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For a tissue or an organ to function as a unit, _____.

A) there must be a signal molecule recognized by all cells in the tissue or organ
B) there must be cell-cell communication among the cells within a tissue or organ
C) the tissue or organ must perform similar functions
D) the tissue or organ must be composed of all of the same type of cells

Marked as best answer by Alexis


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Answer: B

Mr Harrison

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Great help.

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