Class IX

General feeling of irritability and tiredness may be due to lack of
  1. proteins
  2. carbohydrates
  3. fats
  4. vitamins
To enable materials locked up in dead organisms, main role is played by
  1. primary consumers
  2. secondary consumers
  3. decomposers
  4. detritivore
C12H22O11 is general formula of
  1. monosaccharide
  2. polysaccharides
  3. disaccharides
  4. trisaccharide
Secondary consumers are
  1. plants
  2. herbivores
  3. carnivores
  4. omnivores
Minerals do not include
  1. iodine
  2. calcium
  3. sodium
  4. iron
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