Question

q4 3. during metaphase, a step in the cell cycle, a cell — forms two new nuclear envelopes for chromosomes. moves its chromosomes to opposite poles of the cell. stimulates its chromatin to condense into a chromosome. aligns its chromosomes in the middle of the cell.

Explanation:

During metaphase of the cell - cycle, the key event is the alignment of chromosomes at the equatorial plane (middle) of the cell. Formation of two new nuclear envelopes occurs in telophase, movement of chromosomes to opposite poles is anaphase, and chromatin condensation into chromosomes starts in prophase.

Answer:

D. aligns its chromosomes in the middle of the cell.