Class VI

Taking oxygen rich air into the body is called
  1. Exhalation
  2. Breathing
  3. Respiration
  4. Inhalation
Giving out air rich in CO2 is called
  1. Inhalation
  2. Respiration
  3. Breathing
  4. Exhalation
Which gas is required for aerobic respiration?
  1. Carbon dioxide
  2. Oxygen
  3. Nitrogen
  4. Ozone
Yeast is used to make
  1. Bread
  2. Wine
  3. Cakes
  4. All of these
Break down of food releases ____.
  1. Energy
  2. Proteins
  3. Carbon-dioxide
  4. None of these
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