With the help of examples differentiate between facultative symbiosis and obligate symbiosis.
Symbiosis is any type of a close and long-term biological interaction between two different biological organisms.The organisms that exhibit symbiosis are called individually called symbiont. These organisms (symbiont) may belong to same or different species. Symbiosis is of three types mutualistic, commensalistic, or parasitic. Symbiotic relationships can be obligate or facultative. In obligate symbiosis, one or both of the symbionts entirely depend on each other for survival. For example, in lichens, which consist of fungal and photosynthetic symbionts, the fungal partners cannot live on their own. In facultative symbiosis, the symbiont can live independently. For example, algal or cyanobacterial symbionts in lichens, such as Trentepohlia, can generally live independently, and their symbiosis is, therefore, facultative (optional).
Symbiosis is any type of a close and long-term biological interaction between two different biological organisms.The organisms that exhibit symbiosis are called individually called symbiont. These organisms (symbiont) may belong to same or different species. Symbiosis is of three types mutualistic, commensalistic, or parasitic. Symbiotic relationships can be obligate or facultative. In obligate symbiosis, one or both of the symbionts entirely depend on each other for survival. For example, in lichens, which consist of fungal and photosynthetic symbionts, the fungal partners cannot live on their own. In facultative symbiosis, the symbiont can live independently. For example, algal or cyanobacterial symbionts in lichens, such as Trentepohlia, can generally live independently, and their symbiosis is, therefore, facultative (optional).
