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Ecology Questions

Practice 187 Ecology questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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187
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97
Easy
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87
Medium
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3
Hard
Practice by Exam:Biology(163)Botany(7)General Awareness(7)General Knowledge(2)General Knowledge and General Awareness(2)General Science(2)Chemistry(1)Zoology(1)

About Ecology — practice questions, PYQs & concepts

Ecology is a frequently-tested topic on Biology, Botany, General Awareness. ExamTest.live currently lists 187 Ecology 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.

Ecology weight in competitive exams

Across our Ecology question bank, the largest sources are Biology (163), Botany (7), General Awareness (7), General Knowledge (2) and General Knowledge and General Awareness (2). Click any exam chip above to drill down to that exam-specific question set.

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  • Start easy: 97 easy Ecology questions are available — build fluency before moving up.
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All Ecology Questions(1–100 of 187)

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Q1easymcqGeneral AwarenessSSC Selection Post 2021 Matriculation Level2026
14% accuracy
Plant and animal communities living together in similar climatic conditions are called _____________.
Q2mediummcqGeneral AwarenessSSC GD2026
0% accuracy
Where did the Chipko movement first started in India?
Q3mediummcqGeneral ScienceSSC GD2026
0% accuracy
An ecosystem consists of:
Q4easymcqBiologyNEET 20192026
0% accuracy
Which of the following is the most important cause for animals and plants being driven to extinction?
Q5easymcqBiologyNEET (UG) 20172026
0% accuracy
Alexander Von Humboldt described for the first time:
Q6easymcqBiologyNEET 20192026
0% accuracy
Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for:
Q7easymcqBiologyNEET 20192026
0% accuracy
Which of these following methods is the most suitable for disposal of nuclear waste?
Q8easymcqBiologyNEET 20192026
0% accuracy
Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?
Q9easymcqGeneral AwarenessSSC Selection Post 2021 Matriculation Level2026
0% accuracy
The __________ is the primary layer of the rainforest and forms a roof over the two remaining layers.
Q10mediummcqBiologyNEET 20192026
0% accuracy
Which of the following ecological pyramids is generally inverted?
Q11easymcqBiologyNEET 20192026
0% accuracy
Which of the following pairs of gases is mainly responsible for greenhouse effect?
Q12easymcqBiologyNEET 20192026
0% accuracy
The Earth Summit held in Rio de Janeiro in 1992 was called:
Q13easymcqBiologyNEET (UG) 20172026
0% accuracy
The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as:
Q14mediummcqGeneral Knowledge and General AwarenessSSC CPO 20242026
0% accuracy
Which cycle comprises both sedimentary and gaseous cycles?
Q15easymcqChemistryNEET 20212026
0% accuracy
Which of the following statements is not correct?
Q16easymcqBiologyNEET 20192026
0% accuracy
Which one of the following is not a method in situ conservation of biodiversity?
Q17easymcqBiologyNEET (UG) 20172026
0% accuracy
Which one of the following is related to Ex-situ conservation of threatened animals and plants?
Q18mediummcqBiologyNEET 20222026
Given below are two statements:Statement I: In a scrubber, exhaust from the thermal plant is passed through electric wires to charge the dust particles.Statement II: Particular matter (PM 2.5) cannot be removed by scrubber but can be removed by an electrostatic precipitator.In the light of the above statements, choose the most appropriate answer from the options given below:
Q19easymcqBiologyNEET 20222026
Which one of the following statements cannot be connected to Predation?
Q20mediummcqGeneral AwarenessCompetitive Exam2026
Which of the following organisms is considered a bioindicator of water pollution?
Q21mediummcqSciencePrepp2026
Which Greek term was first used by Ernst Haeckel in 1866 to refer to ‘the relation of animals to both the organic as well as the inorganic environment’?
Q22mediummcqGeneral AwarenessSSC Combined Graduate Level Exam2026
___________ is the proper management of a natural resource to prevent its exploitation, destruction or degradation.
Q23mediummcqGeneral Knowledge and General AwarenessSSC CPO 20242026
Which of the following options is correctly matched?
Q24mediummcqGeneral KnowledgeCompetitive Exam2026
Which among the following was designated the first RAMSAR site under the Ramsar Convention in India?
Q25easymcqBotanyNEET 2024 R1@NUM: 1052026
The list of endangered species was released by:
Q26easymcqBiologyNEET 20232026
The historic Convention on Biological Diversity, ‘The Earth Summit’ was held in Rio de Janeiro in the year:
Q27easymcqBiologyNEET 20232026
In the equation , represents:
Q28easymcqBiologyNEET 20222026
Detritivores breakdown detritus into smaller particles. This process is called:
Q29mediummcqBiologyNEET 20222026
