Biology

The correct answer is: D.It disappears.

Explanation:

During prophase of mitosis, the nucleolus disappears or becomes less visible. This is part of the general process of chromatin condensation and the breakdown of the nuclear envelope, which occurs in preparation for chromosome alignment and separation.

A.It divides: The nucleolus does not divide during prophase. The cell undergoes division, but the nucleolus itself is not dividing.

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