1.

Which concept/theory do you remember after seeing this picture of Giraffes? Describe it in brief.

Answer»
  • The picture is based on the Lamarck’s principle of ‘use and disuse of organs’.
  • The morphological characters of organism develop because of specific activities that the organisms perform.
  • If some organ is not used it gets degenerated. If excessively used, it develops further.
  • Thus, the morphological changes take place due to activities or non-working of a particular body parts in an organism. Due to constant extension of neck to eat foliage from the top of the trees, giraffe’s neck became long.


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