MCQs
Total Questions : 60
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Answer: Option D. -> Nuclear energy
Answer: (d)
Energy generated by using wind, tides, solar, geothermal heat, and biomass including farm and animal waste as well as human excreta is known as non-conventional energy. All these sources are renewable or inexhaustible and do not cause environmental pollution. Moreover, they do not require heavy expenditure.
Nuclear energy usually means the part of the energy of an atomic nucleus, which can be released by fusion or fission or radioactive decay.
Answer: (d)
Energy generated by using wind, tides, solar, geothermal heat, and biomass including farm and animal waste as well as human excreta is known as non-conventional energy. All these sources are renewable or inexhaustible and do not cause environmental pollution. Moreover, they do not require heavy expenditure.
Nuclear energy usually means the part of the energy of an atomic nucleus, which can be released by fusion or fission or radioactive decay.
Answer: Option A. -> Deciduous forest
Answer: (a)
Deciduous means “falling off at maturity” or “tending to fall off”, and is typically used in reference to trees or shrubs that lose their leaves seasonally, and to the shedding of other plant structures such as petals after flowering or fruit when ripe.
In a more general sense, deciduous means the dropping of a part that is no longer needed or falling away after its purpose is finished.
Answer: (a)
Deciduous means “falling off at maturity” or “tending to fall off”, and is typically used in reference to trees or shrubs that lose their leaves seasonally, and to the shedding of other plant structures such as petals after flowering or fruit when ripe.
In a more general sense, deciduous means the dropping of a part that is no longer needed or falling away after its purpose is finished.
Answer: Option A. -> Mangroves, grasslands, lakes, oceans
Answer: (a)
Productivity is the rate of organic matter or biomass production. The average ocean productivity is about 50 grams of carbon per square meter per year; while, the average land productivity is 160 grams of carbon per square meter per year.
Salt marshes and mangroves have one of the highest productivity of 3300-6000 grams of carbon per square meter per year.
So the correct sequence of the ecosystem in the order of decreasing productivity is:
Mangroves > Grasslands > Lakes > Oceans.
Answer: (a)
Productivity is the rate of organic matter or biomass production. The average ocean productivity is about 50 grams of carbon per square meter per year; while, the average land productivity is 160 grams of carbon per square meter per year.
Salt marshes and mangroves have one of the highest productivity of 3300-6000 grams of carbon per square meter per year.
So the correct sequence of the ecosystem in the order of decreasing productivity is:
Mangroves > Grasslands > Lakes > Oceans.
Answer: Option C. -> Trapping of solar energy due to atmospheric carbon dioxide
Answer: (c)
The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases such as Carbon dioxide, and is re-radiated in all directions.
Since part of this re-radiation is back towards the surface and the lower atmosphere, it results in an elevation of the average surface temperature above what it would be in the absence of the gases. Human activities, primarily the burning of fossil fuels and clearing of forests, have intensified the natural greenhouse effect, causing global warming.
Answer: (c)
The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases such as Carbon dioxide, and is re-radiated in all directions.
Since part of this re-radiation is back towards the surface and the lower atmosphere, it results in an elevation of the average surface temperature above what it would be in the absence of the gases. Human activities, primarily the burning of fossil fuels and clearing of forests, have intensified the natural greenhouse effect, causing global warming.
Answer: Option D. -> absorption of carbon dioxide
Answer: (d)Forests are considered as sinks of carbon dioxide. A carbon sink is anything that absorbs more carbon that it releases, whilst a carbon source is anything that releases more carbon than is absorb. It is for this reason that they are indispensable in the present global scenario marked by increasing global warming and climate change.
Answer: (d)Forests are considered as sinks of carbon dioxide. A carbon sink is anything that absorbs more carbon that it releases, whilst a carbon source is anything that releases more carbon than is absorb. It is for this reason that they are indispensable in the present global scenario marked by increasing global warming and climate change.
Answer: Option C. -> Snake
Answer: (c)
There are different types of interactions in the biotic community. Frog feeds for snakes. Snakes are the main predators of frogs.
