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Delhi University Entrance Test (DUET) 2020 Previous Year Question Paper With Answer Key

This post was last modified on 27 December 2020

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DUET Last 10 Years 2011-2021 Question Papers With Answer Key || Delhi University Entrance Test conducted by the NTA

Firstranker's choice www.FirstRanker.com

Topic:- ES MSC S2N

DU MSC Environment

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Which of the following is thought to be a possible consequence of rising CO2 levels?

[Question ID = 10618]
1. Increased breakdown of atmospheric ozone [Option ID - 42466]
2. Increased vegetative productivity [Option ID - 42467]
3. Falling global temperature [Option ID - 42468]
4. More rapid warming at the equator than at the poles [Option ID - 42469]
Correct Answer :-
- Increased vegetative productivity [Option ID - 42467]
When climbing a mountain, we can observe transitions in biological communities that are analogous to the changes:
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[Question ID = 10619]
1. at different depths in the ocean [Option ID - 42470]
2. in a community through different seasons [Option ID - 42471]
3. in an ecosystem as it evolves over time [Option ID - 42472]
4. in biomes at different latitudes [Option ID - 42473]
Correct Answer:-
- in biomes at different latitudes [Option ID 42473]
What do diversity indices such as the Shannon Index take into account?

[Question ID = 10620]
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1. Alpha diversity and beta diversity [Option ID - 42474]
2. Evenness and beta diversity [Option ID - 42475]
3. Species richness and evenness [Option ID - 42476]
4. Species richness and beta diversity [Option ID - 42477]
Correct Answer :-
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- Species richness and evenness [Option ID - 42476]
The theory that primary productivity is limited by whichever necessary metabolic requirement is present in the least supply relative to demand is known as:

[Question ID = 10621]
1. Law of minimum metabolic requirement [Option ID - 42478]
2. Minimum metabolic requirement [Option ID - 42479]
3. Principle of limiting factors [Option ID - 42480]
4. Theory of the minimum metabolic requirement [Option ID - 42481]
Correct Answer :-
- Principle of limiting factors [Option ID - 42480]
A variable that is affected by and responds to changes in the manipulated variable is called:

[Question ID = 10622]
1. controlled variable [Option ID - 42482]
2. dependent variable [Option ID - 42483]
3. independent variable [Option ID - 42484]
4. random variable [Option ID - 42485]
Correct Answer :-
- dependent variable (Option ID - 42483]

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In a frequency distribution graph, frequencies are presented on the ________ and the scores (categories) are listed on the ________.

[Question ID = 10623]
1. Class interval/horizontal line [Option ID - 42486]
2. Horizontal line/vertical line [Option ID - 42487]
3. X axis /Y axis [Option ID - 42488]
4. Y axis/X axis [Option ID - 42489]
Correct Answer:-
- Y axis/X axis [Option ID - 42489]
Which of the following international conventions restricts international trade in endangered species?
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[Question ID = 10624]
1. CBD [Option ID - 42490]
2. CITES [Option ID - 42491]
Correct Answer :-
- CITES [Option ID - 42491]
An ecological footprint is:

[Question ID = 10625]
1. a measure of the earth's biological capacity [Option ID - 42494]
2. amount of wilderness available on earth [Option ID - 42495]
3. amount of biologically productive land and water a person uses [Option ID - 42496]
4. a measure of a person's contribution to creating a sustainable environment [Option ID - 42497]
Correct Answer:-
- amount of biologically productive land and water a person uses [Option ID - 42496]

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What is the difference between an endangered species and a threatened species?

[Question ID = 10626]
1. A threatened species may still be abundant now but likely to become endangered in the near future [Option ID - 42498]
2. A threatened species is at the brink of extinction now and an endangered species is likely to be at the brink in the near future [Option ID - 42499]
3. A threatened species is becoming endangered specifically because of human activities [Option ID - 42500]
4. There is no difference. The two terms are interchangeable [Option ID - 42501]
Correct Answer :-
- A threatened species may still be abundant now but likely to become endangered in the near future [Option ID - 42498]
When a doctor uses a stethoscope to count your pulse rate, she is gathering information by using the ________:
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[Question ID = 10627]
1. empirical method [Option ID - 42502]
2. method of intuition [Option ID - 42503]
3. method of authority [Option ID - 42504]
4. rational method [Option ID 42505]
Correct Answer :-
- empirical method [Option ID - 42502]
The maximum per capita rate of increase achieved by a species under ideal environmental conditions is called the:

[Question ID = 10628]
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1. inherent rate of increase [Option ID - 42506]
2. inherent growth rate [Option ID - 42507]
3. intrinsic growth rate [Option ID - 42508]
4. intrinsic rate of increase [Option ID - 42509]
Correct Answer:-
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- intrinsic rate of increase [Option ID - 42509]
What is the Lotka-Volterra competition model based on?

