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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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In plants, fibers are a type of _______ cell.

  1. a. parenchyma
  2. b. sclerenchyma
  3. c. collenchyma
  4. d. mesophyll

Summary Introduction

Concept introduction: Parenchyma, collenchyma, and sclerenchyma are the simple tissues with each consisting of one type of cell. Sclerenchyma cells are variably shaped and they will die once they are matured. They have thick cell wall which is made up of polymers like cellulose and lignin. These polymers will provide sturdiness to plant parts and help them resist stretching and compression.

Explanation

Reasons for correct statement:

Fibers and sclereids are made up of sclerenchyma cells. Fibers are long, tapered sclerenchyma cells that occur in bundles and they will support and protect the vascular tissues. These cells die at the stage of maturity and their lignin reinforced walls will remain and support the plant.

Option b. is given as “sclerenchyma”. As the plant fibers are made up of sclerenchyma cells option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “parenchyma”.

Parenchyma is made up of parenchyma cell which has a thin and flexible cell wall...

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