explain co exicitance with suitable example.

Solution:

Co-existence refere to the phenomenon in which two or more organisms live together at the same point of time at the same place. 

Species undergoing interspecific competition in nature promotes coexistence rather than total exclusion. 
Interspecific competition means the competition between different species for food, shelter etc. Species undergoing interspecific competition in nature promotes coexistence rather than total exclusion by the mechanism like resource partitioning. For instance, if two species compete for same resource, they can avoid competition by choosing different time for feeding or different foraging patterns.

MacArthur showed that five closely related species of warblers living on the same tree were able to avoid competition and co-exist due to the behavioural differences in their foraging activities. This mechanism is known as resource partitioning.

P.S. The question was not clear. Hence, I have explained about co-existence as well as how co-existence plays an important role in interspecific competition. In case you had something else in mind, kindly post the correct and complete question again so that our experts can provide you with meaningful help. Looking forward to hearing from you soon.

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