Class IX

Types of gametes produced by 2 pair of chromosomes can be
  1. 4
  2. 6
  3. 8
  4. 10
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
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
Consequences of water pollution includes
  1. discharge of untreated sewage
  2. burning of fossil fuels
  3. loss of habitat
  4. climatic changes
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