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?
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Question

Quizplus · Accepted Answer

N₂ (nitrogen gas) is not a form of nitrogen that can be used by plants. It must first be converted into other forms, such as ammonia (NH₃) or nitrate (NO₃⁻), through a process called nitrogen fixation.

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