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Question

The first, second and third moulting of Ascaris larvae occur in

A
soil, alveoli and lung
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B
liver, soil and stomach
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C
soil, lung and liver
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D
soil, lung and intestine
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Solution

The correct option is D soil, lung and intestine
Ascaris is a monogenetic parasite affecting humans. It causes the disease called ascariasis.

Moulting is a feature of nematodes that allows growth. Moulting is required as they are covered by a thick cuticle that does not permit growth.

Usually 4 moults occur during its life cycle.
  • 1st moulting - soil
  • 2nd and 3rd moulting - lung
  • 4th moulting - Intestine


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