Biology (MindTap Course List)
Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 35.2, Problem 6LO
Summary Introduction

To compare: Tension-cohesion and root pressure as mechanisms responsible for the rise of water and dissolved minerals in xylem.

Introduction: Water is very important requirement for the growth of plants. Plants have developed an effective way for absorption, translocation, storage, and utilization of water. There is a vascular system in plants that conducts transportation of water in plants. Vascular system comprises two components: xylem and phloem. The transportation of water and dissolved solutes from roots toward leaves is called the ascent of sap.

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Both cohesion-tension and root pressure are mechanisms for moving water in the xylem.  What does it mean when it says that cohesion-tension pulls water, but root pressure pushes water?
Discuss which pathway permits the passage of most solutes and water inside the roots? Which pathway allows the entry of most of the water and some of the solutes inside the root tissue? Explain how the Casparian strip creates a barrier for substance moving through this pathway and how it is circumvented.
A 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:
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