Environment & Biodiversity MCQs
Environment, Ecology & Biodiversity Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations.
41. Which of the following human activity has influenced global warming?
[A] By causing changing in gravitational force
[B] By planting more trees
[C] By changing the radiative balance governing the Earth
[D] By protecting environment
Show Answer
Correct Answer: C [By changing the radiative balance governing the Earth]
Notes:
Different Human activities ranging from the burning of fossil fuels to cutting of trees has influenced global surface temperature by changing the radiative balance governing the Earth on various timescales.
42. Which of the following is the main reason for the melting of ice sheets?
[A] Increase in the oxygen content
[B] Global warming
[C] Decrease in the Carbon dioxide content
[D] Noise pollution
Show Answer
Correct Answer: B [Global warming]
Notes:
Global warming is defined as the average increase of Earth’s temperature due to natural as well as human induced reasons. Global warming increases the average temperature of the Earth resulting in the melting of ice caps.
43. Which of the following processes is functional in removing carbon dioxide from the atmosphere?
[A] Volcanism
[B] Deforestation
[C] Burning of Fossil Fuels
[D] Photosynthesis
Show Answer
Correct Answer: D [Photosynthesis]
Notes:
Photosynthesis is the process by virtue of which the green plants and certain other organisms transform light energy into chemical energy. During the process of photosynthesis, plants take carbon dioxide from the atmosphere hence reducing the concentration of carbon dioxide in the atmosphere.
44. Emissions Gap Report is published by which of the following organisation?
[A] WMO
[B] UNEP
[C] IPCC
[D] UNFCCC
Show Answer
Correct Answer: B [UNEP]
Notes:
The Emissions Gap Report is released by the United Nations Environment Programme also called as UNEP. According to the Emissions Gap Report, India is the fourth-largest emitter of Green House Gases (GHGs).
45. Which among the following is an Abiotic component of environment?
[A] Water
[B] Parasites
[C] Green plants
[D] Non-Green plants
Show Answer
Correct Answer: A [Water]
Notes:
In ecology, abiotic components are non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems. Abiotic components include water, light, radiation, temperature, humidity, atmosphere, and soil.
46. The primary producer in an ecosystem are ____:
[A] Women
[B] Men
[C] Plants
[D] Bacteria
Show Answer
Correct Answer: C [Plants]
Notes:
Primary producers are the organisms in an ecosystem that produce biomass from inorganic compounds (autotrophs). In almost all cases, these are photosynthetically active organisms (plants, cyanobacteria and a number of other unicellular organism.
47. Absence of fish along a river indicates _____:
[A] Zone of active decomposition
[B] Zone of degradation
[C] Zone of recovery
[D] All zones of pollution
Show Answer
Correct Answer: B [Zone of degradation]
Notes:
Absence of fish along a river indicates zone of degradation. This zone is found for a certain length just below the point where sewage is discharged into the river-stream. This zone is characterised by water becoming dark and turbine with formation of sludge deposits at the bottom. D.O is reduced to about 40% of the saturated value.
48. Kyoto Protocol, an agreement signed by various countries, is associated with ______:
[A] International Trade
[B] Building common food stock to save human beings from any natural disaster
[C] Clean Environment and Climate Change
[D] Deep Sea Oil and Mineral Exploration
Show Answer
Correct Answer: C [Clean Environment and Climate Change]
Notes:
The Kyoto Protocol was an international treaty which extended the 1992 United Nations Framework Convention on Climate Change that commits state parties to reduce greenhouse gas emissions, based on the scientific consensus that global warming is occurring and that human-made CO2 emissions are driving it.
49. What is green house effect?
[A] Turning of house green because of algae cover
[B] Warming of earth because of trapping of radiations by the earths atmosphere
[C] Turning of house green because of green component of white light
[D] None of the above
Show Answer
Correct Answer: B [Warming of earth because of trapping of radiations by the earths atmosphere]
Notes:
The greenhouse effect is the process by which radiation from a planet’s atmosphere warms the planet’s surface to a temperature above what it would be without its atmosphere. It caused by the presence of water vapour, carbon dioxide, methane, and certain other gases in the air.
50. Which of the following is correct order with respect to amount present in air?
[A] Nitrogen > carbon dioxide > oxygen
[B] Nitrogen > oxygen > carbon dioxide
[C] Oxygen > nitogen > carbon dioxide
[D] Carbon dioxide > nitrogen > oxygen
Show Answer
Correct Answer: B [Nitrogen > oxygen > carbon dioxide]
Notes:
By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% Argon, 0.04% carbon dioxide and small amount of other gases. Air also contains variable amount of water vapour, on average around 1% at sealevel and 0.4% over the entire atmosphere.
