Nitrogenous wastes are primarily excreted in the form of ........

  • A
    Urea in tadpoles and ammonia in adult frogs
  • B
    Ammonia in tadpoles and urea in adult frogs
  • C
    Urea in both tadpoles and adult frogs
  • D
    Urea in tadpoles and uric acid in adult frogs

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Aquatic reptiles are ........ .

The characteristic that is shared by urea,uric acid and ammonia is/are:
$I.$ They are nitrogenous wastes.
$II.$ They all need very large amount of water for excretion.
$III.$ They are all equally toxic.
$IV.$ They are equally in the kidneys.

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