Topics: Circulation and Excretion Quiz
Ammonia is the most toxic nitrogenous waste. Organisms that produce this must have access to lots of
A. oxygen
B. proteins
C. dry air
D. water
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Why do premature infants suffer respiratory failture?
A. sudden changes in the oxygen from the uterine environment
B. mutations in genes regulating the formation of the lungs
C. lungs collapse due to lack of surfactants