Q
Assertion (A): Marine fishes excrete nitrogenous waste primarily as ammonia.
Reason (R): Marine fishes are hyperosmotic, leading to high water retention.
A. Both A and R are true, and R explains A.
B. Both A and R are true, but R does not explain A.
C. A is correct, R is incorrect.
D. A is incorrect, R is correct.
Correct Answer:
C
Explanation:
Marine fishes excrete urea/trimethylamine oxide, not ammonia; so A is wrong.