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In an animal, which of the following structures represents the highest level of organization?

A. Heart
B. Mitochondrion
C. Red blood cell
D. Epidermis tissue

User SonOfRa
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1 Answer

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In an animal the structure of the Heart and the Red blood cells are the most important. When it all comes down to which is the most important, its the organization of the Heart.

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User STO
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