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Byju's Answer
Standard VII
Biology
Phylum Annelida
Third moultin...
Question
Third moulting of
Ascaris
occurs in
A
Liver
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B
Egg
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C
Lung
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D
Intestine
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Solution
The correct option is
C
Lung
Life stages in ascaris is described as follows:
1st stage juvenile:
Called "Rhabditoid". Found in soil. Forms in 9 days from fertilised egg.
2nd stage juvenile :
Infective stage. Forms 10 days after 1st moulting. Swallowed by human.
3rd stage: juvenile and
4th stage juvenile.:
Found in alveoli of lungs.
1st moulting :
In soil
2nd moulting and 3rd moulting :
Lungs
4th moulting:
Host's intestine.
So, the correct answer is 'Lung'.
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