Question

the conversion of nitrogen gas in the atmosphere (n₂) to a form that plants can use is called

□ transpiration

□ respiration

□ nitrogen fixation

□ assimilation

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Explanation:

• Transpiration is the process of water movement through a plant and its evaporation from aerial parts, mainly leaves.
• Respiration is the process by which organisms exchange gases (e.g., take in oxygen and release carbon dioxide) and break down organic substances to release energy.
• Nitrogen fixation is the process of converting atmospheric nitrogen gas (\(N_2\)) into forms (such as ammonia, nitrate) that plants can use.
• Assimilation is the process by which organisms incorporate nutrients into their cells and tissues.

Answer:

nitrogen fixation