CBSE  /  Class 10  /  Science  /  Our Environment

  • 1. 
    The transfer of energy in a food chain is always:

  • Unidirectional
  • Methane
  • Bi-directional
  • Random

  • 2. 
    Which of these organisms are the most important decomposers in an ecosystem?

  • Algae and fungi
  • Fungi and bacteria
  • Algae and bacteria
  • Bacteria and virus

  • 3. 
    Which of these does not belong to biotic component?

  • Parasites
  • Fungi
  • Bacteria
  • Soil
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