Question

Why an organism needs tissues to perform their activity.

Answer 1

Explanation:

Cells carry on the many functions needed to sustain life. Specialized cells perform specialized functions in multicellular organisms. Groups of specialized cells cooperate to form a tissue, such as a muscle. Different tissues are in turn grouped together to form larger functional units, called organs....

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Answer 2

Explanation:

Cells carry on the many functions needed to sustain life. ... Specialized cells perform specialized functions in multicellular organisms. Groups of specialized cells cooperate to form a tissue, such as a muscle. Different tissues are in turn grouped together to form larger functional units, called organs.