Two green plants are kept separately in oxygen free containers,

Question:

Two green plants are kept separately in oxygen free containers, one in dark and the other in continuous light. Which one will live longer ? Give reasons. (CCE 2010)

Solution:

Plant kept in continuous light will live longer due to

  1. Manufacture of food and hence its availability to the plant for maintenance and growth,
  2. Production of oxygen in photosynthesis and its availability for respiration of the plant. Plant kept in oxygen free container kept in dark will die within a few days due to non-availability of food and oxygen.

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