Here is Question No. 70 a part of our series on UPSC Prelims 2021.
Q70. Which of the following have species that can establish symbiotic relationships with other organisms?
- Cnidarians
- Fungi
- Protozoa
Select the correct answer using the code given below.
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
Answer: (d)
- Some organisms coexist and share resources like food and shelter. The word symbiosis refers to this partnership.
- The first statement is true. The invertebrate class Cnidaria frequently has a symbiotic relationship with the single-celled dinoflagellate algae known as zooxanthellae.
- The second claim is true. Some fungi are found living inside plant roots. The fungus receives nutrients from the plants in exchange for water and specific nutrients from the plants. Algae and fungi coexist as lichen in a symbiotic relationship.
- The third statement is true. Additionally, protozoa develop symbiotic relationships with other creatures. Protozoan symbiosis mainly includes: a strong mutualistic relationship between a protozoan and a single-celled symbiont (such as bacteria, cyanobacteria, or single-celled algae), or between a protozoan and a multicellular organism (ruminants, lower termites, wood-eating cockroaches, plants)
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