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Ecology Questions

Practice 216 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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216
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99
Easy
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114
Medium
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3
Hard
Practice by Exam:Biology(169)General Awareness(8)Botany(7)Environment(4)Environmental Studies(4)General Science(4)General Studies(3)General Knowledge(3)

About Ecology — practice questions, PYQs & concepts

Ecology is a frequently-tested topic on Biology, General Awareness, Botany. ExamTest.live currently lists 216 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 (169), General Awareness (8), Botany (7), Environment (4) and Environmental Studies (4). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 99 easy Ecology 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 Ecology Questions(1–100 of 216)

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Q1easymcqGeneral AwarenessSSC Selection Post 2021 Matriculation Level2026
11% accuracy
Plant and animal communities living together in similar climatic conditions are called _____________.
Q2mediummcqGeneral ScienceSSC GD2026
0% accuracy
An ecosystem consists of:
Q3mediummcqGeneral AwarenessSSC GD2026
0% accuracy
Where did the Chipko movement first started in India?
Q4easymcqGeneral 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.
Q5easymcqChemistryNEET 20212026
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Which of the following statements is not correct?
Q6easymcqBiologyNEET (UG) 20172026
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Which one of the following is related to Ex-situ conservation of threatened animals and plants?
Q7mediummcqBiologyNEET 20192026
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Which of the following ecological pyramids is generally inverted?
Q8easymcqBiologyNEET 20192026
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Which of the following pairs of gases is mainly responsible for greenhouse effect?
Q9easymcqBiologyNEET (UG) 20172026
0% accuracy
Alexander Von Humboldt described for the first time:
Q10easymcqBiologyNEET 20192026
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Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?
Q11easymcqBiologyNEET 20192026
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Which one of the following is not a method in situ conservation of biodiversity?
Q12easymcqBiologyNEET 20192026
0% accuracy
Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for:
Q13easymcqBiologyNEET 20192026
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The Earth Summit held in Rio de Janeiro in 1992 was called:
Q14easymcqBiologyNEET (UG) 20172026
0% accuracy
The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as:
Q15mediummcqGeneral Knowledge and General AwarenessSSC CPO 20242026
0% accuracy
Which cycle comprises both sedimentary and gaseous cycles?
Q16easymcqBiologyNEET 20192026
0% accuracy
Which of the following is the most important cause for animals and plants being driven to extinction?
Q17mediummcqBiologyWBCS Prelims2026
0% accuracy
Darwin and Wallace were both strongly influenced by the book "An Essay on the Principle of Population" written by
Q18easymcqBiologyNEET 20192026
0% accuracy
Which of these following methods is the most suitable for disposal of nuclear waste?
Q19mediummcqBiologyCompetitive Exam2026
0% accuracy
According to the competitive exclusion principle, two species cannot continue to occupy the same
Q20mediummcqGeneral ScienceStaff Selection Commission2026
Which of the following statements about ‘Biological Magnification’ is FALSE?
Q21mediummcqGeneral Knowledge and General AwarenessSSC CPO 20242026
Which of the following options is correctly matched?
Q22mediummcqSciencePrepp2026
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’?
Q23mediummcqGeneral KnowledgeCompetitive Exam2026
Which among the following was designated the first RAMSAR site under the Ramsar Convention in India?
Q24mediummcqEnvironment and EcologyIndian Competitive Exams2026
Biotic potential can be defined as:
Q25mediummcqBotanyNEET 2024 R1@NUM: 1372026
Match List I with List II:
image
Q26easymcqBotanyNEET 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:
Q27mediummcqGeneral AwarenessPractice Paper2026
Which of the following environmental issues is primarily caused by the emission of greenhouse gases?
Q28easymcqEnvironmental StudiesUPTET 2021 Memory Based Paper 12026
Nitrogen-fixing bacteria are found in the roots of:
Q29mediummcqGeneral AwarenessSSC CGL2026
Identify a mobile source of food.
Q30easymcqGeneral ScienceCompetitive Exams2026
How are rivers and streams similar?
Q31mediummcqGeneral AwarenessSSC Combined Graduate Level Exam2026
___________ is the proper management of a natural resource to prevent its exploitation, destruction or degradation.
Q32mediummcqGeneral AwarenessCompetitive Exam2026
Which of the following organisms is considered a bioindicator of water pollution?
Q33hardmcqBotanyNEET 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.
Q34mediummcqGeography of IndiaCivil Services Exam2026
Name the state where the only wild Ass Sanctuary in India is located.
Q35easymcqBiologyNEET 20232026
The historic Convention on Biological Diversity, ‘The Earth Summit’ was held in Rio de Janeiro in the year:
Q36easymcqBiologyNEET 20232026
In the equation , represents:
Q37mediummcqBiologyNEET 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 |
Q38easymcqBiologyNEET 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?
Q39mediummcqBotanyNEET 2024 R1@NUM: 1322026
These are regarded as major causes of biodiversity loss:A. OverexploitationB. Co-extinctionC. MutationD. Habitat loss and fragmentationE. Migration
Q40easymcqBiologyNEET 20232026
Among ‘The Evil Quartet’ which one is considered the most important cause driving extinction of species?
Q41easymcqBiologyNEET 20222026
Habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction are causes for:
Q42easymcqBiologyNEET 20222026
In situ conservation refers to:
