What is Life? A Guide to Biology with Physiology
3rd Edition
ISBN: 9781464157745
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 17, Problem 13SA
Summary Introduction
To review:
How the cohesion-tension mechanism allows vascular plants to transport water without a pump; and how this mechanism affects the maximum height a tree can reach.
Introduction:
Water has three properties that are responsible for the cohesion-tension mechanism – evaporation, cohesion and tension.
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Students have asked these similar questions
Describe the cohesion-tension model of water movement through xylem. Would the weight of water be more of a problem in an upright tree or in a stolon? Why?
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Chapter 17 Solutions
What is Life? A Guide to Biology with Physiology
Ch. 17 - Prob. 1SACh. 17 - Prob. 2SACh. 17 - Prob. 3SACh. 17 - Prob. 4SACh. 17 - Prob. 5SACh. 17 - Prob. 6SACh. 17 - Prob. 7SACh. 17 - Prob. 8SACh. 17 - Prob. 9SACh. 17 - Prob. 10SA
Ch. 17 - Prob. 11SACh. 17 - Prob. 12SACh. 17 - Prob. 13SACh. 17 - Prob. 14SACh. 17 - Prob. 1MCCh. 17 - Prob. 2MCCh. 17 - Prob. 3MCCh. 17 - Prob. 4MCCh. 17 - Prob. 5MCCh. 17 - Prob. 6MCCh. 17 - Prob. 7MCCh. 17 - Prob. 8MCCh. 17 - Prob. 9MCCh. 17 - Prob. 10MCCh. 17 - Prob. 11MCCh. 17 - Prob. 12MCCh. 17 - Prob. 13MCCh. 17 - Prob. 14MC
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- Where does radial water flow of plant happen and what are the THREE (3) pathways?arrow_forwardDiscuss the transport of water from roots to leaves and a particular tropism/nastic movement in Rosa damascenaarrow_forwardWater ascent up a plant is vital for maintaining proper physiological function of the leaves, (a) is root pressure or the cohesion-tension theory MORE important in supplying water to the leaf? (b) explain the difference in the driving force of water ascent between root pressure and cohesion tension.arrow_forward
- When does the effect of root pressure in transport of water is more important?arrow_forwardA Vhet do we call the structures found on the root epidermis that increase the plant's capacity absorb water? d) Briefly explain how the structures you mentioned in c) increase the plant's capacity to absort water. e) Complete the table below: Transport method for water Transport method for (passive / active?) Root Tissue minerals (passive/activ Epidermis: Active Cortex: Active Endodermis: Active Xylem:arrow_forwardConsider the pressure flow model of phloem transport. How do sugars and water enter the phloem from the source? How do sugars and water move from one phloem cell to another?arrow_forward
- What is an adventitious root? In a monocot rhizome such as that of irises and bamboo, are adventitious roots common or rare? If a bamboo rhizome grows 100 feet underground and then sends up an aerial branch, where does that branch get its water—from the roots 100 feet away or from adventitious roots right at its basearrow_forwardWhat does hydraulic conductance mean in the following? The hydraulic limitation hypothesis proposes that reduced growth in taller trees is caused by decreased photosynthesis resulting from a decrease in hydraulic conductance promoted by a longer root-to-leaf flow path.arrow_forwardExplain the difference between symplast and transmembrane water transport pathways in plants. (i) (ii) Explain positive hydrostatic pressure in the root and conditions causing the root pressure. What is the phenomenon likely caused by this root pressure? (iii) Describe the phenomenon observed in Question 1 c) (ii) with inclusion of plant structures involved.arrow_forward
- In a comparison of the water potential and turgor pressure of leaf cells before and after wilting, which of the following would you expect to find? Select one: a. Water potential: wilted = not wilted; Turgor Pressure: wilted < not wilted b. Water potential: wilted > not wilted; Turgor Pressure: wilted < not wilted c. Water potential: wilted < not wilted; Turgor Pressure: wilted > not wilted d. Water potential: wilted < not wilted; Turgor Pressure: wilted < not wilted e. Water potential: wilted > not wilted; Turgor Pressure: wilted > not wiltedarrow_forwardIn xylem, the pressure potential is a negative number. Why? What does the weight of the water have to do with this? Stolons, rhizomes, and horizontal vines do not have a problem with the weight of water. Why? In the epiphytic cactus Rhipsalis, the weight of water actually makes conduction easier. Why?arrow_forwardAmong the three pathways of water movements in plants, which is the most used? Explain the reasons behind. (i) Figure 1: Water droplets on leaf blades (IPM, University of Missouri) Explain the phenomenon shown in Figure 1 by providing the specific term, elucidating the reason, conditions and plant structure involved. (ii)arrow_forward
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