5.1.21

The Nitrogen Cycle and Microorganisms

Test yourself

The Nitrogen Cycle and Microorganisms

The cycle of nitrogen through the ecosystem relies on microorganisms at many stages:

Illustrative background for DecompositionIllustrative background for Decomposition ?? "content

Decomposition

  • Microorganisms break down decaying matter and return nitrogenous compounds to the soil.
Illustrative background for NitrificationIllustrative background for Nitrification ?? "content

Nitrification

  • Nitrifying bacteria convert ammonium into nitrates.
Illustrative background for Nitrogen fixationIllustrative background for Nitrogen fixation ?? "content

Nitrogen fixation

  • Bacteria in plants' root nodules 'fix' nitrogen into a useable form for plants.
Illustrative background for DenitrificationIllustrative background for Denitrification ?? "content

Denitrification

  • Denitrifying bacteria remove nitrogenous compounds from the soil and release nitrogen back into the air.

Jump to other topics

1The Nature & Variety of Living Organisms

2Structure & Functions in Living Organisms

3Organism Functions

3.1Respiration

3.2Gas Exchange

3.3Transport

3.4Excretion

3.5Coordination & Response

4Reproduction & Inheritance

5Ecology

6Biological Resources

Unlock your full potential with Seneca Premium

  • Unlimited access to 10,000+ open-ended exam questions

  • Mini-mock exams based on your study history

  • Unlock 800+ premium courses & e-books

Get started with Seneca Premium