Biology
Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 45, Problem 1MC
Summary Introduction

Introduction:

The development of an embryonic plant in the form of the seedling is called as the germination of a seed. During germination, root grows first and provides water and mineral from the soil to the developing shoots.

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Answer to Problem 1MC

Correct answer:

When a dicot seed sprouts, a root cap protects the emerging root. Therefore, option (d) is correct.

Option (d) is given as “a root cap protects the emerging root”.

Explanation of Solution

Justify reason for the correct statement:

Seeds germinate below the soil, so the delicate part of the embryo that is apical meristem part of an embryo is needed to be protected from the sharp particles of soil during the time of seed germination. Thus, the apical meristem part of the root is protected by the outer covering of root cap.

Hence, option (d) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as “a coleoptile protects the emerging shoot”.

Coleoptile layer is only present in monocot seed, which protects the emerging shoot. Hence, it is a wrong answer.

Option (b) is given as “the shoot develops more rapidly than the root”.

During germination, root develops more rapidly as it provides water and mineral from the soil to the shoot. Hence, it is a wrong answer.

Option (c) is given as “the shoot absorbs nutrients directly from the endosperm”.

The cotyledon part of seed absorbs nutrient from the endosperm. Hence, it is a wrong answer.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

The emerging tip of the root in dicot seed is protected by the root cap.

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