Q43easymcqBiologyNEET 20222026
Detritivores breakdown detritus into smaller particles. This process is called:
Q44easymcqBiologyNEET 20222026
Which one of the following will accelerate phosphorus cycle?
Q45easymcqBiologyNEET 20212026
In spite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?
Q46mediummcqIndian Polity & EconomyIndian Competitive Exams2026
What was the central theme of the Chipko Movement started by Sundarlal Bahuguna and others?
Q47mediummcqEnvironmentGeneral Knowledge Exam2026
Which of the following constitutes the largest ecosystem of the world?
Q48mediummcqGeneral KnowledgeUP Police Constable2026
What is a Greenhouse gas?
Q49easymcqBiologyNEET 20222026
Which one of the following statements cannot be connected to Predation?
Q50easymcqBiologyNEET 20222026
The device which can remove particulate matter present in the exhaust from a thermal power plant is:
Q51mediummcqEnvironmental StudiesGovernment Exams2026
Fill in the blank.
Salinization is ________.
Q52mediummcqGeneral StudiesCompetitive Exams2026
The landmark environmental book titled 'Silent Spring' was authored by:
Q53mediummcqEnvironmentCompetitive Exam Mock2026
'Coringa' mangrove is located in
Q54mediummcqBiologyNEET 2020 E12026
Which of the following is not an attribute of a population?
Q55mediummcqGeneral StudiesCompetitive Exams2026
Which of the following is the first National Park established in India?
Q56mediummcqEnvironmentCompetitive Exam Prep Portal2026
Biodiversity conservation within natural habitat is
Q57mediummcqGeneral StudiesCompetitive Exams2026
The preservation of the Lion-tailed Macaque and its habitat was the primary issue driving which of the following eco-movements?
Q58mediummcqEnvironmental StudiesGeneral Knowledge2026
'Entrophic' water body is a
Q59mediummcqGeographyGeneral Studies2026
The concept of 'Biosphere Reserve' was evolved by
Q60easymcqBiologyNEET 20212026
In the equation , represents:
Q61mediummcqBiologySSC CGL2026
Each step or level of a food chain forms a trophic level. Which of the following is at the first trophic level of the said food chain?
Q62mediummcqBiologySSC CGL2026
Plants which are grown under shade are known as:
Q63mediummcqGeneral AwarenessSSC CGL2026
K-selected species are characterised by:
Q64mediummcqBiologyCompetitive Exam Prep2026
Nekton (necton) are defined as:
Q65mediummcqGeneral KnowledgePrepp2026
Eutrophication can be defined as:
Q66mediummcqGeneral ScienceCompetitive Exam2026
According to Gause's Competitive Exclusion Principle, two distinct species competing for the exact same limiting resources cannot continue to occupy the same:
Q67easymcqBiologyNEET 20172026
Which one of the following statements is not valid for aerosols?
Q68mediummcqGeneral Science@NUM: 49SSC CGL2026
Which of the following is not considered as a part of the Abiotic Environment?
Q69easymcqBiologyNEET 20172026
Which of the following in sewage treatment removes suspended solids?
Q70easymcqBiologyNEET 20172026
Presence of plants arranged into well defined vertical layers depending on their height can be seen best in:
Q71mediummcqBotanyNEET 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?
Q72hardassertion/reasoningZoologyNEET 2024 R1@NUM: 1912026
Given below are two statements:
Q73easymcqBotanyNEET 2024 R1@NUM: 1052026
The list of endangered species was released by:
Q74mediummcqGeographyCivil Services Exam2026
East Kolkata wetlands have been declared as
Q75easymcqBiologyNEET 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) |
Q76mediummcqBiologyNEET 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:
Q77easymcqBiologyNEET 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 |
Q78mediummcqEnvironmentGeneral Science2026
An 'Eutrophic' water body is a
Q79easymcqBiologyNEET 20222026
Which of the following is not a method of ex situ conservation?
Q80mediummcqBiologyNEET 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:
Q81mediummcqBiologyNEET 20222026
If ‘ ’ Drosophila in a laboratory population of ‘ ’ died during a week, the death rate in the population is ____ individuals per Drosophila per week.
Q82mediummcqEnvironmental StudiesCompetitive Exams2026
Biodiversity conservation within the natural habitat is called:
Q83mediummcqBiologyNEET 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:
Q84easymcqBiologyNEET 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:
Q85easymcqBiologyNEET 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?
Q86easymcqBotanyNEET 2024 R1@NUM: 1162026
The equation of Verhulst-Pearl logistic growth is . From this equation, indicates:
Q87easymcqBiologyNEET 20212026
Amensalism can be represented as:
Q88easymcqBiologyNEET 20212026
In the exponential growth equation , represents:
Q89mediummcqGeographyCompetitive Exam Practice Paper2026
East Kolkata wetlands have been declared as a:
Q90easymcqBiologyNEET 20172026
Mycorrhizae are the example of:
Q91easymcqBiologyNEET 20172026
Which one of the following is related to Ex-situ conservation of threatened animals and plants?
Q92easymcqBiologyNEET 20172026
The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as:
Q93easymcqBiologyNEET 20172026
Which ecosystem has the maximum biomass?
Q94easymcqBiologyNEET 20192026
The term ecosystem was coined by:
Q95mediummcqCurrent AffairsCompetitive Exam2026
Which of the following is celebrated as the very first beach in Asia to receive the prestigious global 'Blue Flag' eco-certification?
Q96easymcqBiologyNEET 20212026
The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as:
Q97mediummcqBiologyCompetitive Exam Practice Paper2026
Nekton are:
Q98mediummcqEnvironmental ScienceCompetitive Exam2026
Profuse growth of aquatic vegetation that often changes the colour of water body is known as:
Q99hardmcqBiologyNEET 20172026
Asymptote in a logistic growth curve is obtained when:
Q100easymcqBiologyBiology
0% accuracy
More than 70% of world's freshwater is contained in:
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Which exams include Ecology questions?▼
Ecology questions are commonly asked in Biology, General Awareness, Botany, Environment, Environmental Studies. 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.