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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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Which of the following is false?

  1. a. Stems have vascular bundles, and roots have vascular cylinders.
  2. b. Lateral roots can arise from nodes on a mot.
  3. c. Primary growth (lengthening) can occur at an axillary bud.
  4. d. Apical meristem gives rise to epidermal tissue, ground tissue, and vascular tissue.
  5. e. Wood is xylem that forms during secondary growth.

Summary Introduction

Concept introduction: Lateral root helps to anchor the plant securely to the soil. This root contributes to the water uptake and facilitates the extraction of nutrients required for the growth and development of the plant. Different factors are involved in the formation of lateral roots. The lateral root formation is in the control of plant hormones like auxin and by the precise control of aspects by the cell cycle.

Explanation

Reasons for the correct statement:

The lateral roots develop in the pericycle, that is, the outermost cell layer in the vascular cylinder. It extends horizontally from the primary root.

Option b. is given as, “Lateral roots can arise from nodes on a root”. The lateral roots cannot be arise from the nodes on the root. Therefore, option b. is correct.

Reasons for the incorrect answers:

Option a. is given as, “Stems have vascular bundles, and roots have vascular cylinder”.

Since the stems have vascular bundles and roots have vascular cylinder to pump the water and nutrients needed for the plants, the given statement is true. Therefore, option a. is incorrect.

Option c. is given as, “Primary growth (lengthening) can occur at an axillary bud”.

As the primary growth in plants like the increase in the length of the shoot and root can occur at the axillary bud, the given statement is true...

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