Multiple choice

Nitrogen gas is found in the atmosphere. How does it enter plants?

  1. Through gas exchange in plant leaves

  2. By a plant forming a symbiotic relationship with ants

  3. By being fixed by nitrifying bacteria

  4. By being fixed by denitrifying bacteria

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

Plants cannot absorb nitrogen gas directly from the air. They rely on nitrogen-fixing bacteria, often in soil or root nodules, to convert nitrogen gas into a usable form like ammonia or nitrates.