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AP Environmental Science Ert 1 E Explain the Steps and Reservoir Interactions in the Nitrogen Cycle Questions

Practise nitrogen-cycle questions by tracing fixation, nitrification, denitrification and reservoir transfers, then apply those processes to diagrams and ecosystem scenarios.

Syllabus
Effective Fall 2025
Course
AP Environmental Science

Exam points

  • identify the governing concept or relationship in the problem
  • justify the result with equations, diagrams or contextual evidence

AP Environmental Science Ert 1 E Explain the Steps and Reservoir Interactions in the Nitrogen Cycle Questions question 1

[Maximum number: 1]

The image below is of the nitrogen cycle. Which of the following steps takes the most amount of nitrogen and adds it to the atmosphere?

Figure for Question AP Environmental Science Ert 1 E Explain the Steps and Reservoir Interactions in the Nitrogen Cycle Questions question 1 — AP Environmental Science
A

Plants

B

Lightning

C

Denitrifying bacteria

D

Decomposers

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