What is symbiosis? Name a symbiotic life form. Mention specific organisms which display the symbiotic relationship in this life form.

It is a relationship between two organisms in which both of them are benefitted. Some fungal species live in permanent mutually dependent relationships with bluegreen algae (or cyanobacteria). Such relationships are called symbiotic. In this relationship, fungi get food from algae and in returen blue green algae get shelter. These symbiobic life forms are called lichens.

Lichen is formed by symbiotic association between an alga and a fungus.