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STD 12 - 12. ecosystem — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 12. ecosystem1 Mark
MCQ
The net primary productivity of an ecosystem is
  • ✓
    Total weight of green plants $-$ respiratory losses
  • B
    Total weight of green plants $+$ respiratory losses
  • C
    Respiratory losses alone
  • D
    None of the above
✓

Answer

Correct option: A.
Total weight of green plants $-$ respiratory losses
a
(a)The total stored energy in the form of organic matter (which is not used by the producer itself) is called net primary productivity $(NPP).$

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