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BiologyBiology: The Unity and Diversity of Life (MindTap Course List)15th Edition

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Chapter 28, Problem 11SQ
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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

Solutions

Chapter
Section
Problem 1DAA
Problem 2DAA
Problem 3DAA
Problem 4DAA
Problem 1SQ
Problem 2SQ
Problem 3SQ
Problem 4SQ
Problem 5SQ
Problem 6SQ
Problem 7SQ
Problem 8SQ
Problem 9SQ
Problem 10SQ
Problem 11SQ
Problem 12SQ
Problem 13SQ
Problem 14SQ
Problem 15SQ
Problem 1CT
Problem 2CT
Problem 3CT
Problem 4CT
Problem 5CT
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
1 views

With stomata closed, a waterproof cuticle ______.

  1. a. minimizes water loss through plant surfaces
  2. b. permits gas exchange between the plant and the air
  3. c. both a and b

Summary Introduction

Introduction: Transpiration is a process by which water molecules escape from the leaves. Guard cells are the cells that are present above and below surfaces of leaves. Guard cell contains a small opening structure called as stomata through which the molecules escape. Excess water stored in the cells is allowed to escape through the stomata in the leaves. It controls the transfer of gaseous and water molecules during the transpiration. Stomata contain a protective layer over it called as cuticle. Cutin is a waxy and water-repellant substance present over the protective layer of leaf epidermis in plants.

Explanation

Reason for correct answer:

Cuticle is a protective layer made of wax-like substance called as cutin over the plant surfaces to prevent the water loss from the leaves. Cuticle can reduce the water loss only when the stomata are closed. When there will be a swelling in the guard cells, the stomata opens and water molecules escape through it. At that time, cuticle cannot prevent the water loss.

Option a. is given as “minimizes water loss through plant surfaces”. Waterproof cuticle made up of waxy cutin is able to prevent the water loss only at the time of stomata closure.

Hence, the correct answer is option a.

Reasons for incorrect statements:

Option b...

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Chapter 28 Solutions

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Ch-28 P-1DAACh-28 P-2DAACh-28 P-3DAACh-28 P-4DAACh-28 P-1SQCh-28 P-2SQCh-28 P-3SQCh-28 P-4SQCh-28 P-5SQCh-28 P-6SQ
Ch-28 P-7SQCh-28 P-8SQCh-28 P-9SQCh-28 P-10SQCh-28 P-11SQCh-28 P-12SQCh-28 P-13SQCh-28 P-14SQCh-28 P-15SQCh-28 P-1CTCh-28 P-2CTCh-28 P-3CTCh-28 P-4CTCh-28 P-5CT

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