Class XI

Special kind of protein containing iron is called as
  1. hormones
  2. hemoglobin
  3. red blood cell
  4. white blood cell
PH of succus entericus is
  1. below 7
  2. approx. 7
  3. above 7
  4. depends upon type of food to be digested
Pulmonary veins carry
  1. red oxygenated blood
  2. bluish red deoxygenated blood
  3. deoxygenated blood from heart to lungs
  4. oxygenated blood from lungs to heart
Systole means
  1. a "lub" sound
  2. ventricular relaxation
  3. closure of semilunar valves
  4. a "dub" sound
Guard cells of stoma are
  1. irregular in shape
  2. convex in shape
  3. long and cylindrical in shape
  4. kidney-shaped
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