Biological Science (7th Edition)
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 36, Problem 2TYK
Summary Introduction

Introduction:

The nutrient concentration is low in the soil surrounding the plant roots. The nutrients are imported into the plants against the concentration gradient by pumping of protons to the extracellular space for transport process to occur.

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a. How do stem being cut underwater affect the speed of absorption of water? b. Why do wilted plants are slow when it comes to absorption of water?
Approximately 10 percent of water within the atmosphere has been released by plants by transpiration. Which is the best method for measuring the transpiration rate within an individual plant? A. Measure osmotic pressure within the guard cells to determine amount of time stomata are open. B. Weigh the plant before and after a 24 hour period while accounting for evaporation from the soil. C. Access the abiotic conditions and how the plant has adapted to its native environment. D. Measure water loss by placing a plastic bag over a stem of the plant and subtracting the amount of water released into the bag from the amount of water within the soil.
Compare the energy needs of a plant for the movement of water in the xylem according to the cohesion-tension model to the movement of phloem sap according to the pressure-flow model?
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