Question

1. during _________, chromatin condenses into chromosomes, the nuclear envelope breaks down, and a spindle starts to form.

a. metaphase
b. anaphase
c. prophase

Explanation:

In cell division (mitosis or meiosis), prophase is the first stage. During prophase, chromatin (loose DNA - protein complex) condenses into distinct chromosomes. The nuclear envelope, which surrounds the nucleus, breaks down. Also, the spindle apparatus (composed of microtubules) starts to form. Metaphase is when chromosomes align at the equatorial plate. Anaphase is when sister chromatids separate.

Answer:

C. prophase