Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 34.2, Problem 3R
Summary Introduction
To review:
The importance of all the three parts of the transpiration-cohesion-tension mechanism in the transfer of water through the xylem.
Introduction:
The water in the xylem of the plants moves primarily by three forces—transpiration, cohesion, and tension. Loss of water from the plant through stomata in form of vapors is known as transpiration. The water in the column of xylem moves because of its cohesion (sticking together of water molecules by hydrogen-bonding) and adhesion (hydrogen-bonding between the water molecules in the sap and the molecules present in the cell walls of xylem) properties.
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Chapter 34 Solutions
Life: The Science of Biology
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- Describe the short-distance transport of water into the xylem. Use the terms root hairs, endodermis, and Casparian strip.arrow_forwardWhen considering the loading and unloading of photosynthate from the phloem, which of the following is FALSE?arrow_forwardDescribe the relationship between transpiration rate and light intensity in basil Ocimum basilicum in terms of photosynthesis, optimal range, and stomata.arrow_forward
- Define the Cohesion-tension model of xylem transport ?arrow_forwardWhat is plant transpiration? What are the two main types of plant transpiration process? Which of them is more significant in volume?arrow_forwardHigh transpiration rates imply bulk flow of water through the xylem which would also be necessary to support distance transport of carbon in the ________ under the theory known as the ________ __________hypothesis. (Fill in the blanks)arrow_forward
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- Why can xylem transport water and minerals using deadcells, whereas phloem requires living cells?arrow_forwardWhich of the following forces make the movement of water through the xylem possible? * A. Cohesion and adhesion B. Transpiration C. Root pressure D. A and B E. A, B, and Carrow_forwardThe location of transpiration occurs at which leaf structure?arrow_forward
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