Question

multiple select question
select all that apply
select the events that occur during prophase.

the nuclear membrane disintegrates.
the nucleolus disappears.
the sister chromatids are pulled toward the center of the cell.
spindle fibers form in the cytoplasm.
the cells chromatin condenses into chromosomes.
the sister chromatids separate into two identical chromosomes.

Explanation:

To solve this, we recall the events of prophase in cell division (mitosis/meiosis):

• The nuclear membrane disintegrates (occurs in prophase).
• The nucleolus disappears (occurs in prophase).
• Sister chromatids being pulled to the center is metaphase (not prophase).
• Spindle fibers form (occurs in prophase).
• Chromatin condenses into chromosomes (occurs in prophase).
• Sister chromatids separating is anaphase (not prophase).

Answer:

A. The nuclear membrane disintegrates.
B. The nucleolus disappears.
D. Spindle fibers form in the cytoplasm.
E. The cell's chromatin condenses into chromosomes.