Question

copied dna condenses into chromosomes, nucleolus disappears, nuclear membrane breaks down, spindle fibers begin to form * 1 point prophase metaphase anaphase telophase

Explanation:

To determine the correct phase of mitosis, we analyze the given characteristics: DNA condenses into chromosomes, nucleolus disappears, nuclear membrane breaks down, and spindle fibers form. These are key events of prophase. Metaphase involves chromosomes aligning at the equator, anaphase is when sister chromatids separate, and telophase is the final phase with nuclear membrane reformation. So the correct phase is prophase.

Answer:

A. prophase