If ‘ ’ Drosophila in a laboratory population of ‘ ’ died during a week, the death rate in the population is ____ individuals per Drosophila per week.
Q30easymcqBiologyNEET 20222026
The device which can remove particulate matter present in the exhaust from a thermal power plant is:
Q31mediummcqGeneral AwarenessSSC CGL2026
K-selected species are characterised by:
Q32mediummcqGeneral KnowledgePrepp2026
Eutrophication can be defined as:
Q33mediummcqEnvironment and EcologyIndian Competitive Exams2026
Biotic potential can be defined as:
Q34easymcqBiologyNEET 20222026
While explaining interspecific interaction of population, sign is assigned for beneficial interaction, sign is assigned for detrimental interaction and for neutral interaction. Which of the following interactions can be assigned for one species and for another species?
Q35hardmcqBotanyNEET 2024 R1@NUM: 1262026
Tropical regions show greatest level of species richness because:A. Tropical latitudes have remained relatively undisturbed for millions of years, hence more time was available for species diversification.B. Tropical environments are more seasonal.C. More solar energy is available in tropics.D. Constant environments promote niche specialization.E. Tropical environments are constant and predictable.
Q36easymcqBotanyNEET 2024 R1@NUM: 1162026
The equation of Verhulst-Pearl logistic growth is . From this equation, indicates:
Q37easymcqBiologyNEET 20232026
Match List I with List II regarding species interactions:| List I (Interaction) | List II (Species A and B) || :--- | :--- || A. Mutualism | I. (A), (B) || B. Commensalism | II. (A), (B) || C. Amensalism | III. (A), (B) || D. Parasitism | IV. (A), (B) |
Q38mediummcqBiologyNEET 20232026
Match List 1 and List 2 regarding population growth and pyramids:| List 1 | List 2 || :--- | :--- || A. Logistic growth | I. Unlimited resource condition || B. Exponential growth | II. Limited resource condition || C. Expanding age pyramid | III. Pre-reproductive age group is largest || D. Stable age pyramid | IV. Pre-reproductive and reproductive groups are equal |
Q39easymcqBiologyNEET 20222026
In situ conservation refers to:
Q40easymcqBiologyNEET 20222026
The entire fleet of buses in Delhi were converted to CNG from diesel. In reference to this, which one of the following statements is false?
Q41easymcqBiologyNEET 20222026
Habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction are causes for:
Q42easymcqBotanyNEET 2024 R1@NUM: 1082026
The type of conservation in which the threatened species are taken out from their natural habitat and placed in a special setting where they can be protected and given special care is called:
Q43easymcqBiologyNEET 20232026
Among ‘The Evil Quartet’ which one is considered the most important cause driving extinction of species?
Q44easymcqBiologyNEET 20222026
Given below are two statements:Statement I: Decomposition is a process in which the detritus is degraded into simpler substances by microbes.Statement II: Decomposition is faster if the detritus is rich in lignin and chitin.In the light of the above statements, choose the correct answer from the options given below:
Q45easymcqBiologyNEET 20222026
Which of the following is not a method of ex situ conservation?
Q46easymcqBiologyNEET 20212026
In the equation , represents:
Q47mediummcqBotanyNEET 2024 R1@NUM: 1402026
In an ecosystem, if the Net Primary Productivity (NPP) of the first trophic level is , what would be the NPP of the third trophic level, assuming transfer?
Q48easymcqBiologyNEET 20212026
The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as:
Q49easymcqBiologyNEET 20212026
Amensalism can be represented as:
Q50mediummcqBiologyNEET 2020 E12026
Which of the following is not an attribute of a population?
Q51mediummcqGeneral ScienceStaff Selection Commission2026
Which of the following statements about ‘Biological Magnification’ is FALSE?
Q52mediummcqBotanyNEET 2024 R1@NUM: 1322026
These are regarded as major causes of biodiversity loss:A. OverexploitationB. Co-extinctionC. MutationD. Habitat loss and fragmentationE. Migration
Q53easymcqBiologyNEET 20212026
In spite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?
Q54easymcqBiologyNEET 20172026
Which of the following in sewage treatment removes suspended solids?
Q55easymcqBiologyNEET 20172026
Which one of the following statements is not valid for aerosols?
Q56easymcqBiologyNEET 20172026
Presence of plants arranged into well defined vertical layers depending on their height can be seen best in:
Q57hardmcqBiologyNEET 20172026
Asymptote in a logistic growth curve is obtained when:
Q58easymcqBiologyNEET 20172026
Which ecosystem has the maximum biomass?
Q59hardassertion/reasoningZoologyNEET 2024 R1@NUM: 1912026
Given below are two statements:
Q60mediummcqBiologyNEET 20232026
Identify the correct statements:A. Detritivores perform fragmentation.B. The humus is further degraded by some microbes during mineralization.C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching.D. The detritus food chain begins with living organisms.E. Earthworms break down detritus into smaller particles by a process called catabolism.Choose the correct answer from the options given below:
