NEET 2022 · Class 12

Organisms and Populations

If '8' Drosophila in a laboratory population of '80' died during a week, the death rate in the population is ______ individuals per Drosophila per week. [NEET-2022]

  1. (A)0.1
  2. (B)10
  3. (C)1.0
  4. (D)zero

The NCERT line that answers it

Verbatim line

If 4 individuals in a laboratory population of 40 fruitflies died during a specified time interval, say a week, the death rate in the population during that period is $4/40 = 0.1$ individuals per fruitfly per week.

Chapter
Organisms and Populations
Section
11.1 Populations
Page
3
Words matched
36 of 36

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 NCERT span explicitly demonstrates the exact calculation method for death rate (deaths/total population) with a parallel example (4/40 = 0.1), which directly applies to the NEET question (8/80 = 0.1).

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Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.

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Question text is reproduced from the published NEET 2022 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.