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STD 12 - 12. ecosystem — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 12. ecosystem4 Marks
MCQ
$PAR$ stands for
  • A
    Photosynthesis Active Reaction
  • B
    Photosynthesis Absorb Radiation
  • ✓
    Photosynthetically Active Radiation
  • D
    Photosynthetically Active Reaction
✓

Answer

Correct option: C.
Photosynthetically Active Radiation
c
$PAR$ - Photosynthetically Active Radiation. The sum is the only source of energy for all ecosystems on earth. Out of the total incident solar radiation, only $50\; \%$ of it is photosynthetically Active Radiation $(PAR)$ Plantscapture only $2-10\; \%$ of the $PAR$ and this small amount of energy sustains the entire living world. So, there is unidirectional flow of energy from the sun to producers and then to consumer

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