Class X

_______ is not a biodegradable pollutant.
  1. Paper
  2. Cotton cloth
  3. Cotton
  4. DDT
The formula of Ozone is _______
  1. O3
  2. O2
  3. O4
  4. O6
A detritus food chain begins with
  1. Carnivores
  2. Herbivores
  3. Omnivores
  4. Decomposers
Which of the following is an abiotic component
  1. plants
  2. animals
  3. soil
  4. microorganisms
Which of the following is an example of herbivores?
  1. Cow
  2. Shark
  3. Lion
  4. Tiger
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