describe cell division?

Answer 1

Nitu´s answer is correct, unfortunately, she doesn´t describe cell division at all.... (a part from saying that is important)

Cell division, or mitosis, is generally divided in 4 (or 5 ) phases: prophase, metaphase, anaphase and telophase. These are then followed by cytokynesis.
In prophase the cell prepares itself for division. The nucleus swells, and chromosomes become visible. Each chromosome has two chromatids as a result of duplication of the DNA which took place during interphase. The two chromatids are linked together at a centromere. The centrosome (2 centrioles) duplicates into 2 diplosomes, and each diplosome, or aster moves toward opposite poles of the nucleus.
In metaphase, microtubules assemble, and form a network (the spindle fibres). The chromosomes move towards the equator of the cell, where they are visible. This is the phase in which morphological studies of chromosomes are carried out, often for clinical purposes.
In anaphase, the two sister chromatids (replicated during S-phase) separate. Each one migrates to opposite ends of the cell. So each daughter cell has an identical complement of chromosomes . The nuclear membrane has disappeared at this stage. The cell membrane expands as the cell itself elongates. The diameter of the cell decreases at the equator.
Finally, in telophase, a new membrane forms around the new nuclei and two cells are quickly formed. The chromatid, now called a chromosome, uncoils, and the nucleolus becomes visible again.

Each cell contains a pair of chromosomes (2n chromosomes) .

Answer 2

Cell division is the process by which a cell, called the parent cell, divides into two cells, called daughter cells. Cell division is usually a small segment of a larger cell cycle. In meiosis however, a cell is permanently transformed and cannot divide again.
Cell division is the biological basis of life. For simple unicellular organisms such as the Amoeba, one cell division reproduces an entire organism. On a larger scale, cell division can create progeny from multicellular organisms, such as plants that grow from cuttings. But most importantly, cell division enables sexually reproducing organisms to develop from the one-celled zygote, which itself was produced by cell division from gametes. And after growth, cell division allows for continual renewal and repair of the organism.
The primary concern of cell division is the maintenance of the original cell's genome. Before division can occur, the genomic information which is stored in chromosomes must be replicated, and the duplicated genome separated cleanly between cells. A great deal of cellular infrastructure is involved in keeping genomic information consistent between "generations".