IASbaba's Daily Static Quiz
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DAILY STATIC QUIZ will cover all the topics of Static/Core subjects – Polity, History, Geography, Economics, Environment and Science and technology.
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UPSC Static Quiz - 2020: IASbaba's Daily Static Quiz - ENVIRONMENT [Day 60]
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Question 1 of 10
1. Question
Consider the following statements:
- The sudden and unpredictable change in the species composition of a given area is called ecological succession.
- The entire sequence of communities that successively change in a given area are called seral communities.
Which of the statements given above is/are NOT CORRECT?
Correct
Solution (c)
The gradual and fairly predictable change in the species composition of a given area is called ecological succession.
Hence Statement 1 is incorrect.
The entire sequence of communities that successively change in a given area are called sere(s).
The individual transitional communities are termed seral stages or seral communities.
Hence Statement 2 is incorrect.
Incorrect
Solution (c)
The gradual and fairly predictable change in the species composition of a given area is called ecological succession.
Hence Statement 1 is incorrect.
The entire sequence of communities that successively change in a given area are called sere(s).
The individual transitional communities are termed seral stages or seral communities.
Hence Statement 2 is incorrect.
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Question 2 of 10
2. Question
Consider the following statements:
- Before a biotic community of diverse organisms can become established, there must be soil.
- Primary succession begins in areas where natural biotic communities have been destroyed.
Which of the statements given above is/are correct?
Correct
Solution (a)
Before a biotic community of diverse organisms can become established, there must be soil.
Hence Statement 1 is correct.
Secondary succession begins in areas where natural biotic communities have been destroyed.
Hence Statement 2 is incorrect.
Incorrect
Solution (a)
Before a biotic community of diverse organisms can become established, there must be soil.
Hence Statement 1 is correct.
Secondary succession begins in areas where natural biotic communities have been destroyed.
Hence Statement 2 is incorrect.
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Question 3 of 10
3. Question
Consider the following statements:
- The species that invade a bare area are called pioneer species.
- The climax community remains stable as long as the environment remains unchanged.
Which of the statements given above is/are correct?
Correct
Solution (c)
The species that invade a bare area are called pioneer species. In primary succession on rocks these are usually lichens which are able to secrete acids to dissolve rock,
Hence Statement 1 is correct.
The climax community remains stable as long as the environment remains unchanged.
Hence Statement 2 is correct.
Incorrect
Solution (c)
The species that invade a bare area are called pioneer species. In primary succession on rocks these are usually lichens which are able to secrete acids to dissolve rock,
Hence Statement 1 is correct.
The climax community remains stable as long as the environment remains unchanged.
Hence Statement 2 is correct.
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Question 4 of 10
4. Question
Consider the following statements:
- Nitrifying bacteria change the ammonia in the soil to nitrates and then into nitrites.
- Nitrogen oxides dissolve in rain forming nitrates.
Which of the statements given above is/are NOT CORRECT?
Correct
Solution (a)
Nitrifying bacteria change the ammonia in the soil to nitrites and then into nitrates.
Hence Statement 1 is incorrect.
Nitrogen oxides dissolve in rain forming nitrates.
Hence Statement 2 is correct.
Additional Information:
The inert nature of N2 means that biologically available nitrogen is often in short supply in natural ecosystems, limiting plant growth.
Incorrect
Solution (a)
Nitrifying bacteria change the ammonia in the soil to nitrites and then into nitrates.
Hence Statement 1 is incorrect.
Nitrogen oxides dissolve in rain forming nitrates.
Hence Statement 2 is correct.
Additional Information:
The inert nature of N2 means that biologically available nitrogen is often in short supply in natural ecosystems, limiting plant growth.
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Question 5 of 10
5. Question
Consider the following statements:
- Oceans stores significantly higher amounts of Carbon as compared to atmosphere.
- Decomposers also contribute substantially to CO2 pool by their processing of waste materials.
Which of the statements given above is/are correct?
Correct
Solution (c)
Oceans stores significantly higher amounts of Carbon as compared to atmosphere.
Hence Statement 1 is correct.
Decomposers also contribute substantially to CO2 pool by their processing of waste materials and dead organic matter of land or oceans.
Hence Statement 2 is correct.
Incorrect
Solution (c)
Oceans stores significantly higher amounts of Carbon as compared to atmosphere.
Hence Statement 1 is correct.
Decomposers also contribute substantially to CO2 pool by their processing of waste materials and dead organic matter of land or oceans.
Hence Statement 2 is correct.
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Question 6 of 10
6. Question
Consider the following statements:.
- The flow of energy from producer to top consumers is called energy flow which is bidirectional.
- The pyramid of energy is always upward, with a large energy base at the bottom.
- Biomass pyramid concept helps to explain the phenomenon of biological magnification.
Which of the above statements is/are correct?
Correct
Solution (a)
The flow of energy from producer to top consumers is called energy flow which is unidirectional.
