What forms the contractile ring in animal cells?

A) membrane vesicles
B) actin filaments
C) cellulose fibrils
D) cell wall
E) histones

Contractile Ring

A band of protein fibers that forms in the middle of a cell during cytokinesis, leading to cell division.

Actin Filaments

Protein filaments in the cytoskeleton of eukaryotic cells, playing a key role in cell movement, shape, and division.

Animal Cells

Eukaryotic cells characterized by the absence of a cell wall, presence of membrane-bound organelles, and the ability to move at some point in their life cycle.