Q.164 Zoology ⭐ 360° Option Elimination Active

NEET 2023 Zoology Question 164 Solution

Topic: Animal Kingdom · Official NTA Booklet Code G5

Question

Match List I with List II. List I: A. Taenia; B. Paramoecium; C. Periplaneta; D. Pheretima. List II: I. Nephridia; II. Contractile vacuole; III. Flame cells; IV. Urecose gland. Choose the correct answer from the options given below:

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Verified Against NTA Final Answer Key

Option (4) : A-III, B-II, C-IV, D-I

📚 Animal Kingdom Easy

📋 Given Parameters & Problem Setup

Organisms Taenia (Tapeworm), Paramoecium, Periplaneta (Cockroach), Pheretima (Earthworm)

Excretory Structures Nephridia, Contractile vacuole, Flame cells, Urecose gland

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The 30-Second Exam Hall Shortcut: ⚡ Excretory Organ 1-to-1 Matcher

⏱️ Save ~25 seconds

Match each organism to its diagnostic excretory structure: Taenia (flatworm) = Flame cells (III). Paramoecium = Contractile vacuole (II). Periplaneta (cockroach) = Urecose gland (IV). Pheretima (earthworm) = Nephridia (I)! Match Option (4)!

1 Taenia (Platyhelminthes): Protonephridia with flame cells -> A-III.

2 Paramoecium (Ciliate Protozoa): Contractile vacuole for osmoregulation -> B-II.

3 Periplaneta (Cockroach): Urecose glands (mushroom gland peripheral tubules in male) assist excretion -> C-IV.

4 Pheretima (Earthworm): Nephridia (septal, integumentary, pharyngeal) -> D-I.

5 Match combination: A-III, B-II, C-IV, D-I -> Option (4).

🛡️

Why You Can 100% Trust This Shortcut: Canonical NCERT Animal Kingdom and Cockroach anatomy excretory profiles.

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Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Excretory Structures Across Animal Phyla

Correlating each taxon with its respective excretory or osmoregulatory adaptation:

\begin{aligned} \text{\textbf{A. } \textit{Taenia} \textbf{ (Tapeworm):}} & \quad \text{Flame cells (Solenocytes / Protonephridia)} \implies \mathbf{\text{III}} \\[4pt] \text{\textbf{B. } \textit{Paramoecium}\textbf{:}} & \quad \text{Contractile vacuole (Osmoregulation and excretion)} \implies \mathbf{\text{II}} \\[4pt] \text{\textbf{C. } \textit{Periplaneta} \textbf{ (Cockroach):}} & \quad \text{Urecose glands, fat body, nephrocytes, Malpighian tubules} \implies \mathbf{\text{IV}} \\[4pt] \text{\textbf{D. } \textit{Pheretima} \textbf{ (Earthworm):}} & \quad \text{Nephridia (coiled tubular excretory organs)} \implies \mathbf{\text{I}} \end{aligned}

Step 2

Cockroach Excretory Glands Detail

NCERT Structural Organisation in Animals states under Cockroach Excretion: "In addition, the fat body, nephrocytes and urecose glands also help in excretion."

Step 3

Option Cross-Verification

Matching A-III immediately isolates Option (4) uniquely, since all other options incorrectly match A with I or II.

⭐

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:

Mismatches Taenia with contractile vacuole.

⚠️

Student Fallacy (Why candidates pick this trap): Assigning unicellular vacuoles to multicellular flatworms.

2 2

✗ Incorrect

Verdict & Scientific Reason:

Mismatches Taenia with nephridia.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing flatworms with annelids.

3 3

✗ Incorrect

Verdict & Scientific Reason:

Mismatches Taenia with nephridia and Pheretima with flame cells.

⚠️

Student Fallacy (Why candidates pick this trap): Inverting flatworm and earthworm excretory organs.

4 4

✓ 100% Correct

Verdict & Scientific Reason:

Accurate pairing across all four organisms and their respective excretory organs.

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Why this is airtight: None; textbook verbatim match.

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NTA Trap Alert: Cockroach "Urecose Gland" Unfamiliarity Trap

Students mostly associate cockroaches with Malpighian tubules and often freeze when seeing "Urecose gland". NCERT explicitly lists urecose glands alongside fat body and nephrocytes as auxiliary excretory organs in cockroaches.

🛡️ How to avoid the -1 mark: Remember: Cockroach excretion = Malpighian tubules + Fat body + Nephrocytes + Urecose gland.

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Core NEET Syllabus Standard

NCERT Biology · Animal Kingdom & Structural Organisation in Animals Standard Benchmark

Core Scientific Principle Tested:

"Taenia uses flame cells; Paramoecium uses contractile vacuoles; Periplaneta uses urecose glands and Malpighian tubules; Pheretima uses nephridia."

Syllabus Focus: Excretory Systems Across Animal Phyla

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

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NEET 2023 Zoology Question 164 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Excretory Organ 1-to-1 Matcher

Step-by-Step Rigorous Workflow & Mathematical Proof

Excretory Structures Across Animal Phyla

Cockroach Excretory Glands Detail

Option Cross-Verification

360° Option Elimination Engine Key Feature

NTA Trap Alert: Cockroach "Urecose Gland" Unfamiliarity Trap

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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