Question

Lichen is usually cited as an example of ‘symbiosis’ in plants where an algal and a fungal species live together for their mutual benefit. Which of the following will happen if algal and fungal partners are separated from each other?
a. Both will survive and grow normally and independent from each other
b. Both will die
c. Algal component will survive while the fungal component will die
d. Fungal component will survive while the algal partner will die
Based on your answer how do you justify this association as symbiosis.

Answer 1

Symbiosis is defined as an interaction between species where both the species can be benefitted.

A lichen is a stable symbiotic association between a fungus and algae:

● Fungi require carbon as a food source which is satisfied by the algae due to the latter’s ability to undergo photosynthesis.

● Fungi provides algae with optimal living conditions and improved access to water and mineral nutrients.

Separation of these two counterparts would result in disruption of their basic needs and thus will affect their survival. Hence, lichen is an example of symbiosis.

Hence, the correct answer is b. both will die.