Multiple choice Nitrogen gas is found in the atmosphere. How does it enter plants? Through gas exchange in plant leaves By a plant forming a symbiotic relationship with ants By being fixed by nitrifying bacteria 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.