Textbook Question
On this cross section from a woody eudicot, label a growth ring, late wood, early wood, and a vessel element. Then draw an arrow in the pith-to-cork direction.
Ch. 35 - Vascular Plant Structure, Growth, and Development
Urry11th EditionCampbell BiologyISBN: 9789357423311
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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 Cycle10
- Ch. 13 - Meiosis and Sexual Life Cycles10
- Ch. 14 - Mendel and the Gene Idea14
- Ch, 15 - The Chromosomal Basis of Inheritance7
- 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 Biotechnology8
- 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 Earth6
- Ch. 26 - Phylogeny and the Tree of Life7
- Ch. 27 - Bacteria and Archaea8
- Ch. 28 - Protists7
- Ch. 29 - Plant Diversity I: How Plants Colonized Land7
- Ch. 30 - Plant Diversity II: The Evolution of Seed Plants7
- 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 Development8
- Ch. 36 - Resource Acquisition and Transport in Vascular Plants8
- Ch. 37 - Soil and Plant Nutrition10
- 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 System6
- Ch. 44 - Osmoregulation and Excretion6
- Ch. 45 - Hormones and the Endocrine System8
- Ch. 46 - Animal Reproduction8
- 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 Ecology10
- Ch. 54 - Community Ecology9
- Ch. 55 - Ecosystems and Restoration Ecology8
- Ch. 56 - Conservation Biology and Global Change6
Chapter 35, Problem 7
Which of the following would not be seen in a cross section through the woody part of a root?
a. Sclerenchyma cells
b. Parenchyma cells
c. Sieve-tube elements
d. Root hairs
Verified step by step guidance1
Understand the structure of a woody root: Woody roots are primarily composed of secondary xylem and secondary phloem, which are produced by the vascular cambium.
Identify the types of cells typically found in woody roots: Woody roots contain sclerenchyma cells, parenchyma cells, and various elements of the vascular system such as xylem and phloem cells.
Recognize the function and location of sieve-tube elements: Sieve-tube elements are part of the phloem tissue, responsible for transporting nutrients throughout the plant. They are typically found in the vascular system.
Consider the role and location of root hairs: Root hairs are extensions of epidermal cells that increase surface area for absorption. They are found on the outer surface of roots, not within the woody part.
Determine which option is not typically found in a cross section of the woody part of a root: Since root hairs are located on the outer surface and not within the woody part, they would not be seen in a cross section through the woody part of a root.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Woody Root Structure
The woody part of a root primarily consists of xylem and phloem tissues, which are responsible for water and nutrient transport. Xylem includes vessels and tracheids, while phloem contains sieve-tube elements and companion cells. Understanding the composition of these tissues is crucial for identifying what structures are present in a cross-section of a woody root.
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07:55
Root System
Sclerenchyma Cells
Sclerenchyma cells are a type of plant cell known for their thick, lignified walls, providing structural support to the plant. They are commonly found in various parts of the plant, including stems and roots, often associated with vascular tissues. Their presence in woody roots is typical due to their supportive role.
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04:03Ground Tissue Cells
Root Hairs
Root hairs are extensions of root epidermal cells that increase the surface area for water and nutrient absorption. They are typically found in the root's non-woody parts, particularly in the region of maturation. In a cross-section of a woody root, root hairs are absent as they are part of the outermost layer, not the internal woody structure.
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07:55Root System
Related Practice
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
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
Textbook Question
Which of the following arise(s), directly or indirectly, from meristematic activity?
a. Secondary xylem
b. Leaves
c. Dermal tissue
d. All of the above
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