Oxygen present in the atmosphere has been formed by:

Zoology Scope and Origin Of Life Mcqs
BILAL KHATTAK0

A.Evaporation of sea water
B.Photosynthesis by plants
C.Putrefaction of animals and plants
D.Metabolism of micro-organisms

Related Mcqs:

  1. BOD is the amount of oxygen:?
  2. What is Plankton?
  3. Carbondioxide of the present atmosphere is entirely produced by:
  4. Nektons are:
  5. Trophic levels are formed by:
  6. Trophic levels are formed by ____________.
  7. Xylem and phloem are conducting tissues found in ……….??
  8. Louis-Pasteur succeeded in disproving the spontaneous generation theory because:
  9. An example of an abiotic component is __________?
  10. Water vapour is __________?

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