Question

Question 4
The two micro-organisms which live in symbiotic association in lichens are

(a) fungus and protozoa
(b) alga and bacteria
(c) bacteria and protozoa
(d) alga and fungus

Answer 1

(d) alga and fungus

In symbiotic association the two organisms are mutually beneficial to each other.
The two micro-organisms which live in symbiotic association in lichens are algae and fungus.
In Lichen, the algal part synthesises food and provides it to fungi whereas fungal part provides nutrients to algae as it has absorptive mode of nutrition.