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Reason 1 →In multicellular organisms,division of labour is due to the presence of tissues.Each tissue performs a specific function effectively.
Reason 2→Tissues become organized to form organs and organs into organ system
Reason 3 →Workload of individual cell has decreased due to origin of tissues.
Reason 4→As a result of improved organization and higher efficiency,multicellular organisms have higher survival
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Qba Sir I have provided 4 reasons
Tissues are the cell organization such clusters is know as tissue there are two example animal and pant