give one example and explain lamarck's theory
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one exampleof lamarck's theory is:
use and disuse of organ:
The development of organ is directly proportional to it's use. The disuse of organ leads to gradual weakening of that organ. A constant use anddisuse of organ leads to its modification in form and less used structure are reduced and ultimately they get lost. For example, a blacksmith develops strong muscles of the arm due to its constant use for hammering; snakes have elongated bodies accompanied by loss of limbs due to their constant creeping through holes, etc.
some other examples of lamarck's are:
1.Direct environmental effect
2.Inheritance of acquired character
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