What is one biotic factor that can change the size of a population in an ecosystem?

a) the type of soil present

b) the number of predators present

c) the average yearly temperature

d) the amount of available groundwater

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.