Q. Which of the following have species that can establish symbiotic relationship with other organisms?
Select the correct answer using the code given below.
Why this question: Important static topic
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