Energy in this environment flows from - A the herring to the small crustaceans to the phytoplankton.

B. the herring to the mackerel to the sharks.

C. the phytoplankton to the sharks to the small crustaceans.

D. the sharks to the small crustaceans to the mackerel.

Asmall number of finches are removed randomly from the wild and placed in a protected bird area. they are given as much food as they need and have plenty of space. why would natural selection not occur in this population? a. there is no reason for genetic mutation to occur. b. the birds compete for limited resources, c. the population has not reached carrying capacity. d. there is no genetic variation in the finches.

Why do carbohydrate molecules function so well as fuel for the body?

What blood vessels carry blood to the heart? away from the heart?