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 vii
... 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 sub- stitute on which moralists and legislators ...
... 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 sub- stitute on which moralists and legislators ...
Página viii
... civilizations , I desire that the thinkers who mould the opinions of mankind shall not be led astray from the true path of enduring progress and happiness by reliance on fallacious beliefs which will not bear examination . Such , at ...
... civilizations , I desire that the thinkers who mould the opinions of mankind shall not be led astray from the true path of enduring progress and happiness by reliance on fallacious beliefs which will not bear examination . Such , at ...
Página 15
... civilization predisposes to caries . But he shows that caries is caused by the lime salts in the teeth being attacked by acids from decomposing food in crevices , from artificial drink such as cyder , from sugar , from medicine , and ...
... civilization predisposes to caries . But he shows that caries is caused by the lime salts in the teeth being attacked by acids from decomposing food in crevices , from artificial drink such as cyder , from sugar , from medicine , and ...
Página 16
... civilization . small quantities . But the submaxillary and sub - lingual saliva lower incisors and held in the front poured out at the foot of the part of the jaw as in a spoon , more alkaline " ( Foster's Text Book of Physiology , p ...
... civilization . small quantities . But the submaxillary and sub - lingual saliva lower incisors and held in the front poured out at the foot of the part of the jaw as in a spoon , more alkaline " ( Foster's Text Book of Physiology , p ...
Página 30
... Civilization , with its leisure and wealth and accumulated knowledge , perfects human faculties by artificial cultivation , develops and combines means of enjoyment , and discovers unsuspected sources of interest and pleasure . The ...
... Civilization , with its leisure and wealth and accumulated knowledge , perfects human faculties by artificial cultivation , develops and combines means of enjoyment , and discovers unsuspected sources of interest and pleasure . The ...
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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.