Class X

Which of the following is an example of producers?
  1. Plastic pens
  2. Plastic cans
  3. Polythene
  4. Green plants
The number of atoms of oxygen present in ozone are
  1. 3
  2. 4
  3. 2
  4. 1
First order consumers are:
  1. Carnivores
  2. Herbivores
  3. Decomposers
  4. Omnivores
_______ is not a biodegradable pollutant.
  1. Paper
  2. Cotton Cloth
  3. Cotton
  4. DDT
The number of atoms of oxygen present in ozone are
  1. 3
  2. 4
  3. 2
  4. 1
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