AP Environmental Scienceeasymcq1 pt
Which organisms convert atmospheric N₂ into a usable form?
A.Nitrogen-fixing bacteria
B.All plants
C.Fungi
D.Herbivores
Explanation
Core Concept
Only certain bacteria (free-living or in legume root nodules) break the N≡N triple bond into ammonia that life can use. Plants cannot fix nitrogen themselves.
Correct Answer
ANitrogen-fixing bacteria
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