A) resembles human blood in colour
B) Has RBCs
C) circulates through arteries and veins
D) circulates through an open system
Correct Answer: D
Solution :
The blood of cockroach and other insects has no respiratory pigment (haemoglobin) and hence the blood is not red. That is why, this blood is called haemolymph. Circulatory system in insects is of open type or lacunar type. In this type, blood is always in direct contact with tissues.
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