The correct answer for the question that is being presented above is this one: "b. sepal and petal." The structures in the diagram are not directly involved in sexual reproduction are the <span>sepal and petal. </span> The correct answer for the question that is being presented above is this one: "d. helping the plant convert the necessary nitrogen for use." Root nodules are associations between bacteria and plant roots responsible for helping the plant convert the necessary nitrogen for use.
