African Lungfish,which Are Often Found in Small,stagnant Pools of Fresh

question 67

Multiple Choice

African lungfish,which are often found in small,stagnant pools of fresh water,produce urea as a nitrogenous waste.What is the advantage of this adaptation?

• A)Urea takes less energy to synthesize than ammonia.
• B)Small,stagnant pools do not provide enough water to dilute the toxic ammonia.
• C)Urea forms an insoluble precipitate.
• D)Urea makes lungfish tissue hypoosmotic to the pool.

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