Study Guide for Campbell Biology
Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 36, Problem 6IQ
Summary Introduction

To explain: The mechanism involved in the active transport of sugar into sieve-tube elements or companion cells and represents the side that is present inside the cell.

Introduction: Vascular plants are defined as land plants and it is otherwise referred to as tracheophytes. It forms a large plant group. The land plants have xylem which is lignified tissues that conduct minerals and water to all parts of the plant. The phloem, which is specialized non-lignified tissue, is also present in the vascular plant. The major function of phloem is to conduct the photosynthesis process.

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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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