Blue jays and crows eat caterpillars and mice. if the number of blue jays increases, what are the two likely effects on other populations?
the number of crows will increase.
the number of mice will decrease.
the number of mice will increase.
the number of caterpillars will decrease.
the number of caterpillars will increase.

The number of mice will decrease.

The number of caterpillars will decrease.

Explanation:

A predator is an organism which kills other organisms so as to obtain it as food. The organism which is killed by the predator is called as prey. The predator prey relationship is essential for maintaining the balance of the increasing prey population in an ecosystem.

According to the given situation, blue jays and crows are both dependent upon caterpillars and mice for food. Blue jays and crows are both predators and caterpillars and mice are prey. If the population of blue jays increases then the two prey populations will decrease. Hence, outcome will be

The number of mice will decrease.

The number of caterpillars will decrease.

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

not sure if this what   you'r looking for would be percent composition