Number of spiracles present in cockroach is___________?
Correct answer: C. 20
- A. 15
- B. 10
- C. 20
- D. 30
Explanation
Cockroaches possess 10 pairs of spiracles, two pairs on the thorax and eight pairs on the abdomen. Therefore, the total number is 10 x 2 = 20 spiracles. Students may choose 10 by counting pairs rather than individual spiracles.
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