Which of the following have species that can establish a symbiotic relationship with other organisms?1. Cnidarians2. Fungi3. ProtozoaSelect the correct answer using the code given below
✓ Correct answer: d) 1, 2 and 3
ExplanationAll of the given species can establish a symbiotic re- lationship with other organisms.Symbiotic Relationship:A relationship between two (or more) species that may or may not be advantageous to one or both is referred to as symbiotic.Symbiosis typically occurs between different species.Interactions within the same species (intraspecific) are usually not categorized as symbiosis but may involve other forms of cooperation.For eg., Coral has a symbiotic relationship (each gives something to the other and gets something back in return) with ‘zooxanthellae’ microscopic algae which live on coral.Option 1 is correct: The relationship between cnidarians and dinoflagellate algae is termed “symbiotic” because both the an- imal host and the algae are benefiting from the association.It is a mutualistic interaction.Option 2 is correct: Two common mutualistic relationships in- volving fungi are mycorrhiza (fungi and plant roots) and lichen (fungi and either cyanobacteria or green algae).Option 3 is correct: Protozoa mostly represent a close mutual- istic association between a protozoa
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