Do cells divide and replace old cells at a very precise regulated rate?

The diagram illustrates the activity of vesicles during a cellular process.

What will happen to a population of predators if there is a sudden, temporary increase in the number of prey? a. the population of predators will be uniform with no change. b. the population of predators will increase first and then decrease slowly. c. the population of predators will increase continuously.

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?