If there was no $CO_2$ in the earth's atmosphere, the temperature of earth's surface would be

  • [AIPMT 1998]
  • A

    As such

  • B

    Less than the present level

  • C

    Increase from present level

  • D

    Dependent upon oxygen amount of the environment

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In which of the following habitats does the diurnal temperature of soil surface vary most

  • [AIPMT 2004]

Plants of salty seashore wet-lands are called