Q. 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.
Why this question: Important static topic
Ans) d
Exp) Option d is correct.
Some organisms live together and share both shelter and nutrients. This relationship is called symbiosis.
Statement 1 is correct. Cnidaria is an invertebrate phylum which often involves in a symbiotic relation with the unicellular dinoflagellate algae, called zooxanthellae.
Statement 2 is correct. Certain fungi live inside the roots of plants. The plants provide nutrients to the fungus and, in return, the fungus provides water and certain nutrients. Fungi also lives in a symbiotic relation with algae as a lichen.
Statement 3 is correct. Protozoa also forms symbiotic relations with other organisms. Symbiosis in protozoa mostly represents:
- a close mutualistic association between a protozoan and unicellular symbiont (like bacteria, cyanobacteria or/and unicellular algae) or
- protozoans and a multicellular organism (ruminants, lower termites, wood-eating cockroaches, plants)
Source) NCERT class-7 PAGE-7
https://www.biology-today.com/general-zoology/symbiotic-relationship-of-protozoans/
Subject) Environment
