Class IX

Plant can be destarched in
  1. 14 hours
  2. 24 hours
  3. 42 hours
  4. 48 hours
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
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
Respiration carried out in absence of oxygen is
  1. aerobic respiration
  2. anaerobic respiration
  3. cellular respiration
  4. fermentation
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