Question

Which of the following relationship between organism is an example of mutualism, where both are benefited A)Lichen B) rhizobium C)pilot fisg-shark D) Both (A) and(B)

Answer 1

Answer:

both a and b

Explanation:

lichens is the name given to symbiotic relationship between fungus and algae .this is the most important example of mutualism .rhizobium is a type of gram negative bacteria which is found in the root nodules of certain plants like legumes. it helps in fixing nitrogen in the soil in the form of ammonia by certain enzymes which is then used up by plant . algae gives food to the fungus and fungus gives protection to the algae. similarlyrhizobium bacteria provides nitrogen as food to the plant and plant provide protection in its root nodules.

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