Apentix/AP Environmental Science/Unit 1: The Living World: Ecosystems/Question

AP Environmental Sciencemediummcq1 pt

Which sequence correctly orders the nitrogen cycle?

A.Fixation → nitrification → assimilation → ammonification → denitrification

B.Denitrification → fixation → nitrification

C.Assimilation → fixation → ammonification

D.Nitrification → denitrification → fixation

Explanation

Core Concept

N₂ is fixed to ammonia, oxidized to nitrate, absorbed by plants, returned to ammonia by decomposers, then converted back to N₂ gas.

Correct Answer

AFixation → nitrification → assimilation → ammonification → denitrification

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