What occurs when too much of a population relys on something.

What occurs when too much of a population rely on something?

This leads to overcrowding after which competition sets in and it would diminish the resources and death of the unfit organism while the fittest survives.

Explanation:

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

gold i'm pretty sure i might be wrong