Blood of which of the following is colourless?

  • A
    Earthworm
  • B
    Leech
  • C
    Cockroach
  • D
    Frog

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During the life cycle of a cockroach ($Periplaneta$ $americana$): ........

Write a note on the mouthparts of a cockroach.

Which of the following statements is correct regarding $Periplaneta$ $americana$?

Cockroach is:

Male and female cockroaches can be distinguished externally through:

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