Guilford High School
AP Bio Homework
Chapter 32

Transport In Plants

1. At what place in the plant is water potential the greatest - at the roots or the air spaces in the leaves? (see p 702)

2. Name and describe the three routes for lateral transport of solutes and water in plant tissue.

3. What are plasmodesmata?

4. Describe the construction and functions of the endodermis in the root.

5. Name and describe the four factors which contribute to the upward pull of sap in the xylem.

6. How do stomata open and close?

7. Name the environmental factors which have an effect on stomata control.

8. What is translocation?

9. What are sinks?

10. Describe the pressure flow (a.k.a. bulk flow) hypothesis.

11. The diameter of a tree varies during a 24 hour period. When would it be the narrowest, and why?