- Nitrogen fixing bacteria - these fix the N2 in the air into useful nitrogen compounds which the plants can use.
- Nitrifying bacteria - these turn ammonia in decaying matter into nitrates.
- Decomposers - these break down proteins and urea (from decaying matter and faeces) into ammonia.
- Denitrifying bacteria - these convert nitrates back into N2 gas. These are of no use to us.
The ultimate guide to IGCSE Biology. Work hard, get an A* - it's not as hard as you think! Follow for weekly updates!
Sunday, 15 June 2014
4.10 describe the stages in the nitrogen cycle, including the roles of nitrogen fixing bacteria, decomposers, nitrifying bacteria and denitrifying bacteria (specific names of bacteria are not required).
Labels:
Nitrogen Cycle,
Paper 2
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment