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Metamorphosis

Axolotl larva...

Question

Axolotl larva shows
i. Neoteny and paedogenesis
ii. Absence of thyroxine affects metamorphosis
iii. It is hemichordate

i, ii and iii correct

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i and ii correct

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ii and iii correct

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iii correct

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Solution

The correct option is B i and ii correct

The remarkable axolotl or Ambystoma mexicanum is part of the family of 'mole salamanders', but exhibits an unusual and extreme trait known as neoteny, or paedomorphosis. This is the retention of larval stage characteristics throughout life, so axolotls usually never fully resemble an adult salamander. It is a urochordate.
So, the correct option is ‘i and ii correct’.

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