Which of the following is not an advantage of uric acid excretion in terrestrial animals?

Which of the following is not an advantage of uric acid excretion in terrestrial animals?
  a. Uric acid can be excreted as a paste, thereby conserving water.
  b. Uric acid is not toxic and can be safely stored.
  c. Uric acid can be stored in the eggs of animals without harm to the embryos.
  d. Uric acid is soluble in water and can be easily excreted.
  e. Uric acid can be excreted along with feces in some animals.

Question 2

How do terrestrial animals prevent toxic accumulation of ammonia in their tissues?
  a. They use ammonia in other metabolic processes.
  b. They convert ammonia to less toxic forms.
  c. They vent ammonia across the body wall.
  d. They eliminate ammonia rather than excreting it.
  e. Animals do not produce ammonia