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Question
___________ pairs of spiracles are present in the abdomen of cockroach.
___________ pairs of spiracles are present in the abdomen of cockroach.
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Solution
The correct option is A 8
First eight abdominal segments of cockroach have 8 pairs of spiracles (tiny openings), which are a part of the tracheal system of cockroach, by which they communicate with the exterior surrounding.So, the correct option is A.
First eight abdominal segments of cockroach have 8 pairs of spiracles (tiny openings), which are a part of the tracheal system of cockroach, by which they communicate with the exterior surrounding.
So, the correct option is A.
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