Describe the relationship between two organisms in which both organisms benefit from the relationship

Symbiosis

Explanation:

Symbiosis is a physical association between two different organisms whereby both benefit from the relationship. A good example is the lichens. These are composite plants consisting of blue-green algae within the mycelial mass of fungus. The algae are provided with a means of attachment. They also obtain water, carbon dioxide and mineral salts from the fungus. The fungus obtains oxygen and carbohydrates made by algae through photosynthesis.

b - the respond is innate and varies over time.

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