Choose the correct answer from the allternatives given.
How many pairs of spiracles are found in cockroach?

2 pairs in thorax and 8 pairs in abdomen

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1 pair in thorax and 8 pairs in abdomen

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2 pairs in thorax and 6 pairs in abdomen

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3 pairs in thorax and 8 pairs in abdomen

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Solution

The correct option is A 2 pairs in thorax and 8 pairs in abdomen
Answer A: 2 pairs in the thorax and 8 pairs in the abdomen.
A cockroach has a total of 10 pairs i.e. 20 spiracles in all. These are organized as 2 pairs of thoracic spiracles and 8 pairs of abdominal spiracles.

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