Question

the animal which retains urea for hypertonic

Answer 1

Answer:

Hii

elasmobranch fishes

elasmobranch fishesMarine elasmobranch fishes retain relatively high levels of urea to balance the osmotic stress of living in seawater. To maintain osmotic balance and reduce the energetic costs of making urea, it is important for these animals to minimize urea excretion to the environment.

Answer 2

Answer:

Marine elasmobranch fishes retain relatively high levels of urea to balance the osmotic stress of living in seawater. To maintain osmotic balance and reduce the energetic costs of making urea, it is important for these animals to minimize urea excretion to the environment