Primary Production and Energy Flow — NEET Biology
✅ Asked in NEET 2022(NEET 2022 – Phase 2) The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called:
(NEET 2022 – Phase 2) The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called:
Answer & NCERT explanation
Correct answer: C — Primary Production
Primary Production is the total amount of biomass or organic matter produced per unit area over time by plants during photosynthesis. NCERT defines it as the rate of production of organic matter by autotrophs. It includes both GPP (total photosynthesis) and NPP (after respiratory losses). Other options are specific types: GPP is gross rate, NPP is net rate after respiration, and secondary production refers to heterotroph biomass production.
Read more NCERT concept on the PYQ
A constant input of solar energy is the basic requirement for any ecosystem to function and sustain. Primary production is defined as the amount of
Primary production is the amount of biomass (organic matter) produced by autotrophs per unit area per unit time, measured as kg/m²/year. Students often confuse it with gross primary production (GPP) vs. net primary production (NPP) — remember NPP is what actually remains available for herbivores after plants use energy for respiration. The NEET trap: questions may ask about energy available at different trophic levels, where you must use NPP, not GPP. Key point: Only about 10% of NPP is available to the next trophic level (the 10% law), so understanding primary production is essential for calculating energy transfer through ecosystems.
What does NCERT say about constant input solar energy?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.