Question

11. Which of the main excretory
waste in urine of fresh water fishes?
O Urea
O Uric acid
O Ammonia​

Answer 1

The primary excretory organ in fishes, as in other vertebrates, is the kidney. In fishes some excretion also takes place in the digestive tract, skin, and especially the gills (where ammonia is given off).

Answer 2

Explanation:

the correct answer is ammonia

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