A clear-cut example of mutualism is found in?

Question

A. cows
B. lichens
C. night-flying moths
D. carnivores that feed on herbivores

Answer 1

The answer is certainly B. lichens- A mutual relationship between certain types of blue green algae and fungus of group ascomycetis and basidiomycetis.
A mutual relationship is the one in which both the associated species are benifited.In this case algae provides food to fungus and fungus in turn provides protection to algae.

Answer 2

B.lichens. in lichens the algae and the fungi are symbiotically interdependent. the algae provides the fungi with nutrition whereas the fungi provides the algae with protection.
it is also considered as an example of 'helotism'(ahmedinejan),i.e. fungi is considered to be dominant over algae in this particular association.

Answer 3

Lichens - an alga and a fungus