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Discuss the various types of positive in...

Discuss the various types of positive interactions between species.

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In positive interspecific interactions members of either one or both the interacting species are benefited but neither is harmed. These are of following types:
Hints :
(i) Define and Give tow example of Protocooperation.
(ii) Define and Give two examples of Mutualism.
(iii) Define and Give two examples of Commensalism.
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