Epiphytes that are growing on a mango branch is an example of which of the following?
Ecology and Environment
Every question from past board papers on Ecology and Environment, newest paper first. Open any question for its full worked answer.
NEET UG 2025 question paper (official, booklet 45)
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Which one of the following is an example of ex-situ conservation?
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Given below are two statements :
Statement I : The primary source of energy in an ecosystem is solar energy.
Statement II : The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).
In the light of the above statements, choose the most appropriate answer from the options given below :
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Who is known as the father of Ecology in India?
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Which of the following is the unit of productivity of an Ecosystem?
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Given below are two statements :
Statement I : Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it.
Statement II : Fig wasp and fig tree exhibit mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp.
In the light of the above statements, choose the most appropriate answer from the options given below :
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Match List I with List II :
List I: A. The Evil Quartet B. Ex situ conservation C. Lantana camara D. Dodo
List II: I. Cryopreservation II. Alien species invasion III. Causes of biodiversity losses IV. Extinction
Choose the correct matches.
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Given below are two statements :
Statement I : In ecosystem, there is unidirectional flow of energy of sun from producers to consumers.
Statement II : Ecosystems are exempted from 2nd law of thermodynamics.
In the light of the above statements, choose the most appropriate answer from the options given below :
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Which one of the following equations represents the Verhulst-Pearl Logistic Growth of population?
NEET UG 2024 question paper (official, booklet S6)
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The equation of Verhulst-Pearl logistic growth is
\(\frac{dN}{dt} = rN\left[\frac{K-N}{K}\right]\).
From this equation, \(K\) indicates:
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These are regarded as major causes of biodiversity loss:
A. Over exploitation
B. Co-extinction
C. Mutation
D. Habitat loss and fragmentation
E. Migration
Choose the correct option:
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The type of conservation in which the threatened species are taken out from their natural habitat and placed in special setting where they can be protected and given special care is called;
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List of endangered species was released by-
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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.
Choose the correct answer from the options given below:
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Match List I with List II
List I: A. Robert May; B. Alexander von Humboldt; C. Paul Ehrlich; D. David Tilman
List II: I. Species-Area relationship; II. Long term ecosystem experiment using out door plots; III. Global species diversity at about 7 million; IV. Rivet popper hypothesis
Choose the correct answer from the options given below:
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In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is
\(100x\,(kcal\,m^{-2})\,yr^{-1}\), what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
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Given below are two statements :
Statement I : Gause's competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely.
Statement II : According to Gause's principle, during competition, the inferior will be eliminated. This may be true if resources are limiting.
In the light of the above statements, choose the correct answer from the options given below :
NEET UG 2023 question paper (official, booklet G6)
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The thickness of ozone in a column of air in the atmosphere is measured in terms of :
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Among 'The Evil Quartet', which one is considered the most important cause driving extinction of species?
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In the equation
\(GPP - R = NPP\)
GPP is Gross Primary Productivity
NPP is Net Primary Productivity
R here is ______.
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The historic Convention on Biological Diversity, 'The Earth Summit' was held in Rio de Janeiro in the year :
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Identify the correct statements :
A. Detrivores 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 :
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Match List I with List II :
List I (Interaction) | List II (Species A and B)
A. Mutualism | I. +(A), O(B)
B. Commensalism | II. -(A), O(B)
C. Amensalism | III. +(A), -(B)
D. Parasitism | IV. +(A), +(B)
Choose the correct answer from the options given below :
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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 from the options given below :
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Match List I with List II.
List I (Interacting species): A. A Leopard and a Lion in a forest/grassland; B. A Cuckoo laying egg in a Crow's nest; C. Fungi and root of a higher plant in Mycorrtizae; D. A cattle egret and a Cattle in a field
List II (Name of Interaction): I. Competition; II. Brood parasitism; III. Mutualism; IV. Commensalism
Choose the correct answer from the options given below:
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Given below are two statements:
Statement I: Electrostatic precipitator is most widely used in thermal power plant.
Statement II: Electrostatic precipitator in thermal power plant removes ionising radiations
In the light of the above statements, choose the most appropriate answer from the options given below:
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Which of the following statements is correct?
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Match List I with List II.
List I: A. Logistic growth; B. Exponential growth; C. Expanding age pyramid; D. Stable age pyramid
List II: I. Unlimited resource availability condition; II. Limited resource availability condition; III. The percent individuals of pre-reproductive age is largest followed by reproductive and post reproductive age groups; IV. The percent individuals of pre-reproductives and reproductive age group are same
Choose the correct answer from the options given below:
NEET UG 2022 question paper (official, booklet R6)
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The device which can remove particulate matter present in the exhaust from a thermal power plant is :
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Which of the following is not a method of ex situ conservation ?
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Which one of the following statements cannot be connected to Predation ?
