AP BIOLOGY

Detailed explanation-1: -Because of this, animal cells can bend their cell membrane inward and perform cytokinesis “from the outside in” by forming a cleavage furrow. A cleavage furrow is an indentation on the cell surface that continuously deepens until the animal cell is “pinched” into two separate halves.

Detailed explanation-2: -Cytokinesis is the final stage in the cell cycle. The cytoplasm pinches in half and separates the nuclei into two daughter cells.

Detailed explanation-3: -Cytokinesis. Cytokinesis is the second part of the mitotic phase during which cell division is completed by the physical separation of the cytoplasmic components into two daughter cells.

Detailed explanation-4: -Cytokinesis is the last step of cell division that partitions the cellular organelles and cytoplasm of one cell into two. In animal cells, cytokinesis requires Rho-GTPase-dependent assembly of F-actin and myosin II (actomyosin) to form an equatorial contractile ring (CR) that bisects the cell.

Detailed explanation-5: -Answer and Explanation: The molecules that cause a dividing cell to pinch in two by contracting like a purse string are b. actin filaments. These actin filaments form a contractile ring in dividing animal cells called a cleavage furrow that functions to split the cytoplasm of a cell into two daughter cells.