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Ecology and Environment NEET 2024: Population Interactions Solved

NEET 2024 Biology Ecology and Environment Population Interactions - Competition

By Founder, JEEnius - IIT Kanpur Alumni · Aug 21, 2026 · 3 min read

Hard 2 min target

Match List-I with List-II.

List-I
A. Migratory flamingoes and resident fish in South American lakes
B. Abingdon tortoise became extinct after introduction of goats in their habitat
C. Chathamalus expands its distributional range in the absence of Balanus
D. Five closely related species of Warblers feeding in different locations on same tree

List-II
I. Interference competition
II. Competitive release
III. Resource Partitioning
IV. Interspecific competition

Choose the correct answer from the options given below:

Show answerAnswer

B) A-IV, B-I, C-II, D-III

Explanation

A. Migratory flamingoes and resident fish in South American lakes compete for common food resources. This is interspecific competition, so A matches IV.

B. Abingdon tortoise became extinct after goats were introduced in their habitat because goats had greater browsing efficiency and directly affected the tortoise population. This is an example of interference competition, so B matches I.

C. Chathamalus expands its distributional range when Balanus is absent. This happens because removal of a superior competitor allows the weaker species to occupy more area. This is competitive release, so C matches II.

D. Closely related warbler species feeding at different locations on the same tree avoid direct competition by using resources differently. This is resource partitioning, so D matches III.

Therefore, the correct matching is A-IV, B-I, C-II, D-III.

Watch the full solution, worked step by step.

What was the 2024 NEET match-the-following question on population interactions?

The 2024 NEET question matched four List-I examples to four List-II terms. The examples were migratory flamingoes with resident fish in South American lakes, Abingdon tortoise extinction after goats introduced, Chathamalus expanding range without Balanus, and five warbler species feeding at different tree locations. The terms were interference competition, competitive release, resource partitioning, and interspecific competition. Four options A to D rearranged the pairings.

This question sits in the Organisms and Populations unit and rewards precise application of NCERT distinctions over rote definitions.

How do you solve the official 2024 NEET match-list question on competition step by step?

A matches IV because flamingoes and fish compete for the same food resource. This is interspecific competition.

B matches I because goats possess greater browsing efficiency that directly reduces the tortoise population. The direct effect defines interference competition rather than simple resource sharing.

C matches II because absence of the superior competitor Balanus allows Chathamalus to expand its range. This is competitive release.

D matches III because warblers reduce competition by feeding at different parts of the same tree. This is resource partitioning.

Therefore the correct option is B: A-IV, B-I, C-II, D-III.

What method mistake produces a wrong option in this 2024 NEET question?

Treating every resource overlap as simple interspecific competition and missing the direct inhibitory action that defines interference competition produces one of the wrong options. The exact error pairs the tortoise-goat case with IV instead of I and the flamingo-fish case with I instead of IV. This reversal creates option A.

The fix is to scan descriptions for phrases indicating direct effect or superior efficiency versus mere shared resource use. Direct inhibition points to interference competition. Simple overlap points to interspecific competition.

How do interspecific competition, interference competition, competitive release and resource partitioning differ?

  • Interspecific competition: different species compete for same limited resource (flamingoes and fish example)
  • Interference competition: one species directly harms another beyond resource use (goats’ browsing efficiency on tortoise)
  • Competitive release: weaker species expands niche or range after superior competitor is removed (Chathamalus without Balanus)
  • Resource partitioning: species divide resource spatially or temporally to coexist (warblers at different tree heights)

What practice questions test the same population interaction concepts?

Question 1: When a superior competitor is experimentally removed from a habitat, the realised niche of the inferior competitor expands; this illustrates which phenomenon?

Answer: competitive release.

Question 2: Two barnacle species Balanus and Chathamalus occupy different intertidal zones when together but one expands when the other is absent; identify the interaction and outcome.

Answer: interspecific competition leading to competitive release.

Question 3: Five species of finches on Galapagos islands show differences in beak size to feed on different seed sizes; name the mechanism.

Answer: resource partitioning.

If you meet a fresh example you cannot classify, photograph a doubt and get a step-by-step solution across Biology in minutes.

How should this PYQ guide your NEET 2025 preparation in Ecology?

Revise every NCERT example on competition, predation, parasitism and mutualism from Chapter 13. The textbook lines are short yet each carries one distinguishing phrase.

Practice all previous-year match-list and assertion-reason questions on population interactions. Always classify an example by checking for “common resource” versus “direct inhibition” or “niche expansion after removal”.

Ecology and Environment contributes questions that reward precise concept application rather than rote learning. Use the past-paper archive to search past NEET papers by year, subject or chapter, each with a worked solution.

Next step: photograph a doubt on NEET JEEnius AI and photograph any question you are stuck on and get a step-by-step solution across Physics, Chemistry and Biology (20 free a month).

Keep going with Alternating Current Practice Questions NEET: Free Resources Compared.

Frequently asked questions

How do you solve the 2024 NEET population interactions match the following question?

Match A with IV because flamingoes and fish compete for the same food resource, showing interspecific competition. B matches I as goats directly reduce tortoise population through superior browsing efficiency, indicating interference competition. C pairs with II for competitive release in Chathamalus without Balanus, while D matches III for resource partitioning by warblers. The correct option is B.

What is the difference between interference competition and interspecific competition?

Interspecific competition occurs when different species compete for the same limited resource, such as flamingoes and resident fish. Interference competition involves one species directly harming another beyond mere resource overlap, like goats' browsing efficiency causing Abingdon tortoise extinction. Scan NCERT examples for phrases showing direct inhibition to distinguish them correctly in NEET.

What does competitive release mean according to NEET 2024 PYQ?

Competitive release is when a weaker competitor expands its realised niche after the superior competitor is removed. In the 2024 question, Chathamalus barnacle expands its intertidal range when Balanus is absent. This matches with example C and term II in the official paper.

What mistake do students commonly make in the 2024 NEET ecology competition question?

Students often treat every resource overlap as interspecific competition and fail to identify direct inhibitory action that defines interference competition. This swaps the tortoise-goat case with the flamingo-fish case, producing the wrong option A. Always check for direct effect or superior efficiency phrases in the descriptions.

competitive-releaseecologyneet-2024population-interactionspyqresource-partitioning

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