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Animal Kingdom — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYAnimal Kingdom2 Marks
Question
Pheretima posthuma is highly useful as:
  1. Their burrows make the soil loose.
  2. They make the soil porous, leave their castings and take organic debris in the soil.
  3. They are used as fish meal.
  4. They kill the birds due to biomagnification of chlorinated hydrocarbons.
✓

Answer

  1. They make the soil porous, leave their castings and take organic debris in the soil.

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