AP BIOLOGY

Detailed explanation-1: -Complete answer: Mitosis occurred during the cleavage division. Cleavage involves cytokinesis and karyokinesis (mitosis) together. Mitotic apparatus consists of a central spindle and the polar esters which are made up of polymers of tubulin protein known as microtubules.

Detailed explanation-2: -Cytokinesis begins in anaphase and ends in telophase, reaching completion as the next interphase begins. The first visible change of cytokinesis in an animal cell is the sudden appearance of a pucker, or cleavage furrow, on the cell surface.

Detailed explanation-3: -During cytokinesis, the cell membrane pinches in at the cell equator, forming a cleft called the cleavage furrow.

Detailed explanation-4: -Cytokinesis is the final act of cell division. In a typical animal mitosis, a cleavage furrow forms at the equatorial cortex after anaphase. This furrow then advances inwards to separate the two daughter cells.