANT VARIATION . ALLEGED RUINOUS SELECTION .. • EFFECTS OF NATURAL ADVERSE CASE OF NEUTER INSECTS ÆSTHETIC FACULTIES b 18 • 23 24 29 LACK OF EVIDENCE INHERITED EPILEPSY IN GUINEA - PIGS INHERITED.
... AND NECESSITY FOR CONCOMI- TANT VARIATION . ALLEGED RUINOUS SELECTION .. • EFFECTS OF NATURAL ADVERSE CASE OF NEUTER INSECTS ÆSTHETIC FACULTIES b 18 • 23 24 29 LACK OF EVIDENCE INHERITED EPILEPSY IN GUINEA - PIGS INHERITED.
Página 24
... NEUTER INSECTS . Mr. Spencer also holds that most mental phenomena , especially where complex or social or moral , can only be explained as arising from use - inheritance , which becomes more and more important 24 ARE THE EFFECTS OF USE ...
... NEUTER INSECTS . Mr. Spencer also holds that most mental phenomena , especially where complex or social or moral , can only be explained as arising from use - inheritance , which becomes more and more important 24 ARE THE EFFECTS OF USE ...
Página 25
... from countless generations of queen bees and drones , whose habits have been widely different from those of the workers , and whose structures are dissimilar in various respects . In many species of ants there are NEUTER INSECTS . 25.
... from countless generations of queen bees and drones , whose habits have been widely different from those of the workers , and whose structures are dissimilar in various respects . In many species of ants there are NEUTER INSECTS . 25.
Página 26
... neuter is three times the size of the other , 1 Origin of Species , pp . 230-232 ; Bates's Naturalist on the Amazons . Darwin is " surprised that no one has hitherto advanced the demonstrative case of neuter insects , against the well ...
... neuter is three times the size of the other , 1 Origin of Species , pp . 230-232 ; Bates's Naturalist on the Amazons . Darwin is " surprised that no one has hitherto advanced the demonstrative case of neuter insects , against the well ...
Página 27
... neuter classes in the leaf - cutting ants has a single eye in the midst of its forehead . In certain Mexican and Australian ants some of the neuters have huge spherical abdomens , which serve as living reservoirs of honey for the use of ...
... neuter classes in the leaf - cutting ants has a single eye in the midst of its forehead . In certain Mexican and Australian ants some of the neuters have huge spherical abdomens , which serve as living reservoirs of honey for the use of ...
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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
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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.