10. Humans cannot survive at sea by drinking salt water. However, marine vertebrates such as sea turtles and various seabirds can survive by drinking salt water. What do they have that humans do not?
(A) Salt glands.
(B) They use ammonia as their primary nitrogenous waste.
(C) Kidneys are extremely good at producing concentrated urine.
(D) Body fluid concentrations are similar to or greater than those of seawater.
(E) The ability to secrete salts and wastes into their intestinal contents like an insect.