Q61easymcqBiologyNEET 20222026
Which one of the following will accelerate phosphorus cycle?
Q62easymcqBiologyNEET 20232026
Match List I with List II regarding interactions:| List I (Interacting species) | List II (Name of Interaction) || :--- | :--- || A. A Leopard and a Lion in a forest | I. Competition || B. A Cuckoo laying egg in a Crow’s nest | II. Brood parasitism || C. Fungi and root of a higher plant | III. Mutualism || D. A cattle egret and a Cattle in a field | IV. Commensalism |
Q63mediummcqBiologyNEET 20232026
Given below are two statements:Statement I: Gause’s ‘Competitive Exclusion Principle’ states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually.Statement II: In general, carnivores are more adversely affected by competition than herbivores.In the light of the above statements, choose the correct answer:
Q64easymcqBiologyNEET 20172026
The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as:
Q65easymcqBiologyNEET 20172026
Mycorrhizae are the example of:
Q66easymcqBiologyNEET 20192026
The term ecosystem was coined by:
Q67mediummcqGeneral AwarenessSSC CGL2026
Identify a mobile source of food.
Q68mediummcqBotanyNEET 2024 R1@NUM: 1372026
Match List I with List II:
image
Q69easymcqBiologyNEET 20212026
In the exponential growth equation , represents:
Q70easymcqBiologyNEET 20172026
Which one of the following is related to Ex-situ conservation of threatened animals and plants?
Q71easymcqBiologyBiology
0% accuracy
More than 70% of world's freshwater is contained in:
Q72mediummcqBiologyBiology
0% accuracy
Prolonged liberal irrigation of agricultural fields is likely to create the problem of:
Q73mediummcqBiologyBiology
0% accuracy
Of the total incident solar radiation, the proportion of PAR (Photosynthetically Active Radiation) is:
Q74mediummcqBiologyBiology
0% accuracy
Large Woody Vines are more commonly found in:
Q75mediummcqBiologyBiology
0% accuracy
Which one of the following statements is correct for secondary succession?
Q76mediummcqBiologyBiology
0% accuracy
Which one of the following is categorised as a parasite in true sense?
Q77mediummcqBiologyBiology
0% accuracy
What type of human population is represented by the following pyramid?
Q78mediummcqBiologyBiology
0% accuracy
Which one of the following statements for pyramid of energy is incorrect?
Q79mediummcqBiologyBiology
0% accuracy
Mass of living matter at a trophic level in an area at any time is called:
Q80mediummcqBiologyBiology
0% accuracy
Which one of the following statements is correct?
Q81easymcqBiologyBiology
During sewage treatment, biogases are produced which include:
Q82easymcqBiologyBiology
Which one of the following has maximum genetic diversity in India?
Q83mediummcqBiologyBiology
A biologist studies a population of rats. Natality = 250, Mortality = 240, Immigration = 20, Emigration = 30. The net increase in population is:
Q84easymcqBiologyBiology
Which process of decomposition is correctly described?
Q85mediummcqBiologyBiology
Geometric representation of age structure is a characteristic of:
Q86easymcqBiologyBiology
Tiger is not a resident in which one of the following national parks?
Q87mediummcqBiologyBiology
A sedentary sea anemone gets attached to the shell lining of a hermit crab. This association is an example of:
Q88easymcqBiologyBiology
Global warming can be controlled by:
Q89mediummcqBiologyBiology
A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation:
image
Interpretations:
1) "B" is earlier pyramid and shows stabilised growth rate.
2) "B" is more recent showing that population is very young.
3) "A" is the earlier pyramid and no change has occurred in the growth rate.
4) "A" is more recent and shows slight reduction in the growth rate.
Q90easymcqBiologyBiology
The Air (Prevention and Control of Pollution) Act came into force in India in the year:
Q91easymcqBiologyBiology
Which of the following groups has the maximum number of species among the global biodiversity of plants and fungi?
Q92mediummcqBiologyBiology
Which one of the following is correct matching of a plant, its habit and the forest type where it normally occurs?

image
Q93mediummcqBiologyBiology
In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?
Q94mediummcqBiologyBiology
Steps taken by the Government of India to control air pollution include:
Q95mediummcqBiologyBiology
Kyoto Protocol was endorsed at:
Q96easymcqBiologyBiology
In a grazing food chain, the first trophic level is occupied by:
Q97mediummcqBiologyBiology
The correct sequence of plants in a hydrosere is:
Q98mediummcqBiologyBiology
The pioneer species in a hydrarch succession are:
Q99mediummcqBiologyBiology
Increase in the concentration of the toxicant at successive trophic levels is known as:
Q100mediummcqBiologyBiology
In a coal fired power plant electrostatic precipitators are installed to control emission of:
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Ecology questions are commonly asked in Biology, Botany, General Awareness, General Knowledge, General Knowledge and General Awareness. You can filter by exam using the links above.
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