The Question is from neet-botany anatomy-of-flowering-plants dicot-leaf, and it was created by the author K SURESH KUMAR

Question

Which tissue is responsible for the majority of photosynthesis in a dicot leaf?

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Plant Anatomy and Photosynthesis
 **Related Topics**: Leaf structure, mesophyll cells, chloroplasts
 **Prerequisites**: Understanding of the basic structure of a dicot leaf and the role of chloroplasts in photosynthesis.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the primary tissue responsible for photosynthesis in a dicot leaf.
  We need to consider the different tissues present in a leaf and their functions.
**Method & Steps**:
 1. Identify the tissues present in a dicot leaf: epidermis, palisade mesophyll, spongy mesophyll, and vascular bundles.
  Reasoning: Dicot leaves have a distinct arrangement of tissues optimized for photosynthesis and gas exchange.
  Formula/Rule: None directly applicable.
 2. Determine the function of each tissue:
  Epidermis: Protection; Spongy mesophyll: Gas exchange; Vascular bundles: Transport; Palisade mesophyll: Photosynthesis (main).
  Working: The palisade mesophyll is located beneath the upper epidermis and is densely packed with chloroplasts, the organelles responsible for photosynthesis.
  Key Point:  Chloroplast concentration is crucial for efficient light capture and photosynthetic activity.
 3. Conclude which tissue is primarily responsible for photosynthesis.
  Result: Palisade mesophyll is responsible for the majority of photosynthesis in a dicot leaf.
  Verification: The arrangement of the palisade mesophyll, with its high chloroplast density and location for optimal light absorption, supports this conclusion.
 ## OPTION ANALYSIS
A :x: Spongy mesophyll primarily facilitates gas exchange, not photosynthesis, although some photosynthesis may occur.
B :x: The epidermis is a protective outer layer, lacking the chloroplasts necessary for photosynthesis.
C :x: Vascular bundles transport water and nutrients but are not involved directly in photosynthesis.
D ✓: Palisade mesophyll cells contain a high concentration of chloroplasts, making them the primary site of photosynthesis in dicot leaves.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the roles of spongy and palisade mesophyll: Remember that palisade mesophyll is the primary photosynthetic tissue due to its high chloroplast concentration.
  2.Overlooking the importance of chloroplast location: The position of the palisade mesophyll, directly beneath the upper epidermis, maximizes light absorption.
 **Quick Tips**:
  1.Visualize a cross-section of a dicot leaf to easily recall the location and arrangement of tissues.
  2.Remember the key function of each tissue: epidermis (protection), mesophyll (photosynthesis and gas exchange), vascular bundles (transport).

K SURESH KUMAR · Answer

Spongy mesophyll

K SURESH KUMAR · Answer

Epidermis

K SURESH KUMAR · Answer

Vascular bundles

K SURESH KUMAR · Answer

The correct Option is "Palisade mesophyll"

NEET Botany Anatomy of Flowering Plants Dicot Leaf MCQs

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