A) All have 13 chambered heart
B) All have 4 pairs of legs
C) All have closed circulatory system
D) All belong to class-Insecta
Correct Answer: D
Solution :
Cockroach, housefly, mosquitoes etc., all belong to class Insecta of the phylum- Arthropoda. These contain three pairs of legs (total six) for locomotion.
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