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Q.

Which of the following act as excretory structures in cockroaches?

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a

Phallic glands

b

Colleterial glands

c

Stink glands

d

Fat bodies

answer is D.

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Detailed Solution

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  • In cockroaches, excretion is performed primarily by Malpighian tubules. Additionally, fat body, nephrocytes and uricose glands also help in excretion.
  • Phallic gland helps in the formation of outermost layer of spermatophore in the male cockroaches.
  • Collaterial glands help in the formation of ootheca in female cockroaches.
  • Stink glands produce a foul-smelling secretion which helps in defense.
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