Q.120 Botany ⭐ 360° Option Elimination Active
NEET 2024 Botany Question 120 Solution
Topic: Morphology of Flowering Plants · Official NTA Booklet Code T1
Question
Which of the following is an example of actinomorphic flower?
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Verified Against NTA Final Answer Key
Option (3) : Datura
📚 Morphology of Flowering Plants Easy
📋 Given Parameters & Problem Setup
Feature Actinomorphic flower (radial symmetry)
Candidate Genera Mustard, Datura, Chilli vs Pea, Gulmohur, Bean, Cassia
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⏱️ Save ~20 seconds The 30-Second Exam Hall Shortcut: ⚡ Floral Symmetry Mnemonic
Actinomorphic = Mustard, Datura, Chilli (MDC -> Medical Dental College). Zygomorphic = Pea, Gulmohur, Bean, Cassia (PGBC). Datura is Actinomorphic!
1 Recall floral symmetry examples:
2 - Actinomorphic (radial symmetry): Mustard, Datura, Chilli.
3 - Zygomorphic (bilateral symmetry): Pea, Gulmohur, Bean, Cassia.
4 - Asymmetric (irregular): Canna.
5 Among the choices, Datura is actinomorphic -> Option (3) / C.
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Why You Can 100% Trust This Shortcut: NCERT Biology · Morphology of Flowering Plants (Floral Symmetry)
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Step-by-Step Rigorous Workflow & Mathematical Proof
Step 1
Define Actinomorphic Symmetry
When a flower can be divided into two equal radial halves in any radial plane passing through the centre, it is said to be actinomorphic (radial symmetry).
Step 2
Evaluate NCERT Genera
NCERT provides specific examples: Mustard, Datura, and Chilli are actinomorphic. Pea, Gulmohur, Bean, and Cassia are zygomorphic (can be divided into two similar halves only in one particular vertical plane).
Step 3
Match with Options
Datura possesses actinomorphic floral symmetry.
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4-Option Deep Scan
360° Option Elimination Engine Key Feature
Diagnose every choice: Know exactly why the right option works and why distractors fail.
1 (1)
✗ Incorrect Verdict & Scientific Reason:
Pea exhibits zygomorphic (bilateral) symmetry (papilionaceous corolla).
⚠️
Student Fallacy (Why candidates pick this trap): Pea exhibits zygomorphic (bilateral) symmetry (papilionaceous corolla).
2 (2)
✗ Incorrect Verdict & Scientific Reason:
Cassia flowers are zygomorphic.
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Student Fallacy (Why candidates pick this trap): Cassia flowers are zygomorphic.
3 (3)
✓ 100% Correct Verdict & Scientific Reason:
Datura flowers exhibit radial symmetry (actinomorphic).
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Why this is airtight: None.
4 (4)
✗ Incorrect Verdict & Scientific Reason:
Gulmohur flowers exhibit zygomorphic symmetry.
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Student Fallacy (Why candidates pick this trap): Gulmohur flowers exhibit zygomorphic symmetry.
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NTA Trap Alert: Cassia vs Chilli Confusion
Confusing Cassia (zygomorphic) with Chilli (actinomorphic).
🛡️ How to avoid the -1 mark: Remember: MDC = Mustard, Datura, Chilli are all Actinomorphic.
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Core NEET Syllabus Standard
Biology Core Botany · Morphology of Flowering Plants Standard Benchmark
Core Scientific Principle Tested:
"When a flower can be divided into two equal radial halves in any radial plane passing through the centre, it is said to be actinomorphic, e.g., mustard, datura, chilli."
Syllabus Focus: Actinomorphic (Radial) vs Zygomorphic (Bilateral) Floral Symmetry
✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗
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