Multiple choice

Addition of which of the following elements in water speeds up the metamorphogenesis in frog tadpole larva?

  1. Iodine

  2. Potassium

  3. Sodium

  4. Chlorine

  5. -
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A Correct answer
Explanation

Metamorphosis is the change of shape during an animal's life. During metamorphosis, the tadpole develops back legs first, then front legs. After around 6 weeks of life, the mouth starts to widen. Iodine hastens metamorphosis in tadpoles.

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