Nutrient Cycles Flashcards
1
Q
Carbon cycle
A
- decay
- respiration
- decomposition
- ## atmosphere
2
Q
Nitrogen fixation
A
- nitrogen gas into nitrogen containing compounds
- nitrogwn fixing bacteria or lightning or harbour process
- nitrogen to ammonia
3
Q
Nitrogen fixing bacteria name
A
Rhizobium
- with enzyme nitrogenase, converts nitrogen and hydrogen into ammonia
4
Q
Ammonification
A
- nitrogen into ammonia from dead organisms
- saphrophites in soil
5
Q
Nitrification
A
- ammonium ions oxidised to nitrates
- plant uses
- nitrifying bacteria converts
- ammonia - nitrites - nitrates
6
Q
Denitrification
A
- denitrifying bacteria uses nitrates in soil during respiration
- produced nitrogen gas to atmosphere
- anaerobic conditions
7
Q
Phosphorus used for …
A
- atp
- phospholipids
- nucleic acids
8
Q
Phosphorus cycle
A
- no gas stage
- in soil due to erosion
- absorbed by plants
- passed to animals during feeding
- saphrofites break down organic molecules and release phosphate ions into soil
9
Q
Fertilisers
A
- eutrophication
10
Q
Mycorrhizae
A
- fungus
- symbiotic relationship
- ## extends plants root system to absorb more water and minerals
