Multiple choice

Most of the plants obtain nitrogen from the soil in the form of

  1. nitric acid

  2. nitrites

  3. nitrates

  4. free nitrogen gas

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

While plants can absorb nitrogen as ammonium, the most common and abundant form of nitrogen uptake from the soil is nitrate (NO3-). Nitrates are highly soluble and easily transported through the plant's xylem.