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Regeneration

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(i) Wall lizard breaks up and discards some part of its tail in emergency .
(ii) Discarded part is regenerated after a period . This is an example of limited regeneration .
(iii) However , under certain situation, an animal Planaria breaks up its body into parts and thereafter each part regenerates remaining part of the body and thus new planaria are formed .
(iv) This is called regeneration.
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