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The most abundant constituent of atmospheric air is ?

  • Oxygen
  • Hydrogen
  • Carbon
  • Nitrogen

Answer: Option D

Similar Questions :

1. Plants developing in dry conditions are ?

  • lithophytes
  • xerophytes
  • mesophytes
  • hydrophytes

Answer: Option B

2. Among the biotic components of the ecosystem, the producer system is ?

  • Sea
  • Rivers
  • Green Plants
  • Animals

Answer: Option C

3. Human blood is a viscous fluid due to

  • Platelets in plasma
  • Proteins in blood
  • RBC and WBC in blood
  • Sodium in serum

Answer: Option B

4. Which is responsible for the process of cell division ?

  • mitosis
  • heterosis
  • fusion
  • fission

Answer: Option A

5. The compound used in anti-malarial drug is

  • Chloroquin
  • Aspirin
  • Neoprene
  • Isoprene

Answer: Option A

Read more from - Biology Questions Answers
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