Which of the following is the respiratory pigment of cockroach?

Haemozoin

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Haemocyanin

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Haemoglobin

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None of the above

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Solution

The correct option is B Haemocyanin
The blood in cockroaches is called hemolymph. Hemolymph is colourless because there are no blood cells or respiratory pigment. The cockroaches lack respiratory pigment. Hemocyanin is a protein which carries the oxygen in the arthropods.
So, the correct answer is option B.

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