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Organisms And Populations Questions

Practice 25 Organisms And Populations questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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25
Total Questions
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9
Easy
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15
Medium
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1
Hard
Practice by Exam:Biology(23)BIOLOGY(2)

About Organisms and Populations — practice questions, PYQs & concepts

Organisms and Populations is a frequently-tested topic on Biology, BIOLOGY. ExamTest.live currently lists 25 Organisms and Populations questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

Organisms and Populations weight in competitive exams

Across our Organisms and Populations question bank, the largest sources are Biology (23) and BIOLOGY (2). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 9 easy Organisms and Populations questions are available — build fluency before moving up.
  • Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
  • Time yourself: Every question shows the average solve time so you can benchmark your speed against other students.
  • Read every explanation: Even on questions you got right — the explanation often surfaces a faster approach you can reuse.

All Organisms And Populations Questions(1–25 of 25)

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Q1mediummcqBiologyNEET (UG) 20172026
0% accuracy
Asymptote in a logistic growth curve is obtained when:
Q2easymcqBiologyNEET (UG) 20172026
0% accuracy
Mycorrhizae are the example of:
Q3mediummcqBiologyNEET 2020 E12026
Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:
Q4mediummcqBiologyNEET 2020 E12026
Which of the following is not an attribute of a population?
Q5mediummcqBIOLOGYNEET 20192026
Between which of the following, the relationship is not an example of commensalism?
Q6mediummcqBIOLOGYNEET 20192026
Carnivorous animals - lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as:
Q7mediummcqBiologyNEET (UG) 20182026
In a growing population of a country:
Q8easymcqBiologyNEET (UG) 20182026
Which one of the following population interactions is widely used in medical science for the production of antibiotics?
Q9easymcqBiologyNEET (UG) 20182026
Natality refers to:
Q10easymcqBiologyNEET (UG) 20182026
Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
Q11mediummcqBiologyBiology
0% accuracy
Select the correct pair of adaptations to environment in desert lizards:(a) Burrowing in soil to escape high temperature(b) Losing heat rapidly from the body during high temperature(c) Bask in sun when temperature is low(d) Insulating body due to thick fatty dermis
Q12easymcqBiologyBiology
The primary producers of the deep-sea hydrothermal vent ecosystem are:
Q13easymcqBiologyBiology
The principle of competitive exclusion was stated by:
Q14mediummcqBiologyBiology
Which of the following is correct for -selected species?
Q15mediummcqBiologyBiology
Praying mantis is a good example of:
Q16mediummcqBiologyBiology
When does the growth rate of a population following the logistic model equal zero? The logistic model is given as :
Q17easymcqBiologyBiology
Gause's principle of competitive exclusion states that:
Q18easymcqBiologyBiology
Cuscuta is an example of:
Q19easymcqBiologyBiology
The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do and represent respectively?
image
Q20mediummcqBiologyBiology
Study the four statements () and select the two correct ones:(a) A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers.(b) Predator star fish Pisaster helps in maintaining species diversity of some invertebrates.(c) Predators ultimately lead to the extinction of prey species.(d) Production of chemicals such as nicotine by plants are metabolic disorders.
Q21hardmcqBiologyBiology
Which two of the following changes usually occur in plain dwellers when they move to high altitudes ( or more)?(a) Increase in red blood cell size(b) Increase in red blood cell production(c) Increased breathing rate(d) Increase in thrombocyte count
Q22mediummcqBiologyBiology
Which two of the following statements about the kangaroo rat are true?(a) Dark colour, high reproduction rate, solid urine.(b) Do not drink water, breathe slow, covered in thick hair.(c) Feed on dry seeds and do not require drinking water.(d) Excrete very concentrated urine and do not use water for thermoregulation.
Q23mediummcqBiologyBiology
Annual migration does not occur in the case of:
Q24mediummcqBiologyBiology
Niche overlap indicates
Q25mediummcqBiologyBiology
The formula for exponential population growth is :

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We have 25 Organisms And Populations questions spread across 1 pages, covering easy, medium, and hard difficulty levels with detailed explanations.
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Organisms And Populations questions are commonly asked in Biology, BIOLOGY. You can filter by exam using the links above.
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Start with easy questions to build confidence, then tackle medium and hard ones. Use the filter buttons to sort by difficulty. Reveal the answer only after attempting each question, and read the explanation thoroughly.