Answer: Ammonotelic.
- A Uricotelic
- B Aminotelic
- C Ureotelic
- D Ammonotelic
Correct answer: D. Ammonotelic
Explanation: Ammonotelic animals, such as most bony fish, excrete nitrogenous waste mainly as ammonia, which requires large amounts of water for safe elimination.
Filtrate flows through four functionally distinct stages of the nephron: Bowman's capsule filters blood, the PCT reabsorbs most useful substances unconditionally, the Loop of Henle builds a concentration gradient via counter-current exchange, the DCT secretes selected substances, and the collecting duct performs the final ADH-controlled water reabsorption.
Concept context
Nitrogenous waste, kidney structure, urine formation in the nephron, and hormonal regulation of excretion.
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