Explain the term "Regeneration" as used in relation to reproduction of organisms. Describe briefly how regeneration is carried out in multicellular organisms like Hydra.

Explanation

Regeneration : It is the ability of an organism to give rise to a new organism/individual from their body parts.
Regeneration in Hydra :
(i) The body of Hydra by any means is cut into number of pieces.
(ii) Each piece contains specialized cells.
(iii) These cells proliferate and make large number of cells.
(iv) From this mass of cells different cells undergo changes to become various cell types and tissues which finally develops into a new organism.