Which of the following have species that can establish symbiotic relationship with other organisms?
- 1.Cnidarians
- 2.Fungi
- 3.Protozoa
Select the correct answer using the code given below.
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Answer: D. Cnidarians like corals live with algae called zooxanthellae. Fungi form lichens with algae and mycorrhiza with plant roots. Protozoa live in termite guts to digest wood. So all three have symbiotic species.
Watch for: Students forget corals are cnidarians and have symbiotic algae.
Why the other options are wrong
- A. Wrong because protozoa also form symbioses, such as in termite guts.
- B. Wrong because cnidarians like corals have symbiotic algae.
- C. Wrong because fungi form lichens and mycorrhiza.
Source to check: NCERT Class 11 Biology, Chapter 2 Biological Classification and Chapter 4 Animal Kingdom
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.