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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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Most water moves from soil to vascular cylinder ______.

  1. a. through root hairs
  2. b. between root cells
  3. c. through root cell walls
  4. d. in xylem

Summary Introduction

Introduction:

Water transport from the roots to the vascular system (xylem) takes place via the apoplastic pathway. The apoplastic pathway is one of the two pathway involved in the water, mineral, and solute transport. After absorption to the root hairs, the water and minerals flow in the upright direction to the xylem via the apoplast. The apoplast is a space outside the plasma membrane of the plant cells through which the molecules can freely diffuse without any hindrance.

Explanation

Reason for the correct answer:

The water molecule from the root hairs gets freely diffused and travels in the upright direction to the xylem tube through the apoplast junction present in each plant cell.

Option c. is given as, “through root cell walls”. The root cell wall contains a space called apoplast. Through the apoplast, the water molecules move and reaches the xylem.

Hence, the correct answer is option c.

Reason for the incorrect answers:

Option a. is given as “through root hairs”. Initially, the water is absorbed from the soil through the root hairs present in the root of plants. After that, the water is transported through the root cells...

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