What is commensalism-biology?

Answer 1

It is when there are two organisms and one organism benefits from the relationship, the other sees no effect

e.g. remora and shark .

Answer 2

Commensalism is a type of symbiotic relationship between two organisms where one organism benefits while the other is neither helped nor harmed. The organism that benefits is known as the commensal, while the other organism is called the host. An example of commensalism is the relationship between barnacles and whales, where barnacles attach themselves to a whale's skin and benefit from the transportation and food availability provided by the whale without harming it.