Question

Explain Lamarkism in an easy way.

Answer 1

Hey,here is ur answer

The main postulates of Lamarck’s theory of evolution are:

1. Effect of the environment

The change in the environment creates new needs in organisms, which results in change of habits of organisms. The new habits involve more use of certain organs of the body and on the other hand less use of other body organs.

2. Use and disuse of organs

The use and disuse of organs by an organism leads to acquisition of new characteristics.

3. Inheritance of acquired characters

The characters acquired by an individual are then transmitted by heredity to the next generation. In this way, in every generation new characters get accumulated and after a number of generations, a new species with modified characters is formed.

Criticism

Lamarck’s theory of evolution was very strongly criticized by another biologist, August Weismann; he showed that even after cutting the tails of rats continuously for 21 generations, a tailless rat was never born.

Answer 2

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Hope you understand.....
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