Open circulatory system is not of physiological hindrance in Cockroach – McqOptions

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1.	Open circulatory system is not of physiological hindrance in Cockroach because [AIIMS 1999]
A.	Heart is simple but chambered
B.	Blood is colourless
C.	Circulatory and respiratory systems are not connected
D.	Excretion occurs through malpighian tubules
Answer» D. Excretion occurs through malpighian tubules

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