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

Question

Which of the following features distinguishes a monocot vascular bundle from a dicot vascular bundle in the stem?

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Anatomy of Monocot and Dicot Stems
 **Related Topics**: Vascular bundles, sclerenchyma, cambium, pericycle
 **Prerequisites**: Basic understanding of plant tissue types and their arrangement in stems.
## SOLUTION PATHWAY
**Given Information**:
  The question asks for the distinguishing feature between monocot and dicot vascular bundles in the stem.
  Options describe different characteristics of vascular bundles.
**Method & Steps**:
 1. Compare the structural characteristics of monocot and dicot vascular bundles.
  Reasoning: Monocots and dicots differ significantly in their stem vascular bundle arrangement and composition.  Dicots have a ring of vascular bundles with a central pith and interfascicular cambium, allowing for secondary growth. Monocots have scattered vascular bundles without a ring arrangement and lack a well-defined cambium.
 2. Analyze each option to determine which accurately reflects this difference.
  Working: Option B correctly identifies the presence of a sclerenchymatous bundle sheath and the absence of cambium in monocots as a key distinguishing feature.  Monocots possess a sclerenchymatous sheath surrounding their vascular bundles for mechanical support. The absence of cambium prevents secondary growth in monocots. The other options describe features of dicots or are incorrect for both monocots and dicots.
 3. Select the option that best describes the distinguishing characteristic.
  Result: Option B
  Verification: Cross-referencing with plant anatomy textbooks and diagrams confirms that the presence of a sclerenchymatous bundle sheath and the absence of cambium are defining features of monocot vascular bundles in stems.
 ## OPTION ANALYSIS
A :x:  This describes the dicot stem structure.
B ✓: This accurately describes the monocot stem vascular bundle structure.
C :x: This describes the dicot stem structure, specifically the presence of a continuous vascular cylinder.
D :x: While monocots have conjoint and open vascular bundles, the prominent pericycle is not a unique distinguishing feature from dicots.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the arrangement of vascular bundles in monocots and dicots: Remember that monocots have scattered bundles, while dicots have a ring arrangement.
  2.Overlooking the role of cambium: The absence of cambium in monocots is crucial for understanding their inability to undergo secondary growth.
 **Quick Tips**:
  1.Visualize the cross-sections of monocot and dicot stems to remember the key differences in vascular bundle arrangement.
  2.Use mnemonics to remember the characteristics, such as 'Monocots: Scattered, Sclerenchyma, No Cambium'.

K SURESH KUMAR · Answer

Presence of a well-developed pith and a ring of vascular bundles

K SURESH KUMAR · Answer

The correct Option is "Presence of a sclerenchymatous bundle sheath and absence of cambium"

K SURESH KUMAR · Answer

Presence of a continuous vascular cylinder and presence of cambium

K SURESH KUMAR · Answer

Presence of conjoint and open vascular bundles with a prominent pericycle

NEET Botany Anatomy of Flowering Plants Monocot Stem MCQs

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