Are the Effects of Use and Disuse Inherited?: An Examination of the View Held by Spencer and DarwinMacmillan, 1890 - 58 páginas |
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Página 13
... animals . Thus , one of the chief arguments with which Mr. Spencer supports ... plants is much greater than was sup- posed , and that " each part varies to ... Animals and Plants under Domes- tication . " correlated , so that they would ...
... animals . Thus , one of the chief arguments with which Mr. Spencer supports ... plants is much greater than was sup- posed , and that " each part varies to ... Animals and Plants under Domes- tication . " correlated , so that they would ...
Página 15
... animal life to the more complex activities , tastes , and habits of the higher organizations ( preface and page 74 ... animals , as with plants , any amount of modi- fication may be effected by the accumulation of numerous , slight ...
... animal life to the more complex activities , tastes , and habits of the higher organizations ( preface and page 74 ... animals , as with plants , any amount of modi- fication may be effected by the accumulation of numerous , slight ...
Página 20
... animals and plants become sterile when domesticated or supplied with too much nourishment . The native Tasmanians have already become extinct from sterility caused by greatly changed diet and habits . If , as Mr. Spencer teaches ...
... animals and plants become sterile when domesticated or supplied with too much nourishment . The native Tasmanians have already become extinct from sterility caused by greatly changed diet and habits . If , as Mr. Spencer teaches ...
Página 25
... animals ( human preference and increased weight evidently aiding ) , and also for the inferior instincts seen in ... Animals and Plants under Domestication , " i . , p . 292 of comparative weights and measurements , ' the leg - WINGS AND ...
... animals ( human preference and increased weight evidently aiding ) , and also for the inferior instincts seen in ... Animals and Plants under Domestication , " i . , p . 292 of comparative weights and measurements , ' the leg - WINGS AND ...
Página 26
... Animals and Plants under Domestication , " i . , pp . 299-301 . ? To keep pace with this lateral increase in weight , the leg - bones should have lengthened considerably , so that their total deficiency in proportional length is 17 per ...
... Animals and Plants under Domestication , " i . , pp . 299-301 . ? To keep pace with this lateral increase in weight , the leg - bones should have lengthened considerably , so that their total deficiency in proportional length is 17 per ...
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Términos y frases comunes
28 LAFAYETTE PLACE acquired characters alleged ancestral Animals and Plants ants appears artificial selection attributed birds ble Number bones breeds cause cent Charles Darwin civilization Cloth cumulative Descent diminished diminution diseases Double Number duck Edward Clodd effects of disuse enlarged Essays evidence evil eyes fact factor of evolution faculties favored Fitzgerald Galton gemmules Grant Allen Herbert Spencer heredity HUMBOLDT PUBLISHING Huxley increased individual inheritance of acquired inherited effects INHERITED INJURIES inherited mutilation instincts J. F. C. Hecker jaws leg-bones legs lengthened LL.D lower incisors modifications natural or artificial natural selection nervous offspring Origin of Species pangenesis panmixia parents pigeons Plants under Domestication Proctor Prof quasi-inheritance rabbit race reduced wings reduction reproductive elements Richard Chenevix Trench Science sexual selection shortened social Special number spite of disuse sternum structure suppose tameness teeth tendency theory thickened soles tion transmission transmit use-inheritance Variation of Animals weight Weismann William Kingdon Clifford wing-bones
Pasajes populares
Página 15 - 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.
Página 15 - The case, also, is very interesting, as it proves that with animals, as with plants, any amount of modification may be effected by the accumulation of numerous, slight, spontaneous variations, which are in any way profitable, without exercise or habit having been brought into play. For peculiar habits, confined to...
Página 37 - I think there can be no doubt that use in our domestic animals has strengthened and enlarged certain parts, and disuse diminished them ; and that such modifications are inherited.