Q.129 Botany ⭐ 360° Option Elimination Active

NEET 2026 Botany Question 129 Solution

Topic: Biological Classification · Official NTA Booklet Code 50

Question

Match List-I with List-II. List I: A. Fusion of protoplasms between gametes; B. Fusion of two nuclei; C. Generation of haploid spores. List II: I. Meiosis; II. Plasmogamy; III. Karyogamy. Choose the correct answer from the options given below:

✓

Verified Against NTA Final Answer Key

Option (1) : A-II, B-III, C-I

📚 Biological Classification Easy

📋 Given Parameters & Problem Setup

List-I Events A. Fusion of protoplasms between gametes, B. Fusion of two nuclei, C. Generation of haploid spores

List-II Biological Terms I. Meiosis, II. Plasmogamy, III. Karyogamy

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The 30-Second Exam Hall Shortcut: ⚡ Fungal Sexual Triad Rule

⏱️ Save ~40 seconds

Protoplasm = Plasmogamy (II); Nuclei = Karyogamy (III); Haploid Spores = Meiosis (I)!

1 A. Fusion of protoplasms -> Plasmogamy (II).

2 B. Fusion of two nuclei -> Karyogamy (III).

3 C. Generation of haploid spores in zygote -> Meiosis (I).

4 Sequence: A-II, B-III, C-I.

5 Matches Option (1) directly!

6 Pick Option (1) in under 5 seconds.

🛡️

Why You Can 100% Trust This Shortcut: NCERT Biology · Biological Classification (Kingdom Fungi: Mycelium, coenocytic hyphae, and spore reproduction).

📐

Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Step 1 of Fungal Sexual Cycle: Plasmogamy (A)

The sexual cycle in fungi involves three distinct sequential steps. The first step is the fusion of naked or motile/non-motile protoplasms between two compatible gametes or hyphae without immediate fusion of nuclei. This is termed Plasmogamy.

\text{Fusion of protoplasms} \equiv \mathbf{Plasmogamy\text{ (II)}}

• A correlates with II.

Step 2

Step 2 of Fungal Sexual Cycle: Karyogamy (B)

Following plasmogamy (either immediately in lower fungi or after a prolonged dikaryotic phase $n+n$ in Ascomycetes and Basidiomycetes), the two haploid nuclei fuse to form a diploid zygotic nucleus ( $2n$ ). This nuclear fusion is termed Karyogamy.

\text{Fusion of two nuclei} \equiv \mathbf{Karyogamy\text{ (III)}}

• B correlates with III.

Step 3

Step 3 of Fungal Sexual Cycle: Meiosis (C)

The diploid nucleus undergoes reductional division (meiosis) within the zygote or fruiting body to regenerate haploid spores (ascospores or basidiospores).

\text{Meiosis in zygote} \implies \mathbf{Generation\text{ of haploid spores (I)}}

• C correlates with I.

Step 4

Synthesize Combination

The complete pairing is: A-II, B-III, C-I. This corresponds exactly to Option (1).

\text{Match}: \mathbf{A}\text{-II}, \; \mathbf{B}\text{-III}, \; \mathbf{C}\text{-I} \implies \text{Option (1)}

• Matches official NTA final answer key Option A / (1).

⭐

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% accurate match across all three canonical stages of the fungal sexual cycle.

💡

Why this is airtight: None; flawless recall of fungal biology.

2 B

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Links nuclear fusion to meiosis and spore formation to karyogamy.

⚠️

Student Fallacy (Why candidates pick this trap): Swapped Karyogamy and Meiosis.

3 C

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Claims protoplasm fusion is karyogamy.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing cytoplasm/protoplasm with nucleus.

4 D

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Scrambled match linking protoplasm fusion to meiosis.

⚠️

Student Fallacy (Why candidates pick this trap): Random guessing.

⚠️

NTA Trap Alert: Etymological Anchor for Karyon vs Plasma

Students get confused between Plasmogamy and Karyogamy. Greek "karyon" means nut/nucleus, and "plasma" means fluid/protoplasm.

🛡️ How to avoid the -1 mark: Plasma fuses -> Plasmogamy; Karyon (Nucleus) fuses -> Karyogamy!

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Core NEET Syllabus Standard

NEET Biology Core Syllabus · Biological Classification Standard Benchmark

Core Scientific Principle Tested:

"The sexual reproduction cycle in fungi proceeds via: (1) Plasmogamy (fusion of protoplasms), (2) Karyogamy (fusion of nuclei), and (3) Meiosis (yielding haploid spores)."

Syllabus Focus: Kingdom Fungi - Reproduction

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

P-K-M: Plasmogamy merges plasma, Karyogamy merges cores, Meiosis makes the haploid spores!

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NEET 2026 Botany Question 129 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Fungal Sexual Triad Rule

Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1 of Fungal Sexual Cycle: Plasmogamy (A)

Step 2 of Fungal Sexual Cycle: Karyogamy (B)

Step 3 of Fungal Sexual Cycle: Meiosis (C)

Synthesize Combination

360° Option Elimination Engine Key Feature

NTA Trap Alert: Etymological Anchor for Karyon vs Plasma

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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