Select all the correct answers.
Nathan is an ecologist. He’s studying the effect of secondary consumers on primary consumers. His current research focuses on a population of blue jays and crows. They eat caterpillars and mice. If the number of blue jays increases, what are the likely effects on other populations?
The number of crows will increase.
The number of mice will decrease.
The number of mice will remain the same.
The number of caterpillars will decrease.