In the biology lab, you are shown petri dishes of cheek cell cultures. one set of cells is thin, with individual cells arranged in a single, orderly layer. the other culture showed irregular crowding of cells. the crowding cells are likely cancer cells, showing an absence of

absense of apoptosis

The set of cells that had a thin layer, with individual cells are normal cells.

The set crowded with irregular cells are cancer cells.
Cancer cells are being produced in excess and can't stop dividing.
We could say that the process of apoptosis, the natural way a cell dies, is not happening and they continue to creat more copies of themselves.

Droughts cause very arid places such as a desert