UPSC CSE Prelims
Question 47
Which of the following have species that can establish symbiotic relationship with other organisms?
- Cnidarians
- Fungi
- Protozoa
Select the correct answer using the code given below.
View correct answer and explanation
Correct answer: D
Correct Option: D (1, 2 and 3)
Explanation: Coral cnidarians host photosynthetic symbionts, fungi form lichens and mycorrhizae, and protozoa can live symbiotically in animal hosts.
Statement / Pair / Item-wise Analysis:
1. Correct / qualifies - Many corals (cnidarians) host photosynthetic dinoflagellates.
2. Correct / qualifies - Fungi form symbioses in lichens and mycorrhizal roots.
3. Correct / qualifies - Some protozoa live symbiotically in termite guts or other hosts.
Option-wise Analysis:
A. Incorrect-omits valid item 3 (Some protozoa live symbiotically in termite guts or other hosts).
B. Incorrect-omits valid item 1 (Many corals (cnidarians) host photosynthetic dinoflagellates).
C. Incorrect-omits valid item 2 (Fungi form symbioses in lichens and mycorrhizal roots).
D. Correct-selects exactly the supported statements/items: 1, 2, 3.