Question

Population interactions may be beneficial or not. Write any three interactions in detail.

Answer 1

The interactions are as follows-

1) Mutualism is a relationship between individuals of two different species in which both are benefitted.

For example- nitrogen fixing Rhizobium bacteria lives in root nodules of leguminous plants. The bacterium does nitrogen fixation that benefits the plant and that in turn receives shelter from the plant.

2) Commensalism is an interaction in which one organism is benefited and the other is neither benefited nor harmed.

For example- Grazing animals such as cows disturb the grass and the insects that are living in them come out. The egrets are present on the back of the grazing animals and feed on these insects. The cattle is neither benefited nor harmed.

3) Predation- In this one organism kills and eats the other organism. The organism which kills is called the predator and the one that is killed is called a prey.

For example- A lion predates on a deer.