1 pd a series of processes that take place within a cell in which biochemical
energy from organic substances (e.g., glucose) is converted into high
energy molecules called ATP for use in energy-requiring activities of the
cell

 Cells can
reproduce
react to stimuli which basically just means responding to an action
growth
take in or absorb nutrients
and get rid of wastes.

OR Blood cells, for example, transport your blood (oxygen and other things as well) through your body, so you stay alive.