01 October Static Quiz 2021
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01 October Static Quiz 2021 for UPSC Prelims
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- Question 1 of 5
1. Question
Consider the following methods:
1. Improving drainage
2. Leaching
3. Increasing the evaporation
4. Applying chemical treatments like adding gypsum
Which of the methods given above can be applied to correct the salt-affected soils?CorrectAnswer: A
Reducing evaporation: Applying residue or mulch to the soil can help lower evaporation rates. As an
increase in evaporation increases salinity. Hence option 3 is not correct.IncorrectAnswer: A
Reducing evaporation: Applying residue or mulch to the soil can help lower evaporation rates. As an
increase in evaporation increases salinity. Hence option 3 is not correct. - Question 2 of 5
2. Question
With reference to the threat to Earth’s biodiversity, consider the following statements:
1. Currently, the world is witnessing the ‘Sixth Mass Extinction’ which is faster than the previous five episodes.
2. Steller’s Sea Cow and Quagga are now extinct.
Which of the statements given above is/are correct?CorrectAnswer: C
Both the statements are correct.IncorrectAnswer: C
Both the statements are correct. - Question 3 of 5
3. Question
In the context of environment and ecology, consider the following statements regarding ‘standing crop’:
1. It is the total amount of food grains available in a region at a given point in time.
2. It is measured in terms of the mass of living organisms.
Which of the statements given above is/are correct?CorrectAnswer: B
Statement 1 is not correct: Each trophic level has a certain mass of living material at a particular time
called as the standing crop. A standing crop is the total dried biomass of the living organisms present in a
given environment. It is not limited to the food grains.IncorrectAnswer: B
Statement 1 is not correct: Each trophic level has a certain mass of living material at a particular time
called as the standing crop. A standing crop is the total dried biomass of the living organisms present in a
given environment. It is not limited to the food grains. - Question 4 of 5
4. Question
Which of the following statements regarding a grazing food chain is/are correct?
1. In all grazing food chains, the first trophic level is always occupied by producers.
2. Herbivores are always placed at the third trophic level in a grazing food chain.
Select the correct answer using the code given below.CorrectAnswer: A
Statement 1 is correct and statement 2 is not correct: Organisms occupy a place in the natural
surroundings or in a community according to their feeding relationship with other organisms. Based on
the source of their nutrition or food, organisms occupy a specific place in the food chain that is known as
their trophic level. Producers belong to the first trophic level, herbivores (primary consumer) to
the second and carnivores (secondary consumer) to the third.IncorrectAnswer: A
Statement 1 is correct and statement 2 is not correct: Organisms occupy a place in the natural
surroundings or in a community according to their feeding relationship with other organisms. Based on
the source of their nutrition or food, organisms occupy a specific place in the food chain that is known as
their trophic level. Producers belong to the first trophic level, herbivores (primary consumer) to
the second and carnivores (secondary consumer) to the third. - Question 5 of 5
5. Question
Which of the following best describes the term ‘Bioremediation’?
CorrectAnswer: A
IncorrectAnswer: A
