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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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Root hairs _________.

  1. a. conduct water from cortex to aboveground shoots
  2. b. increase the root's surface area for absorption
  3. c. anchor the plant in soil

Summary Introduction

Concept introduction: Root hair is the hair-like outgrowth of a plant root that absorbs the water and minerals from the soil. The important function of the root hairs is the collection of water and mineral nutrients present in the soil and takes them through the roots to the rest of the body. The root hairs do not have chloroplast as it does not carry out photosynthesis.

Explanation

Reasons for the correct statement:

The root hair is a tubular extension of the epidermis that greatly increases the surface area of the root. They constantly dry off and are replaced by new ones, as the root grows and extends itself into the soil.

Option b. is given as, “increase the roots surface area for absorption.” As the root hairs increase the root surface area for absorption, option b. is correct.

Reasons for the incorrect statements:

Option a...

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