Chapter 05 – Roots and Soils
Chapter 05
Roots and Soils
Multiple Choice Questions
1. A root system may function in which of the following?
2. In addition to anchoring a plant, roots usually function directly in which of the following
processes?
Chapter 05 – Roots and Soils
3. Typical root systems form up to _____________ of the total dry biomass of a plant.
4. Which of the following is a part of the embryo of a seed?
5. ____________ root systems develop from the radicle.
Chapter 05 – Roots and Soils
6. Roots that develop from an organ OTHER than an existing root are called
7. Monocots, such as grasses, usually have __________ root systems.
8. The perception of gravity by a root takes place in
Chapter 05 – Roots and Soils
9. In traversing the root to the central xylem vessels, the last living tissue that water passes
through before entering the xylem is the
10. Cells of the apical meristem
Chapter 05 – Roots and Soils
11. The tissue adjacent to the endodermis toward the center of a root is the
12. Which of the following cells is relatively thin-walled?
Chapter 05 – Roots and Soils
13. Which of the following tissues is common in roots but not in stems?
14. Parts of the pericycle and parenchyma between the arms of xylem and patches of phloem
in young roots of many dicots and conifers become
15. The most abundant cell type in periderm is
Chapter 05 – Roots and Soils
16. When trees undergo root grafting with one another, an unfortunate result can be
17. Root hairs are prominent in the
18. The perception of gravity by roots is aided by
Chapter 05 – Roots and Soils
19. Rhythmic cell divisions in young roots often
20. Cells of an endodermis that do not have Casparian strips are
21. The tissue in which a cork cambium first develops in woody dicot roots is the
Chapter 05 – Roots and Soils
22. Cells of the root cap ease the growth of young roots through the soil by __________.
23. The region of cell division in a root is also known as __________.
Chapter 05 – Roots and Soils
24. The region of elongation is characterized by ______________.
25. How do lateral roots differ from root hairs?
Chapter 05 – Roots and Soils
26. How does monocot root structure differ from dicot root structure?
27. Root hairs are found in the region of the root called the
Chapter 05 – Roots and Soils
28. This tissue (region) is present in monocot roots but absent in dicot roots.
29. One unique function of the root cap is
Chapter 05 – Roots and Soils
30. Root hairs
31. Stored food, especially starch and other carbohydrates in storage roots, can be found in
this tissue of a root
Chapter 05 – Roots and Soils
32. A unique feature of the pericycle is
33. Which of the following is NOT a specialized root?
34. Specialized roots that permit aquatic plants to facilitate gas exchange are called