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Zoology - Organisms and Populations

Practise 98 NEET previous year questions on Organisms and Populations, compiled from papers spanning 2002 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty NEET tests.

Organisms and Populations has been asked in 24 of the 39 years of NEET papers analysed (1988–2026), with 105 questions in all. 59% of them were easy, 34% moderate and 7% tough. Most of its questions came from 2023, with 8 questions that year. In the last three years (2024–2026) it had 17 questions across 13 papers, about 1.3 per paper.

The chapter's 9 topics are not weighted equally: Populations (64 questions, 61%), Organisms and its Environment (14 questions, 13%), and Ecological Adaptations (6 questions, 6%) have been asked the most. Populations has also led over the last five years, with 25 questions. Populations has produced the most tough questions (2).

  1. 1Epiphytes that are growing on a mango branch is an example of which of the following?2025Populations
  2. 2Who is known as the father of Ecology in India?2025Introduction
  3. 3Given below are two statements : Statement I : Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it. Statement II : Fig wa2025Populations
  4. 4Which one of the following equations represents the Verhulst-Pearl Logistic Growth of population?2025Populations
  5. 5The equation of Verhulst-Pearl logistic growth is . From this equation, K indicates:2024Populations
  6. 6Given below are two statements: Statement I: Gause's competitive exclusion principle states that two closely related species competing for d2024Populations
  7. 7When will the population density increase, under special conditions? When the number of :2024 (Re-NEET)Populations
  8. 8Match List-I with List-II: {array}{|l|l|l|l|} & List I & & List II \\ A. & Predator & I. & Ophrys \\ B. & Mutualism & II. & Pisaster \\ C. &2024 (Re-NEET)Populations
  9. 9Match List-I with List-II Choose the correct answer from the options given below:2024 (Re-NEET)Populations
  10. 10What do 'a' and 'b' represent in the following population growth curve?2024 (Re-NEET)Populations
  11. 11Match List I with List II: List I (Interaction) List II (Species A and B) A. Mutualism I. +(A), 0(B) B. Commensalism II. -(A), 0(B) C. Amens2023 (All India)Populations
  12. 12Given below are two statements: Statement I: Gause s Competitive Exclusion Principle states that two closely related species competing for t2023 (All India)Populations
  13. 13Match List I with List II: List I (Interacting species) List II (Name of Interaction) A. A Leopard and a Lion in a forest/grassland I. Compe2023 (All India)Populations
  14. 14Match List I with List II : List I List II A. Logistic growth I. Unlimited resource availability condition B. Exponential growth II. Limited2023 (All India)Populations
  15. 15Plants offer rewards to animals in the form of pollen and nectar and the animals facilitate the pollination process. This is an example of :2023 (Manipur)Populations
  16. 16For chemical defence against herbivores, Calotropis has2023 (Manipur)Populations
  17. 17If there are 250 snails in a pond, and within a year their number increases to 2500 by reproduction. What should be their birth rate per sna2023 (Manipur)Populations
  18. 18Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : A person goes to h2023 (Manipur)Ecological Adaptations
  19. 19Which one of the following statements cannot be connected to Predation?2022 (Phase 1)Populations
  20. 20While explaining interspecific interaction of population, + sign is assigned for beneficial interaction, - sign is assigned for detrimental 2022 (Phase 1)Populations
  21. 21If 8 Drosophila in a laboratory population of 80 died during a week, the death rate in the population is ____ individuals per Drosophila per2022 (Phase 1)Populations
  22. 22The species that come to appear in bare area are called :2022 (Phase 2)Populations
  23. 23Frugivorous birds are found in large numbers in tropical forests mainly because of :2022 (Phase 2)Organisms and its Environment
  24. 24Two butterfly species are competing for the same nectar of a flower in a garden. To survive and coexist together, they may avoid competition2022 (Phase 2)Populations
  25. 25Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?2021Populations
  26. 26Amensalism can be represented as:2021Populations
  27. 27In the exponential growth equation N t = N 0 e rt , e , represents:2021Populations
  28. 28Assertion (A): A person goes to high altitude and experiences altitude sickness with symptoms like breathing difficulty and heart palpitatio2021Response to Abiotic Factors
  29. 29Match List - I with List - II . List - I List - II (a) Allen s Rule (i) Kangaroo rat (b) Physiological adaptation (ii) Desert lizard (c) Beh2021Response to Abiotic Factors
  30. 30Which of the following is not an attribute of a population?2020 (Phase 1)Populations
  31. 31A species which was introduced for ornamentation but has become a trouble-some weed in India:2020 (Phase 2)Populations
  32. 32Match the items in Column - I with those in Column - II : Column - I Column - II (a) Herbivores-Plants (i) Commensalism (b) Mycorrhiza-Plant2020 (Phase 2)Populations
  33. 33The impact of immigration on population density is:2020 (Phase 2)Populations
  34. 34Match Column - I with Column - II Column-I Column-II a Saprophyte i Symbiotic association of fungi with plant roots b Parasite i i Decomposi2019 (All India)Populations
  35. 35Carnivorous animals-lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This m2019 (Odisha)Populations
  36. 36A population of a species invades a new area. Which of the following conditions will lead to adaptive radiation?2019 (Odisha)Populations
  37. 37Between which among the following, the relationship is not an example of commensalism?2019 (Odisha)Populations
  38. 38Natality refers to2018Populations
  39. 39Niche is2018Organisms and its Environment
  40. 40In a growing population of the country,2018Populations
  41. 41Which one of the following population interactions is widely used in medical science for the production of antibiotics?2018Populations
  42. 42Asymptote is a logistic growth curve is obtained when2017Populations
  43. 43Gause's principle of competitive exclusion states that:2016 (Phase 1)Organisms and its Environment
  44. 44When does the growth rate of a population following the logistic model equal zero? The logistic model is given as d N / d t = r N 1 - N / K 2016 (Phase 1)Populations
  45. 45The primary producers of the deep-sea hydrothermal vent ecosystem are2016 (Phase 2)Branches of Ecology
  46. 46Which of the following is correct for r-selected species?2016 (Phase 2)Populations
  47. 47If + sign is assigned to beneficial interaction, sign to detrimental and 0 sign to neutral interaction, then the population interaction repr2016 (Phase 2)Populations
  48. 48The principle of competitive exclusion was stated by2016 (Phase 2)Populations
  49. 49Most animals are tree dwellers in a:2015 (Phase 1)Organisms and its Environment
  50. 50The following graph depicts changes in two populations (A and B) of herbivores in a grassy field. A possible reason for these changes is tha2015 (Phase 1)Organisms and its Environment

