Developing Bird Embryos Excrete Most of Their Nitrogenous Waste as Uric

question 29

Multiple Choice

Developing bird embryos excrete most of their nitrogenous waste as uric acid because ________.

• A) it is less metabolically expensive to produce compared to other waste products
• B) it has a low solubility in water and is less toxic to the embryo than other forms of waste
• C) it requires less energy to transport across the egg shell
• D) it can be recycled by the embryo to make new protein

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