[Question ID = 10629]
1. Exponential population growth equation [Option ID - 42510]
2. Life table equation [Option ID - 42511]
3. Logistic population growth equation [Option ID - 42512]
4. Realized per capita growth rate equation [Option ID - 42513]
Correct Answer :-
- Logistic population growth equation [Option ID - 42512]
The best measure of central tendency for an extremely skewed distribution of scores would be ________.

[Question ID = 10630]
1. cannot be determined [Option ID - 42514]
2. the mean [Option ID - 42515]
3. the median [Option ID - 42516]
4. the mode [Option ID - 42517]
Correct Answer :-
- the median [Option ID - 42516]

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Trade winds are the prevailing pattern of surface winds. The factors determining patterns of these winds are:

[Question ID = 10631]
1. gravitational field of Planet Earth [Option ID - 42518]
2. rotational pattern of Earth [Option ID - 42519]
3. uneven surface temperature [Option ID - 42520]
4. Coriolis effect [Option ID - 42521]
Correct Answer :-
- uneven surface temperature [Option ID - 42520]
Which of the following shows the correct order of soil texture from larger to smaller diameters?
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[Question ID = 10632]
1. Gravel, sand, clay, and silt [Option ID - 42522]
2. Gravel, sand, silt, and clay [Option ID - 42523]
3. Gravel, silt, sand, and clay [Option ID - 42524]
4. Sand, gravel, silt, and clay [Option ID - 42525]
Correct Answer :-
- Gravel, sand, silt, and clay [Option ID - 42523]
All members in which of the following groups have the greatest number of characteristics in common?

[Question ID = 10633]
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1. Class [Option ID - 42526]
2. Genus [Option ID - 42527]
3. Phylum [Option ID - 42528]
4. Species [Option ID - 42529]
Correct Answer:-
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- Species [Option ID - 42529]
What does the system of binomial nomenclature that assigns a unique name to each organism describe?

[Question ID = 10634]
1. Family and species [Option ID - 42530]
2. Genus and family [Option ID - 42531]
3. Order and family [Option ID - 42532]
4. Species and genus [Option ID - 42533]
Correct Answer :-
- Species and genus [Option ID - 42533]
Wings of birds and insects have the same function but they do not share the same evolutionary origin. Bird and insect wings are considered to be which of the following?

[Question ID = 10635]
1. Analogous [Option ID - 42534]
2. Homologous [Option ID - 42535]
3. Phylogenetic [Option ID - 42536]
4. Taxonomic [Option ID - 42537]
Correct Answer:-
- Analogous [Option ID - 42534]

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Which of the following animal phyla is most likely to leave fossils?

[Question ID = 10636]
1. Annelida [Option ID - 42538]
2. Cnidaria [Option ID - 42539]
3. Chordata [Option ID - 42540]
4. Nematoda [Option ID - 42541]
Correct Answer:-
- Chordata [Option ID - 42540]
Which of the following systems is active under stress?
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[Question ID = 10637]
1. Complete autonomic nervous system [Option ID - 42542]
2. Parasympathetic nervous system [Option ID - 42543]
3. Sympathetic nervous system [Option ID - 42544]
4. Somatic nervous system [Option ID - 42545]
Correct Answer :-
- Sympathetic nervous system [Option ID - 42544]
Migration of fish from fresh water to marine water is known as:

[Question ID = 10638]
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1. Anadromous [Option ID - 42546]
2. Catadromous [Option ID - 42547]
3. Amphidromous [Option ID - 42548]
4. Potamodromous [Option ID 42549]
Correct Answer:-
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- Catadromous [Option ID - 42548]
How does pupa survive through its life cycle?

[Question ID = 10639]
1. Caudal flaps [Option ID - 42550]
2. Feeding through the water [Option ID - 42551]
3. Feeding through the proboscis [Option ID - 42552]
4. Through food accumulated in the larval stage [Option ID - 42553]
Correct Answer :-
- Through food accumulated in the larval stage [Option ID - 42553]
Melatonin is synthesized from which of the following?

