How many sub layers does the earths layer have how deep are they and how thick do they measure

In a certain ecosystem owls are predators for mice. the owl population increases and they eat more mice this causes the mouse population to decrease what happens next? a. the birth of mice increases. b. the birth rate of owls increases c. the population of owls decreases d. the population of mice increases

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment

What is the identity of the planets?