Multiple choice

Which one of the following essential elements can be obtained by land plants directly from the air?

  1. Carbon

  2. Nitrogen

  3. Phosphorus

  4. Hydrogen

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

Land plants obtain carbon directly from the atmosphere in the form of carbon dioxide (CO2) during photosynthesis. Other elements like nitrogen and phosphorus are primarily absorbed from the soil.