The symbols , -, and 0 are to be used to show the results of interactions between individuals and groups of individuals. The symbol denotes a positive interaction, - denotes a negative interaction, and 0 denotes where individuals are not affected by interacting. The first symbol refers to the first organism mentioned. What interactions exist between cellulose-digesting organisms in the gut of a termite and the termite?

A) +/+

B) +/-

C) 0/0

D) -/-

A) +/+

Explanation:

The form of interaction that exist between cellulose-digesting organisms in the gut of a termite and the termite itself is a +/+ interaction.

This is because the interaction of both organisms is beneficial to each of them. While the cellulose-digesting organisms are able to get their shelter in the gut of the termite, the termite benefits from the presence of these cellulose-digesting organisms by getting their cellulose-containing food materials digested by them.

Hence, it is a mutually beneficial interaction.

Option A is the correct option.

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