What is the principal nitrogenous waste product excreted by healthy adult birds?
Correct answer: A. Uric acid
- A. Uric acid
- B. Ammonia
- C. Urea
- D. Creatinine
Explanation
Birds are mainly uricotelic and excrete nitrogen chiefly as uric acid, which conserves water and is eliminated as a semisolid component of the droppings. Mammals primarily excrete urea, while ammonia is highly toxic and usually converted before excretion.
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Covers the gross and microscopic structure of domestic animals, including bones, joints, muscles, organs, blood vessels and nerves. It explains how the respiratory, cardiovascular, digestive, urinary, nervous, endocrine and reproductive systems function, with attention to species differences and the relationship between anatomical structure and physiological processes.
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