Q23 / 157 · NTA Abhyas (NEET) 2020 · Zoology · Excretory Products and their Elimination

Which of the following statements are correct about the modes of excretion?

  • A
    All bony fishes are ammonotelic.
  • Correct answer
    B
    Aquatic mammals are ureotelic.
  • C
    Insects such as cockroach are ammonotelic.
  • D
    Tadpole of a frog is ureotelic.

Solution

Freshwater bony fishes are ammonotelic. Marine bony fishes release trimethylamine oxide as their chief excretory product. Terrestrial insects, such as cockroach, are uricotelic, while aquatic insects are ammonotelic. Tadpole of a frog is ammonotelic, while the adult frog is ureotelic. All mammals, terrestrial as well as aquatic, are ureotelic in nature.

Hence, the correct answer is option: 'B'.

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