Explain the term 'Regeneration' as used in relation to reproduction of organisms. Describe briefly how regeneration is carried out in multicellular organisms like Hydra.
Regeneration is the ability of an organism to give rise to a new organism/ individual from their body parts.
Regeneration in hydra-
i. When the body of hydra by any means is cut into a number of pieces
ii. Each piece contains specialised cells
iii. Regeneration is carried out by specialised cells. These cells proliferate and make large numbers of cells.
iv. From this mass of cells, different cells undergo changes to become various cell types and tissues.
v. These changes take place in an organised sequence referred to as development which finally leads to the development of a new organism.
