Ammonia is the chief excretory substance in

  • A
    Camel and whale
  • B
    Cartilaginous fishes
  • C
    Whale and porpoise
  • D
    Fresh water fishes

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Urea in human urine is derived from the breakdown of:

Which of the following is the least toxic nitrogenous waste?

Why is it essential to maintain osmoregulation in the body?

Which of the following is a uricotelic animal?

Give examples of ammonotelic animals.

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