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Biology (MindTap Course List)

11th Edition
Eldra Solomon + 3 others
Publisher: Cengage Learning
ISBN: 9781337392938

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BuyFindarrow_forward

Biology (MindTap Course List)

11th Edition
Eldra Solomon + 3 others
Publisher: Cengage Learning
ISBN: 9781337392938
Chapter 34, Problem 5TYU
Textbook Problem
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Which of the following is not an adaptation of pine needles to conserve water? (a) less surface area exposed to the air than thin-bladed leaves (b) a relatively thick cuticle (c) sunken stomata (d) netted veins instead of parallel veins (e) both c and d are not adaptations of pine needles

Summary Introduction

Introduction: Plants are non-motile living beings that are capable of producing their own food by utilizing the sunlight and carbon dioxide. Leaf is a part of the plant that is thin and flat. The primary function of leaf is photosynthesis. Blade is the broad and flat portion of a leaf. Petiole is the stalk that attaches the blade to the stem.

Explanation of Solution

Reason for the correct answer:

Pine needles have several adaptations in order to prevent water loss. They include:

  • Pine needles have less surface area exposed to the air for transpiration to occur and also the needle is thick rather than thin-bladed leaves in order to reduce water loss.
  • They have a thick, waxy cuticle.
  • The pine needle has sunken stomata that permits for gas exchange but protect the openings from extreme air current that could remove excess air.

The netted veins (the branched in a way that resembles like a net) instead of parallel veins (run parallel to one another) are not an adaptation of pine needles to conserve water.

Option (d) is given as “netted veins instead of parallel veins”.

Pine needles have adaptations like less surface area exposed to the air, thickened cuticle, and sunken stomata to prevent water loss.

Hence, the correct answer is option (d).

Reasons for incorrect answers:

Option (a) is given as, “less surface area exposed to the air than thin-bladed leaves”.

The pine needle has a less surface area exposed to the air for transpiration to occur and also the needle is thick rather than thin-bladed leaves in order to reduce water loss...

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Chapter 34 Solutions

Biology (MindTap Course List)
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Ch. 34.2 - How does blue light trigger stomatal opening?Ch. 34.2 - What physiological changes occur in guard cells...Ch. 34.3 - Discuss transpiration and its effects on plants.Ch. 34.3 - Distinguish between transpiration and guttation.Ch. 34.3 - How is leaf structure related to transpiration?Ch. 34.3 - How do environmental factors (sunlight,...Ch. 34.3 - In what ways is transpiration detrimental to...Ch. 34.3 - How does guttation differ from transpiration?Ch. 34.4 - Define leaf abscission, explain why it occurs, and...Ch. 34.4 - Why do many woody plants living in temperate zones...Ch. 34.4 - What physiological changes occur during leaf...Ch. 34.4 - What is the abscission zone?Ch. 34.5 - List at least four examples of modified leaves and...Ch. 34.5 - What are the primary functions of each of the...Ch. 34.5 - What are the functions of bulbs? of succulent...Ch. 34.5 - What are some of the specialized features of the...Ch. 34 - Test Your Understanding 1. Plants with an...Ch. 34 - Test Your Understanding 2. The primary function of...Ch. 34 - Test Your Understanding 3. Gas exchange occurs...Ch. 34 - Test Your Understanding 4. The thin, noncellular...Ch. 34 - Which of the following is not an adaptation of...Ch. 34 - Test Your Understanding 6. When transpiration is...Ch. 34 - At sunrise, the accumulation in the guard cells of...Ch. 34 - Test Your Understanding 8. Stomatal opening is...Ch. 34 - Test Your Understanding 9. Anatomically, the...Ch. 34 - Modified leaves that enable a stem to climb are...Ch. 34 - There is a trade-off between photosynthesis and...Ch. 34 - Suppose that you are asked to observe a micrograph...Ch. 34 - CONNECT Given that (a) xylem is located toward the...Ch. 34 - VISUALIZE Draw a simple cross section of a leaf....Ch. 34 - What might be some of the advantages of a plant...Ch. 34 - EVOLUTION LINK What is the selective advantage of...Ch. 34 - SCIENCE, TECHNOLOGY, AND SOCIETY Briefly explain...

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