Class VIII

Most of bacteria in food is killed in stomach by
  1. HCl
  2. NaCl
  3. HNO
  4. H2O
Bacteria are
  1. non-living
  2. unicellular organisms
  3. multicellular organisms
  4. complex organisms
Diseases which are caused by micro-organisms are called
  1. contagious
  2. venereal
  3. infectious
  4. incurable
A medicine which contain dead or weakened germs is used to prevent infectious disease is called a
  1. antiseptic
  2. antibodies
  3. antibiotics
  4. vaccine
Human skin is tough and water proof and germs cannot
  1. penetrate through
  2. stay on it
  3. reproduce
  4. enter from cut
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