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Biology - Organisms and Populations

Practise 37 MHT-CET (PCB) previous year questions on Organisms and Populations, compiled from papers in 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty MHT-CET (PCB) tests.

Organisms and Populations has been asked in 1 of the 1 years of MHT-CET (PCB) papers analysed (2026), with 37 questions in all. 54% of them were easy, 46% moderate and 0% tough. Most of its questions came from 2026, with 37 questions that year. In 2026 it had 37 questions across 11 papers, about 3.4 per paper.

The chapter's 6 topics are not weighted equally: Populations (23 questions, 62%), Ecological Adaptations (7 questions, 19%), and Response to Abiotic Factors (4 questions, 11%) have been asked the most.

  1. 1Select the statement which explains the commensalism best.26 Apr, 2026 (M)Populations
  2. 2Identify the correct equation with respect to diagram below, which depicts decrease in population density.26 Apr, 2026 (M)Populations
  3. 3Match the Pairs Column- I (Type of Interaction) Column- II (Mechanism involved) A) Competition I) loss of digestive system B) Prey - predati26 Apr, 2026 (M)Populations
  4. 4In accordance to their life styles ________ have evolved characters like loss of unnecessary sense organs, suckers, loss of digestive system25 Apr, 2026 (M)Ecological Adaptations
  5. 5Absolute natality is ________ .25 Apr, 2026 (M)Populations
  6. 6Conformers are those organisms ________ .25 Apr, 2026 (M)Response to Abiotic Factors
  7. 7Which of the following statements is INCORRECT regarding Niche?25 Apr, 2026 (E)Populations
  8. 8Which of the following depicts Exponential growth curve of a population?25 Apr, 2026 (E)Populations
  9. 9As a efficient reproductive strategy under environmental selection pressure, some organisms like _________ and _________ produce a small num25 Apr, 2026 (E)Populations
  10. 10Which one of the following is INCORRECT regarding brood parasitism?25 Apr, 2026 (E)Population Interactions
  11. 11Basic unit of ecological hierarchy is ___________.24 Apr, 2026 (M)Introduction
  12. 12In a population, the most common evolutionary stable strategy for a sex ratio is when _________.24 Apr, 2026 (M)Populations
  13. 13Density of population of a species decreases in case of which of the following phenomena? A. Increase in immigration B. Decrease in birth ra24 Apr, 2026 (M)Populations
  14. 14Which one of the following is NOT an example of prey-predator interaction?24 Apr, 2026 (M)Populations
  15. 15Various morphological, physiological and behavioural attributes of an organism to survive and reproduce in its habitat is said to be ______24 Apr, 2026 (E)Ecological Adaptations
  16. 16Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R). Assertion (A) : Most of the poikiloth24 Apr, 2026 (E)Response to Abiotic Factors
  17. 17If the population of a country has the mutual relation of different age groups as shown below, then what type of population growth will that24 Apr, 2026 (E)Populations
  18. 18Select the INCORRECT statement from the following with respect to osmoregulation.23 Apr, 2026 (M)Response to Abiotic Factors
  19. 19Desert lizards bask in the sun and absorb heat, when their body temperature drops below the comfort zone, but move into shade, when the ambi23 Apr, 2026 (M)Ecological Adaptations
  20. 20Which of the following population interaction is represented by the signs: ,23 Apr, 2026 (M)Populations
  21. 21Given below are two statements related to natality and mortality: Statement (I): Absolute natality will be always more than realized natalit23 Apr, 2026 (M)Populations
  22. 22The dissolved salt concentration is ---- in the fresh water of the streams.23 Apr, 2026 (E)Organisms and its Environment
  23. 23In animals, if the organisms is unable to migrate, it may go into ------during winter.23 Apr, 2026 (E)Response to Abiotic Factors
  24. 24The principle of 'competitive exclusion' was stated by23 Apr, 2026 (E)Populations
  25. 25Which of the following associations is NOT an example of commensalism?23 Apr, 2026 (E)Populations
  26. 26Birds living in the same habitat differ in their niches because they ____.22 Apr, 2026 (M)Populations
  27. 27' Resource partitioning ' in a natural habitat means ____.22 Apr, 2026 (M)Populations
  28. 28The tiger census in our national parks and tiger reserves is often based on ____.22 Apr, 2026 (E)Populations
  29. 29Which of the following statements are correct about niche? (A). It denotes the functional role played by an organism. (B). The same niche is22 Apr, 2026 (E)Populations
  30. 30Given below are two statements about desert plants. Statement (I): Desert plants have thick cuticle on their leaf surfaces and sunken stomat22 Apr, 2026 (E)Ecological Adaptations
  31. 31The position of an organism in the environmental gradient is called ---------------------.21 Apr, 2026 (M)Populations
  32. 32What kind of adaptation is shown by desert lizards to survive in their habitats ?21 Apr, 2026 (M)Ecological Adaptations
  33. 33Which out of the four basic processes that act on the population growth contribute to an increase in population density ?21 Apr, 2026 (M)Populations
  34. 34Select the INCORRECT match.21 Apr, 2026 (M)Populations
  35. 35Polar bears are restricted to a narrow range of temperature hence they are21 Apr, 2026 (E)Ecological Adaptations
  36. 36Select the INCORRECT statement about Opuntia :21 Apr, 2026 (E)Ecological Adaptations
  37. 37Select the INCORRECT pair from the following:21 Apr, 2026 (E)Populations

Frequently Asked Questions

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

This chapter includes 37 questions compiled from MHT-CET (PCB) papers in 2026.

2.Are these questions only from MHT-CET (PCB), or from other exams too?

These are MHT-CET (PCB) questions specifically for the Organisms and Populations chapter. Questions from other exams like NEET or AIIMS are organised separately under their respective exam sections.

3.Is Organisms and Populations an important chapter for MHT-CET (PCB) Biology?

Organisms and Populations has appeared in 1 of the 1 year of MHT-CET (PCB) papers covered here, with 37 questions across 11 papers - about 3 per paper it appears in.

4.What is the difficulty level of Organisms and Populations questions in MHT-CET (PCB)?

Of the 37 questions analysed for this chapter, 54% are easy, 46% moderate and 0% tough. 2026 had the most, with 37 questions.

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

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

  • Populations - 23 questions (62%)
  • Ecological Adaptations - 7 questions (19%)
  • Response to Abiotic Factors - 4 questions (11%)
6.Is Organisms and Populations's weightage in MHT-CET (PCB) going up or down?

Across all 11 papers analysed, Organisms and Populations has averaged about 3.4 questions per paper. In 2026, that average has stayed about the same, at about 3.4 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.