Study Guide Exam IV Soils in the Environment 1. Know the difference between soil fauna and flora. 2. Know how mycorrhizae and plants are symbiotic. What is the benefit to the plant? 3. Know which soil micoflora have the greatest numbers and which have the greatest biomass. 4. Know which soil fauna have the greatest numbers and which have the greatest biomass. 5. Know the 3 fundamental ways that soil organisms are classified. (e.g. food source) 6. Know the difference between herbivores, detritivores, and predators. 7. Know the difference between autotrophic and heterotrophic organisms. 8. Know the difference between aerobic and anaerobic heterotrophic organisms. 9. Understand basically how energy is obtained by heterotrophs during respiration. 10. Understand the differences between aerobic and anaerobic respirative pathways in terms of electron acceptors and the amount of energy derived. 11. Know the diffusion rate of oxygen in water relative to its rate in air. 12. Know where the EAA is and the principal crop grown there.
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