[Question ID = 10640]
1. Histamine [Option ID - 42554]
2. Melanine [Option ID - 42555]
3. Tyrosine [Option ID - 42556]
4. Tryptophan [Option ID - 42557]
Correct Answer :-
- Tryptophan [Option ID - 42557]

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The slogan 'Taking Action for living planet' was used by:

[Question ID = 10641]
1. UNESCO [Option ID - 42558]
2. United Nations Environment Programme [Option ID - 42559]
3. World bank [Option ID - 42560]
4. World Wide Fund for Nature [Option ID - 42561]
Correct Answer :-
- World Wide Fund for Nature [Option ID - 42561]
The Guinness Book of World Records has declared ________ as the largest river island in the world.
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[Question ID = 10642]
1. Bananal [Option ID - 42562]
2. Marajo [Option ID - 42563]
3. Majuli [Option ID - 42564]
4. Nongkhnum [Option ID - 42565]
Correct Answer :-
- Majuli [Option ID - 42564]
In an experiment, we manipulate a/an ________ variable to observe an effect on a/an ________ variable.

[Question ID = 10643]
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1. dependent, another dependent [Option ID - 42566]
2. dependent, independent [Option ID - 42567]
3. independent, another independent (Option ID - 42568]
4. independent, dependent [Option ID - 42569]
Correct Answer :-
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- independent, dependent [Option ID - 42569]
Rooted plants are found only in the ________ zone of a lake.

[Question ID = 10644]
1. limnetic [Option ID - 42570]
2. littoral [Option ID - 42571]
3. nektonic [Option ID - 42572]
4. pelagic [Option ID - 42573]
Correct Answer :-
- littoral [Option ID - 42571]
[Question ID = 10645]
1. Everything affects everything else [Option ID - 42574]
2. Humans have only one environment [Option ID - 42575]
3. The environment is a closed system [Option ID - 42576]
4. All of these [Option ID - 42577]
Correct Answer :-
- Everything affects everything else [Option ID - 42574]
Exponential growth is characterized by which of the following?
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[Question ID = 10646]
1. 1) Growth at a constant rate [Option ID - 42578]
2. 2) Growth at constant N [Option ID - 42579]
3. 3) Both (1) and (2) [Option ID - 42580]
4. 4) None of these [Option ID - 42581]
Correct Answer :-
- 1) Growth at a constant rate [Option ID - 42578]
In terms of a population, what does "age structure" refer to?

[Question ID = 10647]
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1. Per capita production of goods and services by age [Option ID - 42582]
2. The proportion of the population in different age groups [Option ID - 42583]
3. The rate of population growth [Option ID - 42584]
4. All of these [Option ID - 42585]
Correct Answer :-
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- The proportion of the population in different age groups [Option ID - 42583]
The processes responsible for formation and change of Earth's materials are collectively known as the:

[Question ID = 10648]
1. Atmospheric cycle [Option ID - 42586]
2. Continental cycle [Option ID - 42587]
3. Geologic cycle [Option ID - 42588]
4. Hydrologic cycle [Option ID - 42589]
Correct Answer :-
- Geologic cycle [Option ID - 42588]
In the context of biochemical cycles, what does "flux" refer to?

[Question ID = 10649]
1. A state of disturbance from natural conditions [Option ID - 42590]
2. Loss of matter or energy from the Earth system [Option ID - 42591]
3. The loss of water vapour through the pores of plants [Option ID - 42592]
4. The transfer of material or energy from one reservoir to another [Option ID - 42593]
Correct Answer :-
- The transfer of material or energy from one reservoir to another [Option ID - 42593]

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Which short-term cycle affects carbon dioxide and oxygen, and which long-term cycle affects carbon dioxide and oxygen?

[Question ID = 10650]
1. Carbonate-silicate cycle [Option ID - 42594]
2. Carbon-phosphate cycle [Option ID - 42595]
3. Carbon-silicate cycle [Option ID - 42596]
4. Carbon-sulphate cycle [Option ID - 42597]
Correct Answer :-
- Carbonate-silicate cycle [Option ID - 42594]
What are the two fundamental processes that must be studied to understand ecosystem structure and functioning?
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[Question ID = 10651]
1. Flow of energy and cycling of chemical elements [Option ID - 42598]
2. Photosynthesis and respiration [Option ID - 42599]
3. Waste decomposition and cycling of energy [Option ID - 42600]
4. All of these [Option ID - 42601]
Correct Answer :-
- Flow of energy and cycling of chemical elements [Option ID - 42598]
What are the species that are most abundant or otherwise most important in an ecological community called?

[Question ID = 10652]
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1. Common [Option ID - 42602]
2. Dominant [Option ID - 42603]
3. Pioneer [Option ID - 42604]
4. Predominant [Option ID - 42605]
Correct Answer :-
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- Dominant [Option ID - 42603]
Which of the following processes lead to biological evolution?

