Class XI

Plastic anemia is caused due to rapid reduction as compared to replacement of
  1. Red blood cells
  2. White blood cells
  3. Platelets
  4. All of these
An inversion of smoke escape occurs if
  1. layer of warm air continually replaces cold air
  2. if layer of warm air acts like a lid and does not allow cold air and smoke to escape
  3. if hot air and smoke react to form smog
  4. if cold air acts as a lid and prevents escape of smoke and sulphur dioxide
Wastes of anaerobic respiration includes
  1. Lactic acid
  2. Ethanol
  3. Carbon dioxide
  4. Energy
Foam rubber is produced when latex is combined with
  1. Papain
  2. Catalase
  3. Proteases
  4. Lipases
Right ventricle forces blood into the
  1. Aortic arch
  2. Pulmonary arch
  3. Superior vena cava
  4. Inferior vena cava
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