42. Osmoregulation and Excretion
Osmoregulation and Excretion
Problem 6b
Textbook Question
Textbook QuestionBirds and insects excrete uric acid, whereas mammals and most amphibians excrete mainly urea. What is the chief advantage of uric acid over urea as a waste product? a. Uric acid is a much simpler molecule. b. It takes less energy to make uric acid. c. Less water is required to excrete uric acid. d. More solutes are removed excreting uric acid.
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