Which of the following is an example of mutualism? (1 point)
a)bacteria live in root nodules of a plant, processing nitrogen into ammonia for the plant and receiving protection and a steady food supply in return.(my answer)
b)moss benefits from exposure to light and moisture as it grows on a tree trunk that is not affected by its presence.
c)fleas live in the fur of a dog where they periodically pierce the dog’s skin and feed on its blood.
d)cowbirds lay their eggs in the nests of other birds that are often tricked into rearing the cowbird chicks instead of their biological chicks.

The correct answer is A. Bacteria live in root nodules of a plant, process nitrogen to ammonia for the plant, receive protection and steady food supply which is being got in return.

Mutualism is referred to as the way two organisms which are of different species exist in relationship whereby every individual benefits from activity of each other.

The relationship which is between bacteria and ungulates with the intestine is or good example of mutualism.

Mutualism plays an important role in ecology. We can say that if we measure the exact fitness what we get as a benefit is a mutualistic relationship.