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

Question

Lenticels in the periderm of a woody dicot stem primarily facilitate:

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Plant anatomy and physiology, specifically gas exchange in woody plants.
 **Related Topics**: Periderm formation, secondary growth in dicots, respiration in plants.
 **Prerequisites**: Understanding of plant tissues, their functions, and the process of gas exchange.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the primary function of lenticels in the periderm of a woody dicot stem.
  The options are water transport, food storage, gaseous exchange, and mechanical support.
**Method & Steps**:
 1. Understand the structure and function of lenticels.
  Reasoning: Lenticels are porous structures found in the periderm (bark) of woody stems and roots.  They are composed of loosely arranged cells with large intercellular spaces.
  Formula/Rule: N/A
 2. Consider the functions of the periderm.
  Working: The periderm is the protective outer layer of woody stems and roots, replacing the epidermis during secondary growth.  It protects against water loss, pathogen invasion, and physical damage. However, it is relatively impermeable to gases.
  Key Point: The lenticels are the exception, providing pathways for gas exchange.
 3. Determine the primary function of lenticels.
  Result: Lenticels primarily facilitate gaseous exchange, allowing for the diffusion of oxygen into the stem for respiration and the diffusion of carbon dioxide out.
  Verification: This aligns with the understanding of plant respiration and the need for gas exchange in internal tissues.
 ## OPTION ANALYSIS
A :x: Water transport is primarily facilitated by xylem vessels, not lenticels.
B :x: Food storage is primarily carried out by parenchyma cells in various plant tissues, not lenticels.
C ✓: Gaseous exchange is the primary function of lenticels.
D :x: Mechanical support is provided by the overall structure of the stem, including sclerenchyma cells, not primarily by lenticels.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing lenticels with stomata: Stomata are found on leaves and young stems, while lenticels are found on mature woody stems and roots.
  2.Overlooking the importance of gas exchange in woody stems:  Since the periderm is largely impermeable, the lenticels are crucial for supplying oxygen to internal tissues.
 **Quick Tips**:
  1.Remember that lenticels are like “breathing pores” for woody stems.
  2.Associate lenticels with gas exchange and the periderm's protective role.

D VINOD · Answer

Water transport

D VINOD · Answer

Food storage

D VINOD · Answer

The correct Option is "Gaseous exchange"

D VINOD · Answer

Mechanical support

NEET Botany Anatomy of Flowering Plants Dicot Stem MCQs

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