The part of the cell cycle usually accompanied by division is M phase, also known as mitosis or meiosis.

Here's a breakdown:

* Interphase: The majority of the cell cycle, where the cell grows, copies its DNA, and prepares for division. It consists of G1, S, and G2 phases.

* M phase (Mitosis/Meiosis): The actual division of the cell into two or four daughter cells. This phase is characterized by the separation of chromosomes and the division of the cytoplasm (cytokinesis).

Mitosis is responsible for the growth and repair of tissues in multicellular organisms. It produces two genetically identical daughter cells.

Meiosis is a specialized cell division that occurs in germ cells to produce gametes (sperm and egg cells). It produces four daughter cells that are genetically different from the parent cell and contain half the number of chromosomes.

So, while the entire cell cycle is crucial for cell growth and replication, M phase is the specific part where the actual division takes place.