cell division

If a culture has to be grown, then you have to bide your time while cell division takes its course.

In the lower orders of one-celled algæ, reproduction takes place by simple cell division.

When a cell division takes place, the nucleus breaks up into a number of thread-like portions which are known as chromosomes.

In the act of cell-division the nuclei of the resulting cells are formed from the nucleus of the primitive cell.

In some cases of cell-division a remnant of the old nucleus is stated to be visible after the fresh nuclei have appeared.

It is clear, as Hertwig has pointed out, that the polar bodies originate by a regular cell division and have the value of cells.