3. A new species of organism is introduced into an ecosystem in which it has no predators. The
organism feeds primarily on mice. What effect will this organism MOST LIKELY have on the
mouse population?
a. The new organism will cause the number of mice to increase.
b. The new organism will cause the number of mice to remain the same.
c. The new organism will cause the number of mice to decrease.
d. The new organism will have no effect.