A) Conserve water
B) Actively pump salts out through the skin
C) Excrete large amounts of salts in urine
D) Excrete large amounts of water in urine
Correct Answer: A
Solution :
Terrestrial animals have limited access to water. Hence they have to secrete hypertonic urine and conserve water. Choices (3) and (4) are characteristics of marine animals who need to overcome the problem of preventing entry of salts and loss of water.
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