Mutualism is such an interaction that is between the organisms belonging to two different species. Both the organisms are benefited from each other in some way through this kind of interaction. In almost all ecosystems, these kinds of interactions are seen commonly and play a significant role in ecology. They involve two types of exchanges i.e. either of resources such as food, shelter, or services such as transportation, protection.
There are two types of mutualism. If these interactions are very important for the growth, survival, and reproduction of the organisms, it is known as obligate mutualism. Whereas, if the organisms are getting benefit from each other but they are not dependent on each other for basic life processes then this is called facultative mutualism.
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