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
- Manufacture of food and hence its availability to the plant for maintenance and growth,
- 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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