Question

cytokinesis begins with the formation of an indentation around the cell called the ______ .
a asters
b centromere
c cleavage furrow
d equator

Explanation:

To solve this, we analyze each option:

• Option A: Asters are structures related to the spindle apparatus in cell division, not an indentation for cytokinesis.
• Option B: Centromere is the region of a chromosome where sister chromatids are attached, not related to the cell indentation in cytokinesis.
• Option C: During cytokinesis in animal cells, the process begins with the formation of a cleavage furrow, which is an indentation around the cell that eventually divides the cell.
• Option D: The equator (metaphase plate) is the region where chromosomes align during metaphase, not an indentation for cytokinesis.

Answer:

C. cleavage furrow