1. Explain the relationship between soil particle size and the field capacity of soil.
2. Explain why the availability of water to plants is highest in soils with particle sizes intermediate between sand and clay.
3. How can we be sure that root pressure is not sufficient to explain the movement of water in trees?
4. Explain how light serves as the ultimate source of energy for a meat-eating animal.
5. Why is C3 photosynthesis inefficient when the concentration of CO2 in a leaf is low?
6. How do CAM plants solve the problem of obtaining CO2 for photosynthesis while minimizing water loss?
7. Explain how plants use structural adaptations to reduce water loss.
8. Describe the costs and benefits associated with the different nitrogen products excreted by fish, mammals, and birds.
9. Explain the concept of a negative feedback.
10. If a snake is lying on a rock in the desert sun, how is the snake’s body temperature affected by radiation, conduction, convection, and evaporation?
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