NEET 1998 · Class 12
Ecosystem
The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem's
- (A)net secondary productivity
- (B)gross primary productivity
- (C)net primary productivity
- (D)gross secondary productivity
The NCERT line that answers it
Verbatim line**Gross primary productivity** of an ecosystem is the rate of production of organic matter during photosynthesis.
- Chapter
- Ecosystem
- Section
- 12.2 PRODUCTIVITY
- Page
- 2
- Words matched
- 16 of 16
The answer appears as a continuous sentence in NCERT. This is that sentence.
How this line gives the answer
0, emb=1.0, combined=1.0). Verified: high — The span explicitly defines gross primary productivity as 'the rate of production of organic matter during photosynthesis,' which directly matches the question's definition of 'the rate at which light energy is converted into chemical energy of organic molecules.'
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Question text is reproduced from the published NEET 1998 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.