Class XI

 Hydrochloric acid has a pH of about
  1. 2
  2. 3
  3. 7
  4. 13
Water and dissolved salts are carried through
  1. Veins
  2. Midrib of leaf
  3. Xylem
  4. phloem
In hypothalamus, heat gain center is activated if
  1. Day is cold
  2. Day is sunny
  3. If mammal is hairy
  4. If excess physical activities are done
Pupils are dilated to enhance vision due to production of
  1. ADH
  2. Elastin
  3. Adrenaline
  4. Myosin
Too much caffeine can damage the
  1. Heart
  2. Kidneys
  3. Pancreas
  4. Both A and B
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