試題詳解

60. Animals release their nitrogenous waste in different forms. Which of the following statements are true ? ① Urea is excreted by many marine fishes. ② Ammonia is so toxic that it is rarely excreted as nitrogenous waste by any animals. ③ The animals in dry environment could excrete uric acid. ④ The form of nitrogenous waste is often an adaptation to animal habitats.
(A)① ② ③ ④
(B) ① ② 
(C) ① ②④ 
(D) ②④ 
(E) ①③ ④