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6. write the balanced symbol equation for N2+H2-->NH3
- N+H-->NH
- N2+H2-->NH4
- N2+3H2-->2NH3
- N2+H2-->N2H2
7. The energy is faeces can be used by other organisms, describe how?
- eaten by decomposers
- broken down by decomposers such as beetles or insects
- used as manure
- eaten by animals
8. how do plant fertilisers increase crop yield?
- fertilisers replace essential elements used by previous crop / provide extra essential elements + used to build plant amino acids
- fertilisers contain essential minerals
- fertilisers contain essential nutrients
- they contain potassium
9. Write about biochemical adaptations to very cold climates.
- contain enzymes with lower optimum temperatures but cells do not freeze as freezing would damage cells
- enzymes spread easier on smaller surface areas
- larger leaves absorb more sunlight
- The smaller the plant the less energy is needed so more can be spent on specific parts of the plants