Growth. The number of cells within an organism
increases by mitosis and this is the basis of growth in
Cell Replacement. Cells are constantly sloughed
off, dying and being replaced by new ones in the skin and
digestive tract. When damaged tissues are repaired, the new
cells must be exact copies of the cells being replaced so as
to retain normal function of cells.
Regeneration. Some animals can regenerate parts
of the body, and production of new cells are achieved by
Vegetative Reproduction. Some plants produce offspring
which are genetically similar to themselves. These offspring are called
- Uncontrollable Cell Division
Red blood cells have short live spans of about 4 months and
need to be replaced constantly by mitosis.