Question

Describe briefly how regeneration is carried out in multicellular organisms like Hydra.

Answer 1

When a hydra is bisected anywhere in the upper 7^th or 8^th part of the body column, the upper half will regenerate a foot at its basal end and the lower half will regenerate a head at its apical end; each half generates the organ which it is missing. The regeneration is precise, and the head and foot are always formed specifically at the apical and basal ends, respectively.