Question

the diagram below shows a cell in a c stage of mitosis. which of these describes what will occur in the next stage?
cell membrane pinches inward; centrioles disappear.
spindle fibers pull chromosomes apart; chromosomes condense.
nuclear envelope appears; chromosomes uncoil.
chromosomes line up at center of nucleus; spindle fibers attach to centromeres.

Explanation:

Step1: Identify the stage of mitosis shown in the diagram

The diagram shows chromosomes that are visible (condensed) but not yet lined up at the center. This indicates it is in the prophase or early metaphase. But since the key for the next stage is about movement, focus on the process.

Step2: Recall the stages of mitosis

In mitosis, after chromosomes condense (if not already fully in metaphase alignment), the next step (if it's prophase - like initial stage shown) - in metaphase, chromosomes line up at the center (equator) of the cell and spindle fibers attach to centromeres.

Answer:

Chromosomes line up at center of nucleus; spindle fibers attach to centromeres.