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I. 1.4 (B) Neo- Lamarckism

In the light of recent findings in the field of genetics which confirm that environment does affect the form, structure; colour, size etc. and these characters are inheritable theory of Neo-Lamarckism evolved. Main scientists who contributed in the evolution of Neo-Lamarckism are: American Cope, T.H. Morgan, Spencer, Packard, Bonner, Tower, Naegali, Mc Dougal, etc. Term […]

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Categories Anthropology I

I.1.4 (B) Lamarckism

The first theory of organic evolution was postulated by a French biologists Jean Baptiste Lamarck in 1809 A.D., which is popularly known as Lamarckism. Lamarckism is also described under the name of “inheritance of acquired characters”. FACTS OF LAMRCKISM: Lamarckism is based upon following important facts: a)      Tendency to grow: The internal forces of and […]

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Categories Anthropology I

I. 1.4 (b) Theories of Organic Evolution (Pre- Darwinian, Darwinian and Post- Darwinian)

Evolution It is slow, progressive, continuous and irreversible change of organisms from simple and undeveloped form to complex and developed form in long course of time. Definition organic evolution Organic evolution is biological evolution. It is the gradual process of change in gene frequency of a population. Concept of organic evolution Organism undergo the process […]

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I.4 (a) Biological and Cultural factors in human evolution.

Biological factors 1. Factors related to Man Nervous system- development of brain, PNS, CNS, Encephalization Skeleton system – erect posture, opposable thumb, Ulnar opposition, Bipedalism Integumentary system – homeostasis and homeothermy Digestive system – omnivore diet Reproductive system – large gestation period Sexual dimorphism 2. Factors related to Environment Elaborate parental care End of ice age, […]

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