NEET 2022 · Class 12

Organisms and Populations

While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (–) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one species and (–) for another species involved in the interaction?

  1. (A)Predation
  2. (B)Amensalism
  3. (C)Commensalism
  4. (D)Competition

The NCERT line that answers it

Verbatim line

Depending on the outcome, these interactions between two species are classified as competition (both species suffer), predation and parasitism (one benefits and the other suffers), commensalism (one benefits and the other is unaffected), amensalism (one is harmed, other unaffected) and mutualism (both species benefit).

Chapter
Organisms and Populations
Section
11.1.4 Population Interactions
Page
15
Words matched
44 of 44

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

8571, emb=1.0, combined=0.9429). Verified: high — The span explicitly states 'predation and parasitism (one benefits and the other suffers)', which directly matches the question's requirement of an interaction with (+) for one species and (–) for another.

We did this for 1,565 questions.

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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