The blood of $Pheretima$ is:

  • A
    Blue with haemocyanin in corpuscles
  • B
    Blue with haemocyanin in plasma
  • C
    Red with haemoglobin in corpuscles
  • D
    Red with haemoglobin in plasma

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The intestinal excretory organs (septal nephridia) of $Pheretima$ have a function of:

In which of the following are the nephridial funnels (nephrostomes) present?

Chloragogen cells resemble the following in function:

Explain the process of mating and the formation of the cocoon in earthworms.

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