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Question
Explain Lamarck’s Principle.
Solution
- Lamarckism is the theory of inheritance of acquired characters from one generation to another, given by Jean-Baptiste Lamarck.
- It states that the morphological changes occurring in living organisms are responsible for evolution. This concept was based on the principle of use and disuse of organs.
- Morphological changes may occur gradually, either due to specific activities or the laziness of a particular organism.
- For e.g. Browsing on leaves of tall plants caused the neck of the giraffe to become long; frequent hammering movements cause the shoulders of ironsmith to become strong; inactivity caused weakening of the wings of birds like emu; legs of swans and ducks have become useful for swimming due to living in water; due to burrowing habits, snakes have lost their legs; etc.
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RELATED QUESTIONS
Write short notes based upon the information known to you.
Lamarckism
Survival of fittest : Darwin : : Acquired characters : ..............................
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Given alongside are two figures (A and B) showing a phenomenon that was first observed in Manchester before and after the year 1850.
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