Nitrogen fixation converts atmospheric nitrogen into ammonia or nitrates through processes like lightning, the Haber process, or by nitrogen-fixing bacteria (free-living or mutualistic with legumes).
- lightning forms nitrate from N2 in the atmosphere - haber process forms ammonia from N2 and H2 - free living nitrogen-fixing bacteria - reduce nitrogen gas to ammonia - use ammonia to synthesise amino acids - amino acids released into soil when they die - mutualistic nitrogen-fixing bacteria - in root nodules of legumes - obtain carbohydrates form plants for energy - plants obtain amino acids
| Front | What happens in nitrogen fixation? |
|---|---|
| Back | - lightning forms nitrate from N2 in the atmosphere - haber process forms ammonia from N2 and H2 - free living nitrogen-fixing bacteria - reduce nitrogen gas to ammonia - use ammonia to synthesise amino acids - amino acids released into soil when they die - mutualistic nitrogen-fixing bacteria - in root nodules of legumes - obtain carbohydrates form plants for energy - plants obtain amino acids |
Tags: nutrient_cycles
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card: Denitrification denitrifying bacteria convert nitrates nitrogen gas
Previous card: Oxidise nitrite nitrification chemotrophic nitrifying bacteria ammonium nitrate
Up to card list: AQA A Level Biology