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Post-Test
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1
The evaporation of water from the surface of a plant is a process most accurately referred to as
A)photosynthesis.
B)transpiration.
C)respiration.
D)plasmolysis.
E)guttation.
2
Which of the following forms of transport in plants requires the use of membrane proteins?
A)Passive transport
B)Passive diffusion
C)Facilitated diffusion
D)Passive diffusion and facilitated diffusion
E)Passive transport and facilitated diffusion
3
Which of the following forces does not influence bulk flow?
A)Gravity
B)Adhesion of water to walls of conducting cells
C)Cohesion of water molecules
D)Evaporation of water at plant surfaces
E)All of the forces influence bulk flow.
4
Which of the following forms of tissue-level transport utilizes Plasmodesmata?
A)Transmembrane transport
B)Apoplastic transport
C)Symplastic transport
D)Facilitated diffusion
E)All of the choices are forms of tissue-level transport requires the use of Plasmodesmata.
5
Which of the following would be most negatively affected by air bubbles present in xylem tissue?
A)Vessel elements
B)Tracheid elements
C)Root pressure
D)Pits
E)Guard cells
6
Which of the following factors influences cellular water potential?
A)Turgor pressure within cells
B)Solute concentration inside and outside cells
C)Pigment types within mesophyll layers
D)Turgor pressure within cells and solute concentration inside and outside cells
E)Turgor pressure within cells, solute concentration inside and outside cells, and pigment types within mesophyll layers
7
True or False: A plant cell with a solute concentration equal on the inside and outside would have a pressure potential of 0 MPa.
A)True
B)False
8
Which one of the following statements about plant adaptations to osmotic stress is correct?
A)Plants under arid conditions typically decrease the number of aquaporins to prevent water loss.
B)Proteins referred to as dehydrins protectively bind to plasma membranes in some plants as the RWC increases.
C)Cold resistant plants prevent water from escaping by adjusting solute concentration in the cytosol.
D)Desiccation-tolerant plants typically stabilize their membranes by binding sugars to membrane proteins, forming a glasslike structure.
E)All of the statements about plant adaptations to osmotic stress are correct.
9
Soil, water, and dissolved minerals delivered along the apoplastic route require specific transporters to enter which one of the following tissue types?
A)Epidermis
B)Cortex
C)Endodermis
D)Xylem
E)Phloem
10
True or False: Xylem sap is the major source of minerals for leaves, while phloem sap is the major source of minerals for seeds and fruits.
A)True
B)False
11
Which of the following xylem cell types is alive when mature?
A)Parenchyma
B)Vessel elements
C)Tracheids
D)Vessel elements and tracheids
E)Parenchyma, vessel elements, and tracheids
12
The polymer that confers strength, durability, and waterproofing to tracheids is most accurately referred to as
A)Casperian strips.
B)auxin.
C)cellulose.
D)lignin.
E)starch.
13
Which of the following statements about water and mineral transport in xylem is incorrect?
A)Nonflowering plants have an abundance of vessels, while flowering plants rely more on vessel elements.
B)Tracheids and vessels have secondary lignin walls.
C)An embolism can be reversed by a process referred to as guttation.
D)Vessels are more susceptible to embolism than tracheids are.
E)None of the statements about water and mineral transport in xylem are correct.
14
True or False: The energy required to power bulk flow in the xylem is ultimately provided by pressure and gravity.
A)True
B)False
15
Which of the following represents a plant adaptation to restore proper water flow after an embolism?
A)Altering the structure of stomatal guard cells
B)Reduction in the thickness of leaf mesophyll layers
C)Leaf abscission
D)Root pressure
E)Guttation
16
Which one of the following plant hormones stimulates formation of an abscission zone?
A)Cytokinin
B)Auxin
C)Gibberellin
D)Abscisic acid
E)Ethylene
17
Which of the following is not part of the phloem tissue of flowering plants?
A)Sieve-tube elements
B)Parenchyma cells
C)Supporting fibers
D)Adjacent companion cells
E)All of the choices are part of the phloem tissue of flowering plants.
18
Which of the following statements most accurately describe how mature sieve-tube elements acquire proteins for functioning?
A)Sieve-tube elements are not living cells and therefore do not need protein.
B)Sieve-tube element proteins are supplied by intracellular symbionts.
C)Sieve-tube elements transcribe and translate their own proteins.
D)Sieve-tube elements are dependent on neighboring companion cells for mRNA and protein.
E)None of the choices accurately describe how mature sieve-tube elements acquire proteins for functioning.
19
Most plants transport sugar over long distances in the form of
A)glucose.
B)sucrose.
C)lactose.
D)fructose.
E)cellobiose.
20
The transport of organic molecules, driven by differences in turgor pressure between a sugar source and a sugar sink, is most accurately referred to as
A)translocation.
B)transpiration.
C)translation.
D)phloem loading.
E)sieving.





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