Complete the following cycle given below by filling the blanks (a), (b), (c), (d)

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microorganisms
cbse-class-8-science
friend-and-foe

#1

Complete the following cycle given below by filling the blanks (a), (b), ©, (d).
image

Answer:

  1. Lightning fixes nitrogen.
  2. Nitrogen fixing bacteria and blue-green algae fix atmospheric nitrogen.
  3. Nitrogenous waste from excretion and death.
  4. Bacteria turn compounds of nitrogen into gaseous nitrogen.