Q.189 Zoology ⭐ 360° Option Elimination Active

NEET 2023 Zoology Question 189 Solution

Topic: Organisms and Populations · Official NTA Booklet Code G5

Question

Match List I with List II. List I: A. Logistic growth; B. Exponential growth; C. Expanding age pyramid; D. Stable age pyramid. List II: I. Unlimited resource availability condition; II. Limited resource availability condition; III. The percent individuals of pre-reproductive age is largest followed by reproductive and post reproductive age groups; IV. The percent individuals of pre-reproductive and reproductive age group are same. Choose the correct answer from the options given below:

✓

Verified Against NTA Final Answer Key

Option (2) : A-II, B-I, C-III, D-IV

📚 Organisms and Populations Easy

📋 Given Parameters & Problem Setup

List I (Growth / Pyramid Types) Logistic growth, Exponential growth, Expanding age pyramid, Stable age pyramid

List II (Conditions / Structures) Unlimited resources, Limited resources, Pre-reproductive largest, Pre-reproductive equals reproductive

⚡

The 30-Second Exam Hall Shortcut: ⚡ Population Growth & Pyramid Matcher

⏱️ Save ~25 seconds

Match standard ecological definitions: Logistic growth = Limited resources / carrying capacity (II). Exponential growth = Unlimited resources (I). Expanding pyramid = Pre-reproductive population largest (III). Stable pyramid = Pre-reproductive equals reproductive (IV)! Match Option (2)!

1 Logistic growth: Resources are limited, growth reaches carrying capacity K -> A-II.

2 Exponential growth: Unlimited resource availability condition (J-shaped curve) -> B-I.

3 Expanding age pyramid: Triangular, percent individuals of pre-reproductive age is largest -> C-III.

4 Stable age pyramid: Bell-shaped, pre-reproductive and reproductive percent are nearly equal -> D-IV.

5 Match combination: A-II, B-I, C-III, D-IV -> Option (2).

🛡️

Why You Can 100% Trust This Shortcut: Canonical NCERT Organisms and Populations population dynamics and demography.

📐

Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Population Growth Models and Resource Availability

Analyzing the population growth curves described in NCERT:

\begin{aligned} \text{\textbf{A. Logistic growth:}} & \quad \frac{dN}{dt} = rN\left(\frac{K-N}{K}\right) \implies \mathbf{\text{Limited resources (II)}} \\[4pt] \text{\textbf{B. Exponential growth:}} & \quad \frac{dN}{dt} = rN \implies \mathbf{\text{Unlimited resources (I)}} \end{aligned}

Step 2

Demographic Structure of Age Pyramids

Analyzing the age distribution profiles of human populations:

\begin{aligned} \text{\textbf{C. Expanding pyramid:}} & \quad \text{Triangular: Pre-reproductive } > \text{ Reproductive } > \text{ Post-reproductive} \implies \mathbf{\text{III}} \\[4pt] \text{\textbf{D. Stable pyramid:}} & \quad \text{Bell-shaped: Pre-reproductive } \approx \text{ Reproductive} \implies \mathbf{\text{IV}} \end{aligned}

Step 3

Option Verification

Matching A-II, B-I, C-III, D-IV perfectly corresponds to Option (2).

⭐

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 Exponential growth with stable pyramid description.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing growth curves with age structures.

2 2

✓ 100% Correct

Verdict & Scientific Reason:

Flawless 1-to-1 match with the canonical NCERT population growth and demography definitions.

💡

Why this is airtight: None; textbook verbatim match.

3 3

✗ Incorrect

Verdict & Scientific Reason:

Mismatches Exponential growth with expanding pyramid.

⚠️

Student Fallacy (Why candidates pick this trap): Swapping growth models and pyramid types.

4 4

✗ Incorrect

Verdict & Scientific Reason:

Scrambles all associations.

⚠️

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

⚠️

NTA Trap Alert: Expanding vs. Declining Age Pyramid Trap

Expanding = Pre-reproductive is largest (broad base). Stable = Pre-reproductive and reproductive are equal. Declining = Pre-reproductive is smaller than reproductive (narrow base).

🛡️ How to avoid the -1 mark: Broad base (largest pre-reproductive) = Expanding. Equal base and middle = Stable.

📖

Core NEET Syllabus Standard

NCERT Biology · Organisms and Populations Standard Benchmark

Core Scientific Principle Tested:

"Logistic growth occurs with limited resources; Exponential growth occurs with unlimited resources; Expanding pyramid has largest pre-reproductive age; Stable pyramid has equal pre-reproductive and reproductive groups."

Syllabus Focus: Population Growth & Age Pyramids

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

Ready to attempt under real exam pressure?

Test your speed and accuracy in the authentic 200-minute timed NTA simulator.

Launch NEET 2023 CBT Test →

← Previous (Q.188) All Zoology Questions Grid Next (Q.190) →

Spotted a mistake in this solution? Report an error (support@mycompetitiveexams.com)

⚖️ Legal & Fair Dealing Notice: Sourced from publicly released NEET 2023 question papers and NEET answer keys for private study, research, and non-commercial educational practice under Fair Dealing (Section 52(1)(a) of the Indian Copyright Act, 1957). Not affiliated with or endorsed by NTA or NMC.

NEET 2023 Zoology Question 189 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Population Growth & Pyramid Matcher

Step-by-Step Rigorous Workflow & Mathematical Proof

Population Growth Models and Resource Availability

Demographic Structure of Age Pyramids

Option Verification

360° Option Elimination Engine Key Feature

NTA Trap Alert: Expanding vs. Declining Age Pyramid Trap

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

🔗 Related Questions — Organisms and Populations

Population Growth Rate Calculation & Zero Growth State

Logistic vs. Exponential Growth & Carrying Capacity

Competitive Exclusion & Abingdon Tortoise Extinction

Classification of Species Interactions by Effect Signs (+, -, 0)

Solve 4 NEET Questions a Day — One per Subject