The Question is from neet-botany anatomy-of-flowering-plants dicot-stem, and it was created by the author NISHANTH

Question

Which of the following characteristics distinguishes the periderm from the epidermis in a woody dicot stem?

NISHANTH · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Plant anatomy, specifically the differences between epidermis and periderm in woody dicots.
 **Related Topics**: Secondary growth, cork cambium, protective tissues, suberin.
 **Prerequisites**: Understanding of plant tissue systems and the process of secondary growth in woody plants.
## SOLUTION PATHWAY
**Given Information**:
  The question asks for the characteristic that differentiates the periderm from the epidermis in a woody dicot stem.
  Options: Presence of stomata, single-layered structure, presence of suberized cells, origin from the ground meristem.
**Method & Steps**:
 1. Analyze the characteristics of the epidermis and periderm.
  Reasoning: The epidermis is the outermost layer of cells in a young plant stem.  The periderm replaces the epidermis during secondary growth in woody dicots.
 2. Compare the options with the characteristics of the epidermis and periderm.
  Working: 
            * Epidermis: Typically single-layered, contains stomata (in stems), composed of non-suberized cells, originates from the protoderm.
            * Periderm: Multi-layered, lacks stomata (mostly), composed of suberized cells (cork cells), originates from the cork cambium (phellogen), a secondary meristem.
 3. Identify the distinguishing characteristic.
  Result: The presence of suberized cells is the key difference. Periderm is characterized by the presence of suberin in its cells, a waterproofing substance, which is absent in the epidermis.
  Verification: The other options are incorrect because the epidermis can have stomata, is single-layered, and does not originate from the ground meristem. The periderm is not single-layered and does not originate from the ground meristem.
 ## OPTION ANALYSIS
A :x: Presence of stomata is not a distinguishing feature, as some epidermal cells have stomata, while the periderm generally does not (though lenticels allow gas exchange).
B :x: Epidermis is single-layered, while periderm is multi-layered.
C ✓: Presence of suberized cells is the defining characteristic of the periderm. Suberin provides waterproofing and protection.
D :x: Epidermis originates from the protoderm, while the periderm originates from the cork cambium (phellogen).
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the epidermis with the periderm: Remembering that the periderm replaces the epidermis in woody stems during secondary growth is crucial.
  2.Overlooking the role of suberin: Understanding the importance of suberin in providing protection and waterproofing to the periderm is key.
 **Quick Tips**:
  1.Remember that periderm is a secondary tissue formed during secondary growth, replacing the epidermis.
  2.Associate suberin with the periderm, as it is a defining component of cork cells.

NISHANTH · Answer

Presence of stomata

NISHANTH · Answer

Single-layered structure

NISHANTH · Answer

The correct Option is "Presence of suberized cells"

NISHANTH · Answer

Origin from the ground meristem

NEET Botany Anatomy of Flowering Plants Dicot Stem MCQs

Select Topic

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

NEET Subjects

Our Bots

Company