Q.118 Botany ⭐ 360° Option Elimination Active

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NEET 2025 Botany Question 118 Solution

Topic: Anatomy of Flowering Plants · Official NTA Booklet Code 45

Question

Find the statement that is NOT correct with regard to the structure of monocot stem.

(1)Hypodermis is parenchymatous.
(2)Vascular bundles are scattered.
(3)Vascular bundles are conjoint and closed.
(4)Phloem parenchyma is absent.

✓

Verified Against NTA Final Answer Key

Option (1) : Hypodermis is parenchymatous.

📚 Anatomy of Flowering Plants Easy

📋 Given Parameters & Problem Setup

Plant Organ Monocotyledonous stem (e.g., Zea mays / maize stem)

Target Statement Statement that is NOT correct (False statement)

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The 30-Second Exam Hall Shortcut: ⚡ Monocot vs Dicot Stem Hypodermis Fingerprint

⏱️ Save ~25 seconds

Dicot Stem = Collenchymatous hypodermis! Monocot Stem = SCLERENCHYMATOUS hypodermis! Statement (1) claiming parenchymatous hypodermis is completely WRONG!

1 Check each statement against NCERT monocot stem anatomy:

2 Hypodermis is parenchymatous -> FALSE! NCERT verbatim: "The monocotyledonous stem has a sclerenchymatous hypodermis..."

3 Vascular bundles are scattered -> TRUE! Numerous vascular bundles scattered in ground tissue.

4 Vascular bundles are conjoint and closed -> TRUE! Xylem and phloem on same radius, cambium absent (closed).

5 Phloem parenchyma is absent -> TRUE! Monocot vascular bundles lack phloem parenchyma and have water-containing cavities.

6 Statement (1) is NOT correct!

7 Select Option (1)!

🛡️

Why You Can 100% Trust This Shortcut: Dicot vs Monocot Stomatal & Trichome Anatomy (NCERT Biology · Anatomy of Flowering Plants).

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Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Diagnostic Features of Monocotyledonous Stem Anatomy

Transverse section of a typical monocot stem (e.g., maize, grass) reveals the following distinct anatomical features:

• Epidermis: Single outermost layer with cuticle; trichomes (epidermal hairs) are generally absent.
• Hypodermis: A few layers of thick-walled, lignified sclerenchymatous cells providing mechanical strength to withstand bending and wind stress. It is NEVER parenchymatous or collenchymatous.
• Ground tissue: Large, conspicuous parenchymatous tissue extending from hypodermis to the center without differentiation into cortex, endodermis, pericycle, and pith.

Step 2

Vascular Architecture in Monocot Stem

Vascular bundles display iconic diagnostic hallmarks:

• Scattered distribution: A large number of vascular bundles are scattered throughout the ground tissue; peripheral bundles are smaller and more densely arranged than larger central ones.
• Bundle sheath: Each vascular bundle is enveloped by a sclerenchymatous bundle sheath.
• Conjoint and closed: Vascular bundles are conjoint (xylem and phloem on same radius), collateral, and closed (cambium is absent, precluding secondary growth).
• Phloem composition: Composed of sieve tubes and companion cells; phloem parenchyma is absent.
• Water cavity: A lysigenous cavity (water-containing cavity) is formed by the breakdown of inner protoxylem vessels.

Step 3

Evaluation of the Options

Statement (1) claims "Hypodermis is parenchymatous", directly contradicting the presence of a sclerenchymatous hypodermis. Hence, Statement (1) is incorrect.

\text{Monocot Hypodermis} = \text{Sclerenchymatous} \neq \text{Parenchymatous}

⭐

360° Option Elimination Engine Key Feature

Diagnose every choice: Know exactly why the right option works and why distractors fail.

4-Option Deep Scan

1 A

✓ 100% Correct

Verdict & Scientific Reason:

100% correct choice (as the incorrect statement). Monocot stem hypodermis is composed of sclerenchyma, providing mechanical rigidity.

💡

Why this is airtight: None; knows that hypodermis in monocot stem is sclerenchyma.

2 B

✗ Incorrect

Verdict & Scientific Reason:

Incorrect choice (true statement). Monocot vascular bundles are characteristically scattered throughout parenchymatous ground tissue (atactostele).

⚠️

Student Fallacy (Why candidates pick this trap): Mistaking a correct biological fact as the false statement.

3 C

✗ Incorrect

Verdict & Scientific Reason:

Incorrect choice (true statement). Cambium is absent, making them closed.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing open dicot bundles with closed monocot bundles.

4 D

✗ Incorrect

Verdict & Scientific Reason:

Incorrect choice (true statement). Absence of phloem parenchyma is a textbook hallmark of monocots.

⚠️

Student Fallacy (Why candidates pick this trap): Forgetting that monocots generally lack phloem parenchyma.

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NTA Trap Alert: Dicot vs Monocot Stem Hypodermis Tissue Type

Students frequently confuse hypodermal tissues: Dicot stem hypodermis is COLLENCHYMATOUS (flexible mechanical support). Monocot stem hypodermis is SCLERENCHYMATOUS (rigid mechanical support). Parenchyma forms the ground tissue, NOT the hypodermis!

🛡️ How to avoid the -1 mark: Dicot = Collenchyma; Monocot = Sclerenchyma; Neither has parenchymatous hypodermis!

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Core NEET Syllabus Standard

NEET Biology Core Syllabus · Anatomy of Flowering Plants Standard Benchmark

Core Scientific Principle Tested:

"Monocot stem possesses a sclerenchymatous hypodermis, scattered conjoint closed vascular bundles, and lacks phloem parenchyma."

Syllabus Focus: Monocotyledonous Stem

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

Mo-Scle: Monocot = Sclerenchymatous hypodermis; Di-Col: Dicot = Collenchymatous!

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NEET 2025 Botany Question 118 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Monocot vs Dicot Stem Hypodermis Fingerprint

Step-by-Step Rigorous Workflow & Mathematical Proof

Diagnostic Features of Monocotyledonous Stem Anatomy

Vascular Architecture in Monocot Stem

Evaluation of the Options

360° Option Elimination Engine Key Feature

NTA Trap Alert: Dicot vs Monocot Stem Hypodermis Tissue Type

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

🔗 Related Questions — Anatomy of Flowering Plants

Stomatal Apparatus and Guard Cell Architecture

Collenchyma Living Nature and Gymnosperm Xylem Composition

Bulliform Cells and Inward Leaf Rolling in Monocots

Endarch vs. Exarch Primary Xylem Arrangement

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