Frequently Asked Questions

1.How many questions are available for Organisms and Populations?

This chapter includes 98 questions compiled from NEET papers spanning 2002 to 2025.

2.Are these questions only from NEET, or from other exams too?

These are NEET questions specifically for the Organisms and Populations chapter. Questions from other exams like AIIMS or JIPMER are organised separately under their respective exam sections.

3.Is Organisms and Populations an important chapter for NEET Zoology?

Organisms and Populations has appeared in 23 of the 25 years of NEET papers covered here, with 98 questions across 33 papers - about 3 per paper it appears in.

4.What is the difficulty level of Organisms and Populations questions in NEET?

Of the 105 questions analysed for this chapter, 59% are easy, 34% moderate and 7% tough. 2023 had the most, with 8 questions.

5.Which topics in Organisms and Populations should I focus on?

These topics have carried the most weightage in Organisms and Populations:

  • Populations - 64 questions (61%)
  • Organisms and its Environment - 14 questions (13%)
  • Ecological Adaptations - 6 questions (6%)
  • Populations has produced the most tough questions (2).
6.Is Organisms and Populations's weightage in NEET going up or down?

Across all 33 papers analysed, Organisms and Populations has averaged about 3.0 questions per paper. In the last three years (2024–2026), that average has fallen, at about 1.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.