Textbook Question
The innermost layer of the root cortex is the
a. Core
b. Pericycle
c. Endodermis
d. Pith
Ch. 35 - Vascular Plant Structure, Growth, and Development
Urry12th EditionCampbell BiologyISBN: 9785794169850
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Table of contents
- Ch. 1 - Evolution, the Themes of Biology, and Scientific Inquiry8
- Ch. 2 - The Chemical Context of Life8
- Ch. 3 - Water and Life6
- Ch. 4 - Carbon and the Molecular Diversity of Life9
- Ch. 5 - The Structure and Function of Large Biological Molecules9
- Ch. 6 - A Tour of the Cell6
- Ch. 7 - Membrane Structure and Function6
- Ch. 8 - An Introduction to Metabolism6
- Ch. 9 - Cellular Respiration and Fermentation10
- Ch. 10 - Photosynthesis7
- Ch. 11 - Cell Communication7
- Ch. 12 - The Cell Cycle11
- Ch. 13 - Meiosis and Sexual Life Cycles10
- Ch. 14 - Mendel and the Gene Idea14
- Ch, 15 - The Chromosomal Basis of Inheritance6
- Ch. 16 - The Molecular Basis of Inheritance9
- Ch. 17 - Gene Expression: From Gene to Protein9
- Ch. 18 - Regulation of Gene Expression10
- Ch. 19 - Viruses6
- Ch. 20 - DNA Tools and Biotechnology7
- Ch. 21 - Genomes and Their Evolution8
- Ch. 22 - Descent with Modification: A Darwininan View of Life6
- Ch. 23 - The Evolution of Populations5
- Ch. 24 - The Origin of Species6
- Ch. 25 - The History of Life on Earth8
- Ch. 26 - Phylogeny and the Tree of Life8
- Ch. 27 - Bacteria and Archaea6
- Ch. 28 - Protists7
- Ch. 29 - Plant Diversity I: How Plants Colonized Land7
- Ch. 30 - Plant Diversity II: The Evolution of Seed Plants6
- Ch. 31 - Fungi5
- Ch. 32 - An Overview of Animal Diversity4
- Ch. 33 - An introduction to Invertebrates6
- Ch. 34 - The Origin and Evolution of Vertebrates7
- Ch. 35 - Vascular Plant Structure, Growth, and Development10
- Ch. 36 - Resource Acquisition and Transport in Vascular Plants8
- Ch. 37 - Soil and Plant Nutrition11
- Ch. 38 - Angiosperm Reproduction and Biotechnology8
- Ch. 39 - Plant Responses to Internal and External Signals8
- Ch. 40 - Basic Principles of Animal Form and Function8
- Ch. 41 - Animal Nutrition7
- Ch. 42 - Circulation and Gas Exchange7
- Ch. 43 - The Immune System5
- Ch. 44 - Osmoregulation and Excretion6
- Ch. 45 - Hormones and the Endocrine System8
- Ch. 46 - Animal Reproduction9
- Ch. 47 - Animal Development8
- Ch. 48 - Neurons, Synapses, and Signaling6
- Ch. 49 - Nervous Systems8
- Ch. 50 - Sensory and Motor Mechanisms5
- Ch. 51 Animal Behavior6
- Ch. 52 - An Introduction to Ecology and the Biosphere7
- Ch. 53 - Population Ecology9
- Ch. 54 - Community Ecology9
- Ch. 55 - Ecosystems and Restoration Ecology8
- Ch. 56 - Conservation Biology and Global Change6
Chapter 35, Problem 5
The vascular cambium gives rise to
a. All xylem
b. All phloem
c. Primary xylem and phloem
d. Secondary xylem and phloem
Verified step by step guidance1
Understand the role of the vascular cambium: The vascular cambium is a type of lateral meristem in plants responsible for the production of secondary growth, which increases the thickness of stems and roots.
Differentiate between primary and secondary growth: Primary growth occurs at the apical meristems and results in the elongation of the plant, while secondary growth, facilitated by the vascular cambium, results in the thickening of the plant.
Identify the products of the vascular cambium: The vascular cambium produces secondary xylem (wood) and secondary phloem, contributing to the plant's increased girth.
Clarify the distinction between primary and secondary tissues: Primary xylem and phloem are produced by the apical meristems during primary growth, whereas secondary xylem and phloem are produced by the vascular cambium during secondary growth.
Conclude which option is correct: Based on the understanding that the vascular cambium produces secondary xylem and phloem, identify the correct answer from the given options.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Vascular Cambium
The vascular cambium is a type of lateral meristem in plants responsible for the production of secondary vascular tissues. It is a cylindrical layer of cells that divides to produce secondary xylem (wood) on the inside and secondary phloem on the outside, contributing to the thickening of stems and roots in woody plants.
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Secondary Growth
Secondary growth refers to the increase in thickness or girth of plant stems and roots, primarily in woody plants. This growth is facilitated by the vascular cambium and cork cambium, which produce secondary xylem and phloem, and cork, respectively. Secondary growth is crucial for the structural support and transport of nutrients and water in mature plants.
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Primary vs. Secondary Xylem and Phloem
Primary xylem and phloem are formed during the initial growth phase from the apical meristems, contributing to the elongation of the plant. In contrast, secondary xylem and phloem are produced by the vascular cambium during secondary growth, increasing the plant's thickness. Understanding the distinction is essential for identifying the roles of different plant tissues in growth and nutrient transport.
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Related Practice
Textbook Question
Heartwood and sapwood consist of
a. Bark
b. Periderm
c. Secondary xylem
d. Secondary phloem
Textbook Question
The phase change of an apical meristem from the juvenile to the mature vegetative phase is often revealed by
a. A change in the morphology of the leaves produced
b. The initiation of secondary growth
c. The formation of lateral roots
d. The activation of floral meristem identity genes
Textbook Question
The root pericycle is the site where
a. Secondary growth originates.
b. Root hairs originate.
c. Lateral roots originate.
d. The endodermis originates.
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Textbook Question
Root apical meristems are found
a. Only in taproots.
b. Only in lateral roots.
c. Only in adventitious roots.
d. In all roots.
Textbook Question
Suppose a flower had normal expression of genes A and C and expression of gene B in all four whorls. Based on the ABC hypothesis, what would be the structure of that flower, starting at the outermost whorl?
a. Carpel-petal-petal-carpel
b. Petal-petal-stamen-stamen
c. Sepal-carpel-carpel-sepal
d. Sepal-sepal-carpel-carpel