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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 :
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Habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction are causes for :
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Which one of the following will accelerate phosphorus cycle ?
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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 ?
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While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (-) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one species and (-) for another species involved in the interaction ?
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Detritivores breakdown detritus into smaller particles. This process is called :
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If '8' Drosophila in a laboratory population of '80' died during a week, the death rate in the population is ______ individuals per Drosophila per week.
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In-situ conservation refers to :
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Given below are two statements :
Statement I :
In a scrubber the exhaust from the thermal plant is passed through the electric wires to charge the dust particles.
Statement II :
Particulate matter (PM 2.5) can not 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 :
NEET UG 2021 question paper (official, booklet M4)
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In the equation GPP\(-\)R=NPP
R represents :
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Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival ?
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Amensalism can be represented as :
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Which of the following statements is not correct ?
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The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as :
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In the exponential growth equation \(N_t=N_0e^{rt}\), e represents :
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Dobson units are used to measure thickness of :
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Match List - I with List - II.
List - I / List - II
(a) Allen's Rule (i) Kangaroo rat
(b) Physiological adaptation (ii) Desert lizard
(c) Behavioural adaptation (iii) Marine fish at depth
(d) Biochemical adaptation (iv) Polar seal
Choose the correct answer from the options given below.
NEET UG 2020 question paper (official, booklet E1)
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Which of the following is not an attribute of a population ?
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According to Robert May, the global species diversity is about :
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Which of the following regions of the globe exhibits highest species diversity ?
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Montreal protocol was signed in 1987 for control of :
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Match the trophic levels with their correct species examples in grassland ecosystem.
(a) Fourth trophic level (i) Crow
(b) Second trophic level (ii) Vulture
(c) First trophic level (iii) Rabbit
(d) Third trophic level (iv) Grass
Select the correct option :
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In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct ?
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Snow-blindness in Antarctic region is due to :
NEET UG 2019 question paper (official, booklet P1)
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The Earth Summit held in Rio de Janeiro in 1992 was called :
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Which of the following is the most important cause for animals and plants being driven to extinction ?
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Which of the following pairs of gases is mainly responsible for green house effect ?
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Which one of the following is not a method of *in situ* conservation of biodiversity ?
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Which of the following ecological pyramids is generally inverted ?
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Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere ?
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Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for :
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Which of these following methods is the most suitable for disposal of nuclear waste ?
NEET UG 2018 question paper (official, booklet EE)
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Niche is
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Which of the following is a secondary pollutant ?
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World Ozone Day is celebrated on
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Natality refers to
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In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen ?
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What type of ecological pyramid would be obtained with the following data ?
Secondary consumer : 120 g
Primary consumer : 60 g
Primary producer : 10 g
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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 ?
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All of the following are included in 'Ex-situ conservation' except
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Match the items given in Column I with those in Column II and select the correct option given below :
Column I | Column II
a. Eutrophication | i. UV-B radiation
b. Sanitary landfill | ii. Deforestation
c. Snow blindness | iii. Nutrient enrichment
d. Jhum cultivation | iv. Waste disposal
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In a growing population of a country,
NEET UG 2017 question paper (official, booklet B)
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Alexander Von Humbolt described for the first time :
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Which ecosystem has the maximum biomass ?
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Mycorrhizae are the example of :
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The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as :
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Which one of the following statements is not valid for aerosols ?
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Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :
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Which one of the following is related to Ex-situ conservation of threatened animals and plants ?
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Plants which produce characteristic pneumatophores and show vivipary belong to :
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Asymptote in a logistic growth curve is obtained when :
NEET UG 2016 Phase 1 question paper (official, booklet A)
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Gause's principle of competitive exclusion states that :
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Which is the National Aquatic Animal of India ?
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Which of the following is the most important cause of animals and plants being driven to extinction ?
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Which one of the following is a characteristic feature of cropland ecosystem ?
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Joint Forest Management Concept was introduced in India during :
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The term ecosystem was coined by :
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When does the growth rate of a population following the logistic model equal zero ? The logistic model is given as dN/dt = rN(1-N/K) :
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Which of the following would appear as the pioneer organisms on bare rocks ?
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Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers :
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A river with an inflow of domestic sewage rich in organic waste may result in :
NEET UG 2016 Phase 2 question paper (official, booklet ZZ)
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How many hot spots of biodiversity in the world have been identified till date by Norman Myers?
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The primary producers of the deep-sea hydrothermal vent ecosystem are
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Which of the following is correct for r-selected species?
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If '+' sign is assigned to beneficial interaction, '–' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '–' refers to
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Which of the following is correctly matched?
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Red List contains data or information on
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Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from
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The principle of competitive exclusion was stated by
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Which of the following National Parks is home to the famous musk deer or hangul?
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A lake which is rich in organic waste may result in
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The highest DDT concentration in aquatic food chain shall occur in