[Question ID = 10653]
1. Migration and genetic drift [Option ID - 42606]
2. Mutation [Option ID - 42607]
3. Natural selection [Option ID - 42608]
4. All of these [Option ID - 42609]
Correct Answer :-
- All of these [Option ID - 42609]
What are the dominant plants in a fresh water biome called?

[Question ID = 10654]
1. Eichhornia sp. [Option ID - 42610]
2. Phytoplankton [Option ID - 42611]
3. Spirogryra [Option ID - 42612]
4. Vallisneria sp. [Option ID - 42613]
Correct Answer :-
- Vallisneria sp. [Option ID - 42613]

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In general what percentage of energy received by green plants from the sun is converted into new plant tissues?

[Question ID = 10655]
1. less than 5 [Option ID - 42614]
2. less than 10 [Option ID - 42615]
3. less than 15 [Option ID - 42616]
4. less than 25 [Option ID - 42617]
Correct Answer :-
- less than 5 [Option ID - 42614]
What are the main components of Integrated Pest Management (IPM)?
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[Question ID = 10656]
1. Biological control [Option ID - 42618]
2. Land culture [Option ID - 42619]
3. Chemical control [Option ID - 42620]
4. All of these [Option ID - 42621]
Correct Answer :-
- All of these [Option ID - 42621]
The dose of a toxin at which a specified percentage of test population dies is known as:

[Question ID = 10657]
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1. control [Option ID - 42622]
2. lethal dose [Option ID - 42623]
3. placebo dose [Option ID - 42624]
4. toxic dose [Option ID - 42625]
Correct Answer :-
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- lethal dose [Option ID - 42623]
Why is natural gas considered a better fossil fuel than oil?

[Question ID = 10658]
1. Burning natural gas is cleaner than burning oil [Option ID - 42626]
2. Gas commands a higher price than oil [Option ID - 42627]
3. Gas is easier to transport [Option ID - 42628]
4. Gas is a renewable resource [Option ID - 42629]
Correct Answer :-
- Burning natural gas is cleaner than burning oil [Option ID - 42626]
Direct conversion of electricity using sunlight without an intermediate fluid medium is accomplished by which of the following?

[Question ID = 10659]
1. Li-ion battery [Option ID - 42630]
2. Photochemical cell [Option ID - 42631]
3. Photovoltaic cell [Option ID - 42632]
4. All of these [Option ID - 42633]
Correct Answer :-
- Photovoltaic cell [Option ID - 42632]

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Long-term plans expect to finish the clean-up work at Chernobyl by which of the following year?

[Question ID = 10660]
1. 2016 [Option ID - 42634]
2. 2026 [Option ID - 42635]
3. 2036 [Option ID - 42636]
4. 2065 [Option ID - 42637]
Correct Answer :-
- 2065 [Option ID - 42637]
What is saltwater intrusion?
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[Question ID = 10661]
1. Excessive withdrawal of groundwater [Option ID - 42638]
2. Invasion of saltwater into freshwater supplies [Option ID - 42639]
3. Natural outflow of water from a natural spring [Option ID - 42640]
4. All of these [Option ID - 42641]
Correct Answer :-
- Invasion of saltwater into freshwater supplies [Option ID - 42639]
Which of the following compounds absorb earthshine in the wavelengths that typically pass through the atmospheric window?

[Question ID = 10662]
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1. Carbon dioxide [Option ID - 42642]
2. Chloroflourocarbons [Option ID - 42643]
3. Ozone [Option ID - 42644]
4. Water vapour [Option ID - 42645]
Correct Answer:-
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- Chloroflourocarbons [Option ID - 42643]
About what percentage of the solar energy is reflected back by ice?

[Question ID = 10663]
1. 10-25% [Option ID - 42646]
2. 30-45% [Option ID - 42647]
3. 60-75% [Option ID - 42648]
4. 80-95% [Option ID - 42649]
Correct Answer :-
- 80-95% [Option ID - 42649]
Sulphur dioxide emissions are predominantly caused by which of the following?

[Question ID = 10664]
1. 1) Burning coal [Option ID - 42650]
2. 2) Automobile emissions [Option ID - 42651]
3. 3) Both (1) and (2) [Option ID - 42652]
4. 4) Photochemical smog [Option ID - 42653]
Correct Answer :-
- 3) Both (1) and (2) [Option ID - 42652]

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This download link is referred from the post: DUET Last 10 Years 2011-2021 Question Papers With Answer Key || Delhi University Entrance Test conducted by the NTA

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This post was last modified on 27 December 2020

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