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reproduction
mitosis
An old cell splits in two, and then there are two cells - half the old one and the other half of the old one, both of which are 'new' individual cells.
new cells can be made for three reasons To replace damage tissue. To replace old cells to use for growth
They multiply, a single cell just splits into 2
That process is called Mitosis. It is the division of cells and organisms creating 2 new cells from the parent cell/organism. _________________ budding! ex- hydra
Old cells make new cells so that when the old ones die there are new ones to replace them.
Cell Theory. It states that all new cells are created by old cells dividing into two.
Just think of this.. when you are in your mothers womb you are like a seed, that soon grows bigger into a baby. It is similar with cells. All cells come from pre - existing cells . a mother cell will give birth to a tiny baby cell and when it is old and weak a new cell is born. This process continues till the end of your life
from old cells
Building new cells requires energy and old cells. They use the old cells that have become worn out or damaged.
The cell process called osmosis is what causes a suntan to fade. New cells in the skin are formed that are not tanned. The old cells that are tanned become exfoliated because they are on the top layer of the skin.