BIOLOGY >PRINT UPGRADE<
BIOLOGY >PRINT UPGRADE<
11th Edition
ISBN: 9780357091586
Author: Solomon
Publisher: CENGAGE L
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Chapter 36.1, Problem 5LO
Summary Introduction

To describe: Three roots that are modified to perform uncommon functions.

Introduction: The underground branching root systems are often more extensive than aerial part of plant. The extension of root depth and spread of a plant differ for another plant species and it also varies among individuals of same species. For the survival of plant, firm anchorage is essential so that the stem remains upright that enable leaves to absorb sunlight efficiently. The roots absorb water and dissolved minerals. The dissolved minerals are transported from roots to the leaves throughout the plant in the xylem.

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You aim to test the hypothesis that the Tbx4 and Tbx5 genes inhibit each other's expression during limb development. With access to chicken embryos and viruses capable of overexpressing Tbx4 and Tbx5, describe an experiment to investigate whether these genes suppress each other's expression in the limb buds. What results would you expect if they do repress each other? What results would you expect if they do not repress each other?
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