The control over a prey is determined by the level of competition faced by other predators. If the same prey is prey to other predators, the control is considered to be lesser.
Answer: (c)
There are different types of interactions in the biotic community. Frog feeds for snakes. Snakes are the main predators of frogs.
The control over a prey is determined by the level of competition faced by other predators. If the same prey is prey to other predators, the control is considered to be lesser.
Answer: Option C. -> pollution and environmental damage
Answer: (c)
Green accounting is a type of accounting that attempts to factor environmental costs into the financial results of operations.
It has been argued that gross domestic product ignores the environment and therefore decision-makers need a revised model that incorporates green accounting.
Answer: (c)
Green accounting is a type of accounting that attempts to factor environmental costs into the financial results of operations.
It has been argued that gross domestic product ignores the environment and therefore decision-makers need a revised model that incorporates green accounting.
Answer: Option C. -> one organism to another
Answer: (c)
A food chain is a linear sequence of links in a food web starting from a trophic species that eats no other species in the web and ends at a trophic species that is eaten by no other species in the web.
A food chain differs from a food web because the complex polyphagous network of feeding relations are aggregated into trophic species and the chain only follows linear monophagous pathways. A common metric used to quantify food web trophic structure is food chain length. In its simplest form, the length of a chain is the number of links between a trophic consumer and the base of the web and the mean chain length of an entire web is the arithmetic average of the lengths of all chains in a food web.
Food chains were first introduced by the African-Arab scientist and philosopher Al-Jahiz in the 9th century and later popularized in a book published in 1927 by Charles Elton, which also introduced the food web concept.
Answer: (c)
A food chain is a linear sequence of links in a food web starting from a trophic species that eats no other species in the web and ends at a trophic species that is eaten by no other species in the web.
A food chain differs from a food web because the complex polyphagous network of feeding relations are aggregated into trophic species and the chain only follows linear monophagous pathways. A common metric used to quantify food web trophic structure is food chain length. In its simplest form, the length of a chain is the number of links between a trophic consumer and the base of the web and the mean chain length of an entire web is the arithmetic average of the lengths of all chains in a food web.
Food chains were first introduced by the African-Arab scientist and philosopher Al-Jahiz in the 9th century and later popularized in a book published in 1927 by Charles Elton, which also introduced the food web concept.
Answer: Option D. -> Sanitary landfilling
Answer: (d)Sanitary landfills are low lying sites where waste is isolated from the environment until it is safe. It is considered when it has completely degraded biologically, chemically and physically. In high-income countries, the level of isolation achieved may be high.
Answer: (d)Sanitary landfills are low lying sites where waste is isolated from the environment until it is safe. It is considered when it has completely degraded biologically, chemically and physically. In high-income countries, the level of isolation achieved may be high.
Answer: Option C. -> water
Answer: (c)
In ecology and biology, abiotic components (also known as abiotic factors) are non-living chemical and physical factors in the environment, which affect ecosystems. Abiotic phenomena underlie all of biology.
From the viewpoint of biology, abiotic factors can be classified as light or more generally radiation, temperature, water, the chemical surrounding composed of the terrestrial atmospheric gases, as well as soil.
The macroscopic climate often influences each of the above. A renewable resource is a natural resource with the ability to reproduce through biological or natural processes and replenished with the passage of time. Renewable resources are part of our natural environment and form our ecosystem.
Answer: (c)
In ecology and biology, abiotic components (also known as abiotic factors) are non-living chemical and physical factors in the environment, which affect ecosystems. Abiotic phenomena underlie all of biology.
From the viewpoint of biology, abiotic factors can be classified as light or more generally radiation, temperature, water, the chemical surrounding composed of the terrestrial atmospheric gases, as well as soil.
The macroscopic climate often influences each of the above. A renewable resource is a natural resource with the ability to reproduce through biological or natural processes and replenished with the passage of time. Renewable resources are part of our natural environment and form our ecosystem.
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