Class XI

Under natural conditions, atmospheric carbon dioxide (CO2) remains stable at
  1. 0.0003
  2. 0.0006
  3. 0.0013
  4. 0.0016
Instrument to measure blood pressure is called as
  1. Sphygamometer
  2. Sphygmomanometer
  3. Sphygmomanometer
  4. Sphygmanometer
 Intelligence of an animal can be judged through size of
  1. Brain
  2. Medulla oblongata
  3. Cerebral hemisphere
  4. Cerebellum
Bacteria capable to produce their own food are called as
  1. Saprophytes
  2. Parasites
  3. Autotrophs
  4. Penicillin
Neutral point like water (H2O) has a pH of
  1. 7
  2. 5
  3. 3
  4. 10
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