BIO 124 Lab PLant Structure Report

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PART 1

  1. What is the site for gas exchange on the leaf?

Select one:

  1. Guard cell
  2. Phloem
  3. Xylem
  4. Stomata

 

  1. What protects the leaf against desiccation and stress from other environmental factors?

Select one:

  1. Stomata
  2. Mesophyll
  3. Epidermis
  4. Cuticle

 

  1. What is the main function of the stem in a plant?

Select one:

  1. Transporting nutrients and water to the leaves
  2. Photosynthesis
  3. Absorption of water and minerals from the ground
  4. Avoiding desiccation of the plant

 

  1. Guard cells are located on the surface of the underside of leaves. How does this structure of the leaf enable the function of guard cells?

Select one:

  1. Because the guard cells are at the surface, they keep the stomata constantly open and therefore can help with the exchange of gases.
  2. Because the guard cells are at the surface, they keep the stomata constantly closed and therefore help prevent water loss.
  3. Because the guard cells are at the surface, they are exposed to sunlight and therefore can perform photosynthesis.
  4. Because the guard cells are at the surface, they are in constant contact with the atmosphere and therefore facilitate the exchange of gases

 

  1. Which tissue types comprise the vascular bundle in gymnosperms?

Select one:

  1. epidermis and xylem
  2. stomatal pore and mesophyll
  3. resin ducts and epidermis
  4. xylem and phloem

 

  1. Which of the following is characteristic of a monocot stem cross section?

Select one:

  1. vascular bundles that are spread evenly among the parenchyma
  2. vascular bundles that fill the entire cross section, leaving no room for parenchyma
  3. vascular bundles that are only at the periphery of the cross section
  4. vascular bundles that contain phloem only and no xylem

 

  1. How are the xylem and phloem arranged in a eudicot root?

Select one:

  1. The xylem is at the periphery of the root, whereas the phloem is at the center of the root.
  2. Eudicots do not have xylem and phloem in the roots.
  3. The xylem is at the center of the root, surrounded by several phloems.
  4. The xylem and phloem are arranged in rings at the periphery of the root.

 

  1. Which of the following is a major difference between monocot and eudicot roots?

Select one:

  1. In monocots, the xylem and phloem are at the periphery, whereas in eudicots, the xylem and phloem are located near the center of the root.
  2. Eudicot roots lack xylem and phloem, whereas monocot roots have both xylem and phloem.
  3. In eudicots, the xylem and phloem are at the periphery, whereas in monocots, the xylem and phloem are located near the center of the root.
  4. Monocot roots lack xylem and phloem, whereas eudicot roots have them arranged at the periphery of the root.

 

PART 2

What protects the leaf against desiccation and stress from other environmental factors? Select one: a. Stomata b. Mesophyll c. Epidermis d. Cuticle

  1. Match the monocot stem terms to their definitions.
a) support the stem structurally and are dead fibrous cells that have thick walls Answer choices: Parenchyma Phloem Sclerenchyma Xylem
b) transport water and nutrients up from the roots
c) characterized by large vacuoles, which store nutrients and food.
d) transport sugar formed in the leaves by photosynthesis to the rest of the plant to be used as food.

3. Match the eudicot stem terms to their definitions.

a)surrounds and protects the vascular bundle Answer choices: Parenchyma Collenchyma Pericycle Cambium Pith
b)center portion of the stem
c) located underneath the collenchyma
d) strengthen young stems and synthesize food
e) contains cells that divide to produce new xylem and phloem
  1. Suppose you chop down a plant in the woods and bring it home to examine. You cut a cross section of the stem and you note that it has pith in the center. How would you classify this plant?
  2. You encounter a shrubby-looking plant that you cannot tell if it has true wood or not. Upon cutting it open cross-sectionally, you note a layer of cork cambium. What does this tell you?

 

In the leaf cross-section slide, which of the following layers was nearest the surface of the leaf?

Select one:

  1. upper epidermis
  2. palisade layer
  3. cuticle
  4. spongy layer

 

Where is the pith in a monocot root located?

 

How are the xylem and phloem arranged in a eudicot root?

  1. the xylem is at the center of the root, surrounded by several phloems
  2. eudicots do not have xylem and phloem in the roots
  3. the xylem is at the periphery of the root, whereas the phloem is in the center of the root
  4. xylem and phloem are arranged in rings in the periphery of the root

 

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?

Part 4

  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:

  1. Because roots lack a cuticle, they can absorb water and nutrients freely from the soil.
  2. Because roots lack a cuticle, they are not exposed to ultraviolet light, and therefore do not need protection from it.
  3. Because roots lack a cuticle, the ability of the roots to grow is not impeded.
  4. Because roots lack a cuticle, the exchange of gas is enhanced.

 

  1. In the root of which of the following, are the xylems and phloems arranged in a ring?

Select one:

  1. gymnosperms
  2. eudicots
  3. monocots
  4. all plants

 

  1. 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:

  1. Flat leaves have a thicker coating of waterproof wax.
  2. Flat leaves have more surface area.
  3. Flat leaves have a thicker epidermis.
  4. The stomata of flat leaves are sunken into the leaf.

 

  1. Which tissue carries water and minerals to the rest of the plant from the roots?

Select one:

  1. parenchyma
  2. phloem
  3. pericycle
  4. xylem

 

  1. How do the cells of the xylem compare to the cells of the phloem?

Select one:

  1. The xylem cells have thin cell walls, whereas the phloem cells have thick cell walls.
  2. The xylem cells are large, whereas the phloem cells are small.
  3. The xylem cells have chloroplasts, whereas the phloem cells do not have chloroplasts.
  4. The xylem cells are square, whereas the phloem cells are round.

 

  1. What type of cell or structure stores food within the stem?

Select one:

  1. bark
  2. parenchyma
  3. vascular bundles
  4. cork cells

 

  1. From which part of the stem tissue is wood made?

Select one:

  1. spongy mesophyll
  2. the cuticle
  3. old layers of xylem and phloem
  4. central parenchyma

 

What is the function of the phloem?

Select one:

  1. Phloem carries nitrogenous wastes to the roots where the waste leaves the plant.
  2. Phloem carries water and minerals to the rest of the plant from the roots.
  3. Phloem carries water from the leaves to the rest of the plant.
  4. Phloem transports sugar down from the leaves to the rest of the plant.

 


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