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प्रश्न
Describe briefly how regeneration is carried out in multicellular organisms like Hydra.
उत्तर
When a hydra is bisected anywhere in the upper 7th or 8th 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.
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