Hence Statement 1 is incorrect
The pyramid is always upward, with a large energy base at the bottom.
Hence Statement 2 is correct
Energy pyramid concept helps to explain the phenomenon of biological magnification the tendency for toxic substances to increase in concentration progressively at higher levels of the food chain
Hence Statement 3 is incorrect
Incorrect
Solution (a)
The flow of energy from producer to top consumers is called energy flow which is unidirectional.
Hence Statement 1 is incorrect
The pyramid is always upward, with a large energy base at the bottom.
Hence Statement 2 is correct
Energy pyramid concept helps to explain the phenomenon of biological magnification the tendency for toxic substances to increase in concentration progressively at higher levels of the food chain
Hence Statement 3 is incorrect
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Question 7 of 10
7. Question
Biomagnification refers to the tendency of pollutants to concentrate as they move from one trophic level to the next. Consider the following statements.
- In biomagnification there is an increase in concentration of a pollutant from one link in a food chain to another.
- In order for biomagnification to occur, the pollutant must be long-lived, mobile, soluble in water and biologically inactive.
Which of the above statements is/are correct?
Correct
Solution (a)
In biomagnification there is an increase in concentration of a pollutant from one link in a food chain to another.
Hence Statement 1 is correct
In order for biomagnification to occur, the pollutant must be: long-lived, mobile, soluble in fats, biologically active.
Hence Statement 2 is incorrect
Incorrect
Solution (a)
In biomagnification there is an increase in concentration of a pollutant from one link in a food chain to another.
Hence Statement 1 is correct
In order for biomagnification to occur, the pollutant must be: long-lived, mobile, soluble in fats, biologically active.
Hence Statement 2 is incorrect
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Question 8 of 10
8. Question
With reference to food chains in ecosystems, consider the following statements:
- A food chain illustrates the order in which a chain of organisms feed upon each other.
- A food chain illustrates the numbers of each organism which are eaten by others.
Which of the statements given above is / are correct?
Correct
Solution (a)
A food chain illustrates the order in which a chain of organisms feed upon each other.
Hence statement 1 is correct.
A food web illustrates the numbers of each organism which are eaten by others
Hence statement 2 is incorrect.
Incorrect
Solution (a)
A food chain illustrates the order in which a chain of organisms feed upon each other.
Hence statement 1 is correct.
A food web illustrates the numbers of each organism which are eaten by others
Hence statement 2 is incorrect.
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Question 9 of 10
9. Question
Which of the statements given below is/are correct regarding phosphorus cycle?
- Rocks are the major reservoir of phosphorus which contains phosphorus in the form of phosphates.
- Animals obtain phosphorus indirectly through plants.
- There is no respiratory release of phosphorus in atmosphere.
Select the correct answer from the code given below:
Correct
Solution (d)
Rocks are the major reservoir of phosphorus which contains phosphorus in the form of phosphates.
Hence statement 1 is correct.
Animals obtain phosphorus indirectly through plants.
Hence statement 2 is correct.
There is no respiratory release of phosphorus in atmosphere.
Hence statement 3 is correct.
Incorrect
Solution (d)
Rocks are the major reservoir of phosphorus which contains phosphorus in the form of phosphates.
Hence statement 1 is correct.
Animals obtain phosphorus indirectly through plants.
Hence statement 2 is correct.
There is no respiratory release of phosphorus in atmosphere.
Hence statement 3 is correct.
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Question 10 of 10
10. Question
The benefits that people obtain from ecosystems are termed as ecosystem services. Which of the following is/are the types of Ecosystem services?
- Provisioning services
- Regulating services
- Habitat services
- Cultural services
Select the correct answer from the code given below:
Correct
Solution (d)
Ecosystem services can be categorized in four main types:
Provisioning services are the products obtained from ecosystems such as food, fresh water, wood, fiber, genetic resources and medicines.
Regulating services are defined as the benefits obtained from the regulation of ecosystem processes such as climate regulation, natural hazard regulation, water purification and waste management, pollination or pest control.
Habitat services highlight the importance of ecosystems to provide habitat for migratory species and to maintain the viability of gene-pools.
Cultural services include non-material benefits that people obtain from ecosystems such as spiritual enrichment, intellectual development, recreation and aesthetic values.
Incorrect
Solution (d)
Ecosystem services can be categorized in four main types:
Provisioning services are the products obtained from ecosystems such as food, fresh water, wood, fiber, genetic resources and medicines.
Regulating services are defined as the benefits obtained from the regulation of ecosystem processes such as climate regulation, natural hazard regulation, water purification and waste management, pollination or pest control.
Habitat services highlight the importance of ecosystems to provide habitat for migratory species and to maintain the viability of gene-pools.
Cultural services include non-material benefits that people obtain from ecosystems such as spiritual enrichment, intellectual development, recreation and aesthetic values.
