Class IX

Arsenic is an example of
  1. organic waste
  2. inorganic waste
  3. acid
  4. base
Types of gametes produced by 2 pair of chromosomes can be
  1. 4
  2. 6
  3. 8
  4. 10
Most fertile layer of soil is
  1. top layer
  2. organic layer
  3. middle soil layer
  4. middle soil layer
Carbon dioxide (CO2) concentration is measured in blood through
  1. biosensors
  2. receptors in lungs
  3. receptors in esophagus
  4. receptors in blood vessels in neck
All is true for local anesthesia, but,
  1. that it causes local numbness
  2. it causes a loss of sensation in area being injected
  3. contains Cocaine
  4. cause gastric ulcers
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