Q.111 Botany ⭐ 360° Option Elimination Active

NEET 2023 Botany Question 111 Solution

Topic: Morphology of Flowering Plants · Official NTA Booklet Code G5

Question

Family Fabaceae differs from Solanaceae and Liliaceae. With respect to the stamens, pick out the characteristics specific to family Fabaceae but not found in Solanaceae or Liliaceae.

(1)Epiphyllous and Dithecous anthers
(2)Diadelphous and Dithecous anthers
(3)Polyadelphous and epipetalous stamens
(4)Monoadelphous and Monothecous anthers

✓

Verified Against NTA Final Answer Key

Option (2) : Diadelphous and Dithecous anthers

📚 Morphology of Flowering Plants Easy

📋 Given Parameters & Problem Setup

Target Family Fabaceae (Papilionoideae / Legume family)

Comparison Families Solanaceae (Potato family) and Liliaceae (Lily family)

Organ Androecium (stamens)

⚡

The 30-Second Exam Hall Shortcut: ⚡ Fabaceae Androecium Formula: 9 + 1 Diadelphous

⏱️ Save ~25 seconds

The classic hallmark of Fabaceae androecium is ten stamens arranged in two bundles: 9 fused into a sheath and 1 free, i.e., diadelphous condition $A_{(9)+1}$ with dithecous anthers!

1 Fabaceae androecium: Stamens ten, diadelphous

A_{(9)+1}

, anther dithecous.

2 Solanaceae androecium: Stamens five, epipetalous, free, dithecous.

3 Liliaceae androecium: Stamens six,

3+3

, epiphyllous, dithecous.

4 Only Fabaceae possesses the diadelphous condition.

5 Match Option (2) Diadelphous and Dithecous anthers.

🛡️

Why You Can 100% Trust This Shortcut: Canonical NCERT Angiosperm family floral formulas and morphological diagnostics.

📐

Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Comparative Androecium Morphology Across Families

Analyzing the androecium of the three canonical NCERT angiosperm families:

\begin{aligned} \text{\textbf{Fabaceae:}} & \quad \text{Stamens ten, } \mathbf{\text{diadelphous } (9)+1}, \text{ anther } \mathbf{\text{dithecous}} \\[4pt] \text{Solanaceae:} & \quad \text{Stamens five, epipetalous } (\overparen{C\ A}_5), \text{ polyandrous, anther dithecous} \\[4pt] \text{Liliaceae:} & \quad \text{Stamens six, epiphyllous } (\overparen{P\ A}_{3+3}), \text{ anther dithecous} \end{aligned}

Step 2

Elimination of Non-Fabaceae Features

Epiphyllous stamens (adnate to perianth) are unique to Liliaceae. Epipetalous stamens (adnate to corolla) characterize Solanaceae. Monadelphous monothecous stamens characterize Malvaceae (China rose).

Step 3

Conclusion

The combination of diadelphous stamens and dithecous anthers uniquely differentiates Fabaceae from Solanaceae and Liliaceae.

⭐

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 1

✗ Incorrect

Verdict & Scientific Reason:

Epiphyllous stamens (attached to perianth) are characteristic of Liliaceae, not Fabaceae.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing perianth adnation (Liliaceae) with legume floral morphology.

2 2

✓ 100% Correct

Verdict & Scientific Reason:

Accurate NCERT floral formula: Fabaceae stamens are ten, diadelphous $(9)+1$ , with dithecous anthers.

💡

Why this is airtight: None; canonical diagnostic.

3 3

✗ Incorrect

Verdict & Scientific Reason:

Polyadelphous stamens occur in Citrus; epipetalous stamens occur in Solanaceae.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing multi-bundle Citrus stamens with Fabaceae diadelphy.

4 4

✗ Incorrect

Verdict & Scientific Reason:

Monadelphous and monothecous stamens are characteristic of Malvaceae (China rose), not Fabaceae.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing cotton/hibiscus floral traits with legumes.

⚠️

NTA Trap Alert: Stamen Fusion Terminology Trap

Students frequently mix up "monadelphous" (one bundle, e.g., China rose), "diadelphous" (two bundles, e.g., pea), and "polyadelphous" (more than two bundles, e.g., Citrus).

🛡️ How to avoid the -1 mark: Remember: Pea/Fabaceae has 9 united + 1 free = 2 bundles = Diadelphous.

📖

Core NEET Syllabus Standard

NCERT Biology · Morphology of Flowering Plants Standard Benchmark

Core Scientific Principle Tested:

"Androecium of Fabaceae: ten, diadelphous, anther dithecous."

Syllabus Focus: Description of Some Important Families (Fabaceae)

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

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NEET 2023 Botany Question 111 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Fabaceae Androecium Formula: 9 + 1 Diadelphous

Step-by-Step Rigorous Workflow & Mathematical Proof

Comparative Androecium Morphology Across Families

Elimination of Non-Fabaceae Features

Conclusion

360° Option Elimination Engine Key Feature

NTA Trap Alert: Stamen Fusion Terminology Trap

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

🔗 Related Questions — Morphology of Flowering Plants

Definition and Patterns of Phyllotaxy (Leaf Arrangement)

Diagnostic Characters of Family Solanaceae (Potato Family)

Types of Placentation in Angiospermic Ovaries

Decoding Floral Symbols: Symmetry (⊕) and Gynoecium Position (G)

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