11 Jun Leaf epidermis and stem epidermis are both covered
Question
1. Leaf epidermis and stem epidermis are both covered by a waxy cuticle, but root epidermis is not. How does the lack of a cuticle reflect the function of the root?
Select one:
a. Because roots lack a cuticle, they can absorb water and nutrients freely from the soil.
b. Because roots lack a cuticle, they are not exposed to ultraviolet light, and therefore do not need protection from it.
c. Because roots lack a cuticle, the ability of the roots to grow is not impeded.
d. Because roots lack a cuticle, the exchange of gas is enhanced.
2. In the root of which of the following, are the xylems and phloems arranged in a ring?
Select one:
a. gymnosperms
b. eudicots
c. monocots
d. all plants
3. Flat leaves lose water to the environment more readily than pine needles do. Which statement describes a structural characteristic of flat leaves that accounts for this difference?
Select one:
a. Flat leaves have a thicker coating of waterproof wax.
b. Flat leaves have more surface area.
c. Flat leaves have a thicker epidermis.
d. The stomata of flat leaves are sunken into the leaf.
4. Which tissue carries water and minerals to the rest of the plant from the roots?
Select one:
a. parenchyma
b. phloem
c. pericycle
d. xylem
5. How do the cells of the xylem compare to the cells of the phloem?
Select one:
a. The xylem cells have thin cell walls, whereas the phloem cells have thick cell walls.
b. The xylem cells are large, whereas the phloem cells are small.
c. The xylem cells have chloroplasts, whereas the phloem cells do not have chloroplasts.
d. The xylem cells are square, whereas the phloem cells are round.
6. What type of cell or structure stores food within the stem?
Select one:
a. bark
b. parenchyma
c. vascular bundles
d. cork cells
7. From which part of the stem tissue is wood made?
Select one:
a. spongy mesophyll
b. the cuticle
c. old layers of xylem and phloem
d. central parenchyma
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