Match List I with List II
| LIST I | LIST II |
|---|---|
| A. One species is benefitted and other harmed. | I. Amensalism |
| B. One species is benefitted and other neither harmed nor benefitted. | II. Parasitism. |
| C. Both the interacting species are benefitted. | III. Commensalism |
| D. One species is harmed and other remains unaffected. | IV. Mutualism |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → A-II, B-III, C-IV, D-I
A. One species is benefitted and other harmed. — this matches II. Parasitism. For example, the human liver fluke.
B. One species is benefitted and other neither harmed nor benefitted. — this matches III. Commensalism. For example, the orchid growing on a mango branch.
C. Both the interacting species are benefitted. — this matches IV. Mutualism. For example, lichens.
D. One species is harmed and other remains unaffected. — this matches I. Amensalism. One species is harmed, the other unaffected.
Note: A similar question was also asked in CUET (UG) 2026 on 06-06-2026 (Slot 1) and on 26-05-2026 (Slot 1), and in CUET (UG) 2024 on 15-05-2024 (Slot 1).
NCERT Extract:
Population Interactions – “… Both the species benefit in mutualism and both lose in competition in their interactions with each other. In both parasitism and predation only one species benefits (parasite and predator, respectively) and the interaction is detrimental to the other species (host and prey, respectively). The interaction where one species is benefitted and the other is neither benefitted nor harmed is called commensalism. In amensalism on the other hand one species is harmed whereas the other is unaffected.”