Which of the following statements is incorrect?

  • A
    Cockroaches exhibit mosaic vision with less sensitivity and more resolution.
  • B
    $A$ mushroom-shaped gland is present in the $6^{th}-7^{th}$ abdominal segments of male cockroach.
  • C
    $A$ pair of spermatheca is present in the $6^{th}$ segment of female cockroach.
  • D
    Female cockroach possesses sixteen ovarioles in the ovaries.

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Complete the following statement :
$(a)$ In cockroach,grinding of food particles is performed by ........ .
$(b)$ Malpighian tubules help in the removal of ........ .
$(c)$ The hindgut of the cockroach is differentiated into ........ .
$(d)$ In the cockroach,blood vessels open into spaces called ........ .

About how many times does the nymph of the Periplaneta americana undergo moulting before becoming an adult?

Which one of the following is one of the paths followed by air or $O_2$ during respiration in the adult male $Periplaneta$ $americana$ as it enters the animal body?

In cockroaches,during the digestion of food,the enzyme cellulase is synthesized by:

The primary excretory product in a cockroach is .....

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