Answers

2014-03-20T15:15:01+05:30
 As you know multi cellular organisms need to carry out large number of functions. For this purpose, they have tissuesTissue ...
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2014-03-20T15:24:13+05:30
Your friend has answered correctly-  As you know multi cellular organisms need to carry out large number of functions. For this purpose, they have tissues. Tissue is the group of similar or dissimilar cells that perform same function by forming an organ system . 
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