Microorganisms in Nutrient Cycles Flashcards
1
Q
Mycorrhizae
A
Certain types of fungi associate with roots of plants to increase the surface area for absorption of water and mineral ions, including phosphate ions.
2
Q
Free-Living Nitrogen-Fixing
Bacteria
A
In the soil, they reduce nitrogen gas to ammonia.
3
Q
Mutualistic Nitrogen-Fixing
Bacteria
A
Use nitrogen gas to produce amino acids
4
Q
Saprobiontic organisms
A
Break down dead organism to release phosphate, ammonia or ammonium
compounds
5
Q
Nitrifying bacteria
A
Free-living in soil, oxidise ammonium ions into
nitrites and nitrites into nitrates
6
Q
Anaerobic denitrifying
bacteria
A
Use nitrates in respiration to produce nitrogen gas
