| Term | Definition |
|---|
| 1 | Plants take nitrate ions from soil |
| 2 | They are used by plants to produce nitrogen containing compounds like protein |
| 3 | Primary consumers eat plants and protein is digested to form amino acids, which are then absorbed into the gut and are usedto make up the tisses of the primary consumer |
| 4 | This process is repeated when primary consumers are eated by secondary consumers. Nitrogen is passed from one trophic level ot the next. |
| 5 | Plants and animals die and thier bodies contain nitrogen containing compounds. animals also exrete nitrogenous substance like urea. |
| 6 | Nitrogen containign compounds are difested by decomposers releasing ammonium ions into the soil |
| 7 | Nitrofying bacteria convert the ammonium ions into nitrites and then to nitrates |
| 8 | In anaerobic conditions, Denirtrfying bacteria are found in large numbers, using nitrates as a supply of O2 for respiration. Nitrates are reduced to nitrogen gas, less nitrates are available for plants. |
| 9 | Nitrgen gas can be made for plants by Nitrogen fixation; Nitrogen fixing bacteria live in soil and are associate with leguminous plants. they convert nitrogen into ammonium compounds. Nitrogenase only works in anearboic conditions and it requires lots of engery |
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