Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 35, Problem 2TYK
What important role does the Casparian strip play in the movementof water through plants?
a. forces water to move through the cytoplasm of living endodermal cells as it makes its way from the soil to the xylem
b. causes cells to shrink, thereby increasing pressure within cells
c. loads sugars into xylem, thereby causing water to enter the xylem by osmosis
d. acts as a filter that prevents salts, heavy metals, and other pollutants from entering root hairs
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Students have asked these similar questions
The process of bulk flow transports fluids in a plant. What are the two main bulk flow processes? *
A. Movement of water up the xylem and movement of solutes up and down the phloem
B. Movement of water up the phloem and movement of solutes up and down the xylem
C. Movement of water up and down the xylem and movement of solutes up the phloem
D. Movement of solutes up the xylem and movement of water up and down the phloem
E. Movement of solutes down the phloem and movement of water up and down the xylem
F. Movement of solutes down the phloem and movement of water up the xylem
Figure 2 shows the cross-section of a eudicot root.
i. Based on Figure 2, identify the structure that regulates the movement of water and minerals towards the xylem in the root.
ii. Name structure of the cell membrane allows it to act as a selective barrier?
iii. Predict what will happen to the transportation of water and minerals through the plasma membrane if the root was poisoned and no cellular respiration occurred
Which of the following is true for the function of xylem and phloem? *
A. Xylem transports water from leaves to roots; phloem transports sugar from roots to leaves
B. Xylem transports sugar from roots to leaves; phloem transports water from leaves to roots
C. Xylem transports water from roots to leaves; phloem transports sugar from leaves to roots
D. Xylem transports sugar from leaves to roots; phloem transports water from roots to leaves
Chapter 35 Solutions
Biological Science (7th Edition)
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- What is the main path of (movement of) inorganic substances in plants? Select one: a. Phloem b. Leaves c. Xylem d. Rootsarrow_forwardChoose the possible places a water molecule can go once it has traveled from the roots to a leaf cell. A. Return to the soil B. Release to the atmosphere C. Store in central vacuole D. Mitochondriaarrow_forwardDuring an experiment, a student covers all the stomata of a plant with nail polish, sealing them shut a)Predict how this would affect water transport b)How would this affect transport in the phloem?arrow_forward
- Guard cells surround stomata on the surface of leaves. A new herbicide targets the function of guard cells and prevents them from becoming flaccid and closing the stomata. What effect would the herbicide have on plants? a.Plants would dry out because guard cells protect the epidermis against desiccation. b.Plants would be eaten because guard cells protect leaves against herbivores. c. Plants would dry out because stomata would not be able to close. d.lt would regulate the intake of minerals in the plants.arrow_forwardWhich of the following would allow a plant to tolerate a cold environment? Group of answer choices A. producing small, smooth leaves with a small boundary layer B. generating sparsely placed leaf hairs to reflect solar radiation C. increasing the proportion of unsaturated fatty acids in cell membranes D. increasing evapotranspiration E. increasing the proportion of leaf mass relative to total body massarrow_forwardAccording to the pressure-flow model, sugar is actively transported into phloem anda. enters xylem, where it is moved toward the leaves due to transpiration.b. creates pressure to move water toward the roots.c. is transported out of the leaves through stomata.d. water follows by osmosis, providing pressure that moves the water and sugar through the phloem.arrow_forward
- Which of the following pathways best summarizes the route of a mineral that isabsorbed by a plant? a. Root hairs → epidermis → cortex → endodermis → pericycle → xylem b. Root hairs → epidermis → endodermis → cortex → xylem c. Root hairs → pericycle → endodermis → cortex → xylem d. Root hairs → endodermis → cortex → pericycle → xylemarrow_forwardDescribe how water and minerals move in xylem. Why is water and mineral movement in xylem unidirectional?arrow_forwardIn a lab, a scientist would like to explore the effect of solute concentration in the xylem on sugar transport in a plant. He adds salts and minerals to the xylem tissue to increase the solute concentration and a radioactive substance to the leaves that are incorporated into the sugars during photosynthesis. At some point he adds a substance to detect the radioactive material and finds that it is all still situated in the leaves and has not been transported to the sink. Explain, using the pressure flow or mass flow hypothesis why the sugar has not been transported to the sink (4).arrow_forward
- Water movement through the xylem needs less pressure than movement through living cells. A. Agree, because water moves in xylem through diffusion. B. Disagree, because water needs turgor pressure in order to diffuse. D. Disagree, beacuse both need equal pressure for materials to pass through xylem and living cells like sievetubes. C. Agree, because water is non-living while photosynthates are living and must pass through living cells that require pressure.arrow_forwardSudents are asked to pair a plant structure to its physiological function and give evidence for why that structure is important for the process they describe Anne: The root hairs are used to pull in sugars available in the soil that give the plant energy for growth and reproduction. Jamil: The phloem is needed for cellular respiration as it transports the carbon dioxide to the leaves in order to perform cellular respiration. Shantal: The cambium is important for phossynthesis because it allows water into the plant which is needed as a reactant for photosynthesis. Enrique The guard cells are needed during transpiration because they open and close to regulate the gases that enter and leave the plant. Which student correctly described a plant structure and its physiological function? O Anne Jamil O Shantal O Enriquearrow_forwardHoware C4 plants and CAM (crassulacean acid metabolism) plants similar?a.They both open their stomata at night.b.They both initially fix carbon into a four carbon molecule.c.They both use more water to fix carbon into an organic compound than C3plants.d.They both have bundle sheath cells.e.Both carbon fixation and PGA production occurs in mesophyll cells.arrow_forward
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