1.

RBCs do not occur inA. frogB. cowC. camelD. cockroach

Answer» Correct Answer - D
(d) RBCs or red blood corpuscles are meant for the transportation of respiratory gases in the blood and these are present in all vertebrates.
In cockroach haemolymph is present which serves for the transportation of nutrients, maintains hydrostatic pressure and acts as a reservior of water.


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