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 3
Heartwood and sapwood consist of
a. Bark
b. Periderm
c. Secondary xylem
d. Secondary phloem
Verified step by step guidance1
Understand the structure of a tree: Trees have several layers including bark, periderm, xylem, and phloem. Each layer has a specific function and composition.
Identify the role of xylem: Xylem is responsible for transporting water and nutrients from the roots to the rest of the tree. It is divided into heartwood and sapwood.
Differentiate between heartwood and sapwood: Heartwood is the central, non-living part of the tree, providing structural support. Sapwood is the outer, living part of the xylem, actively involved in transport.
Recognize the composition of heartwood and sapwood: Both heartwood and sapwood are composed of secondary xylem, which is formed during the secondary growth of the tree.
Conclude that heartwood and sapwood consist of secondary xylem, which is option c.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Heartwood and Sapwood
Heartwood and sapwood are parts of a tree's secondary xylem. Heartwood is the central, non-living part that provides structural support, while sapwood is the outer, living part that transports water and nutrients. Understanding their roles helps in identifying the correct answer related to tree anatomy.
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06:53
Secondary Growth
Secondary Xylem
Secondary xylem is the tissue responsible for water conduction and structural support in woody plants. It forms through the process of secondary growth, which increases the girth of stems and roots. Heartwood and sapwood are both components of secondary xylem, crucial for understanding their function in trees.
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Guided course
06:53Secondary Growth
Tree Anatomy
Tree anatomy includes various layers such as bark, periderm, secondary xylem, and secondary phloem. Each layer has distinct functions, with secondary xylem being vital for water transport and support. Recognizing these layers helps in distinguishing between heartwood and sapwood and their respective roles.
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04:35Building Phylogenetic Trees Example 1
Related Practice
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
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 vascular cambium gives rise to
a. All xylem
b. All phloem
c. Primary xylem and phloem
d. Secondary xylem and phloem
Textbook Question
Most of the growth of a plant body is the result of
a. Cell differentiation
b. Morphogenesis
c. Cell division
d. Cell elongation