Answers

2016-03-02T12:29:17+05:30
Regeneration happens through mitosis and a particular type of tissue can give rise to its own kind only . in complex organisms ,different tissue and organs have altogether different structures . regarding a different kind if tissue from another kind is niot possible 
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2016-03-02T12:53:04+05:30
Because complex organisms are made of cells , tissues, organs and organ system which prevents them from giving rise to new organisms through regeneration
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