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
I chose B.
1 answer
Correct! The presence or absence of predators can greatly affect the size of a population in an ecosystem. When there are fewer predators, the population of prey organisms can increase, but when there are more predators, the population of prey organisms may decrease.