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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Water transport from roots to leaves occurs by a. evaporation, tension, and cohesion b. a pressure gradient inside sieve tubes c. the pumping force of xylem vessels d. different solutes at source and sink regions
What role do cohesion and adhesion play in xylem transport?a. Like transpiration, they create a tension.b. Like root pressure, they create a positive pressure.c. Like sugars, they cause water to enter xylem.d. They create a continuous water column in xylem
Which of the following is/are true?  I. A measure of how much water is present in comparison with the solute molecules in the same volume of solution known as diffusion gradient  II. The region found above the region of cell division can be seen in different young roots because of the presence of numerous root hairs that increase absorption.  III. The meristematic region is has cells that elongate several times their original length and push the root tip through the soil.  IV. The meristematic region is the growing apex of the root
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