Which of the following have species that can establish symbiotic relationship with other organisms?<br/>1. Cnidarians<br/>2. Fungi<br/>3. Protozoa<br/><br/>Select the correct answer using the code given below.

1. Cnidarians — Correct. Many cnidarians, especially corals and sea anemones, live in symbiosis with algae such as zooxanthellae.

2. Fungi — Correct. Fungi commonly form symbiotic associations, e.g. lichens (with algae/cyanobacteria) and mycorrhizae (with plant roots).

3. Protozoa — Correct. Several protozoans live symbiotically with other organisms; for example, protozoa in the gut of termites help digest cellulose.

Hence, all three have species capable of symbiotic relationships.