IGNOU BANM 161 2026 2027 - Explain any two theories of Organic Evolution.

Question

Explain any two theories of Organic Evolution.

17 Jul 2026

Answer :

Word Count : 502

Organic evolution refers to the gradual changes that occur in living organisms over generations, leading to the development of new species from earlier forms. The study of evolution is an important aspect of biological anthropology because it helps in understanding human origin, biological variation and the relationship between humans and other organisms. Several theories have been proposed to explain the process of organic evolution. Among them, Lamarckism and Darwinism are two important theories. Lamarckism was proposed by the French naturalist Jean Baptiste Lamarck in his book *Philosophie Zoologique* published in 1809. Lamarck believed that organisms change according to the conditions of their environment. His theory is based mainly on two principles - the use and disuse of organs and the

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