Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 35.5, Problem 3CC
Summary Introduction
To explain: “Tepals” on the basis of ABC hypothesis.
Concept introduction: In plants, transition from vegetative to reproductive phase is marked by production of flowers. Flowering is induced by day length and certain chemicals called hormones. “Floral meristem identity genes” play an important role in flowering.
The development of floral pattern is regulated by various organ identity genes. These genes belong to the MADS-box family. These genes encode transcription factors that regulate the expression of other genes and thereby produce a peculiar floral pattern. The floral pattern consists of four whorls that appears as concentric circles when viewed from the top.
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In some species, sepals look like petals, and both are collectively called “tepals.” Suggest an extension to the ABC hypothesis that could account for tepals.
. MAKE CONNECTIONS What type of feedback processis exemplified by the production of ethylene during fruitripening? Explain. (See Figure 1.10.)
Suppose a flower had normal expression of genes A and Cand expression of gene B in all four whorls. Based on the ABChypothesis, what would be the structure of that flower, startingat the outermost whorl?(A) carpel-petal-petal-carpel(B) petal-petal-stamen-stamen(C) sepal-carpel-carpel-sepal(D) sepal-sepal-carpel-carpel
Chapter 35 Solutions
Campbell Biology
Ch. 35.1 - Prob. 1CCCh. 35.1 - WHAT IF? If humans were photoautotrophs, making...Ch. 35.1 - Prob. 3CCCh. 35.2 - Prob. 1CCCh. 35.2 - Prob. 2CCCh. 35.2 - Prob. 3CCCh. 35.3 - Prob. 1CCCh. 35.3 - Prob. 2CCCh. 35.3 - Prob. 3CCCh. 35.4 - A sign is hammered into a tree 2 m from the tree's...
Ch. 35.4 - Prob. 2CCCh. 35.4 - Would you expect a tropical tree to have distinct...Ch. 35.4 - Prob. 4CCCh. 35.5 - How can two cells in a plant have vastly different...Ch. 35.5 - Prob. 2CCCh. 35.5 - Prob. 3CCCh. 35 - Prob. 35.1CRCh. 35 - Prob. 35.2CRCh. 35 - Prob. 35.3CRCh. 35 - Whht advantages did plants gain from the evolution...Ch. 35 - Prob. 35.5CRCh. 35 - Most of the growth of a plant body is the result...Ch. 35 - Prob. 2TYUCh. 35 - Prob. 3TYUCh. 35 - The phase change of an apical meristem from the...Ch. 35 - Prob. 5TYUCh. 35 - Prob. 6TYUCh. 35 - Prob. 7TYUCh. 35 - Supposc a flower had normal expression of genes A...Ch. 35 - Prob. 9TYUCh. 35 - Which of the following would not be seen in a...Ch. 35 - Prob. 11TYUCh. 35 - Prob. 12TYUCh. 35 - Prob. 13TYUCh. 35 - EVOLUTION CONNECTION Evolutionary biologists have...Ch. 35 - SCIENTIFIC INQUIRY Grasslands typically do not...Ch. 35 - SCIENCE, TECHNOLOGY, AND SOCIETY Hunger and...Ch. 35 - WRITE ABOUT A THEME: ORGANIZATION In a short essay...Ch. 35 - SYNTHESIZE YOUR KNOWLEDGE This stained light...
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