Home Biology Organisms and Populations Previous Year Questions If ‘+’ sign is assigned to beneficial intera…
Biology Organisms and Populations Previous Year Questions Single Correct MCQ
Published on: August 14, 2026

If ‘+’ sign is assigned to beneficial interaction, ‘−’ sign to detrimental and ‘0’ sign to neutral interaction, then the population interaction represent by ‘+’ ‘−’ refers to

A
Amensalism
B
Commensalism
C
Parasitism
D
Mutualism

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The correct answer is:
C

In a (+ , −) interaction, one species benefits while the other is harmed, which is characteristic of parasitism (also true for predation, but among the given options, parasitism fits best).

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