Class VIII

Capillaries are
  1. thin
  2. transfer oxygen
  3. transfer oxygen
  4. all of them
Composition of red blood cells have specialized protein called
  1. iron
  2. chlorophyll
  3. copper
  4. silver
Process by which energy is released from glucose or other food molecules in cell of living organisms is called
  1. respiration
  2. transpiration
  3. digestion
  4. defecation
Number of chambers in a heart is
  1. 2
  2. 3
  3. 4
  4. 1
Insects breath through small holes in their body called
  1. lungs
  2. air sacs
  3. stomata
  4. spiracles
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