$Pheretima$ $posthuma$ is highly useful as:

  • A
    Their burrows make the soil loose.
  • B
    They make the soil porous,leave their castings,and take organic debris into the soil.
  • C
    They are used as fish meal.
  • D
    They kill the birds due to biomagnification of chlorinated hydrocarbons.

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Chloragogen cells are present in

Which of the following statements is not correct for an Earthworm?

In earthworms,the circumpharyngeal connectives connect the . . . . . . .

Spermathecae in $Pheretima$ are located in the segments:

The scientific name of the earthworm is ...........

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