$Pheretima$ $posthuma$ is very useful as:

  • A
    Their burrows make the soil porous.
  • B
    They make the soil porous and mix their excretory products and organic waste into the soil.
  • C
    They are useful as fish food.
  • D
    They cause biological magnification in birds.

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Similar Questions

Hearts of Pheretima are situated in the segments

Identify the correct terms for the following analogy:
$(i)$ Excretory organ in cockroach : Malpighian tubules :: In earthworm : ...........
(ii) Scientific name of cockroach : Periplaneta americana :: Scientific name of earthworm : ...........

$Nephridia$ in the earthworm perform the function similar to flame cells in $Taenia$.

How many genital pores are present in an earthworm?

Nephridia of Earthworm are analogous to

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