[Reviews of Cells]
3. Cells are oval to square structures usually containing ____?___.

A) cytoplasm, chloroplasts, and enclosing cell wall.

B) cytoplasm, nucleus, and and enclosing cell wall.

C) cytoplasm, mitochondria, and enclosing cell wall.

D) cytoplasm, nucleus, and an enclosing plasma membrane.

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Slichter