Answer:
1. Carbon Reservoir = g
2. Biosphere = J
3. Photosynthesis = e
4. Cellular Respiration = a
5. Producers = k
6. Consumers = f
7. Nitrogen-fixing Bacteria = i
8. Law of Conservation of Matter = c
9. Assimilation = b
10. Denitrifying Bacteria = L
11. Atmospheric Nitrogen = d
12. N03 and NH4 = h