Nitrogen must be "fixed" to convert it into a form which plants can use. Which of the following forms of nitrogen CANNOT be used by plants?

Name: Nitrogen must be "fixed" to convert it into a form which plants can use. Which of the following forms of nitrogen CANNOT be used by plants?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The correct answer is A, which represents N2 (dinitrogen). Plants cannot directly use N2 from the atmosphere; it must be fixed into a usable form such as ammonium (NH4+) or nitrate (NO3-).

Nitrogen Must Be "Fixed" to Convert It into a Form