UPSC Static Quiz – Environment : 20 January 2025

UPSC Static Quiz – Environment : 20 January 2025 We will post 5 questions daily on static topics mentioned in the UPSC civil services preliminary examination syllabus. Each week will focus on a specific topic from the syllabus, such as History of India and Indian National Movement, Indian and World Geography, and more.We are excited to bring you our daily UPSC Static Quiz, designed to help you prepare for the UPSC Civil Services Preliminary Examination. Each day, we will post 5 questions on static topics mentioned in the UPSC syllabus. This week, we are focusing on Indian and World Geography.

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• Question 1 of 5 1. Question Consider the following statements regarding Sea Weeds. It is the common name for countless species of marine plants and algae. Sea weeds does not grow in flowing waters like rivers and streams. Seaweed cultivation is not part of aquaculture in India. Which of the above statements is/are correct? a) 1 only b) 1 and 3 only c) 2 and 3 only d) 1, 2 and 3 Correct Solution: a) Seaweeds are diverse marine plants and macroalgae found in oceans, lakes, and sometimes rivers. Statement 1 is correct because “seaweed” is a general term for numerous species of marine plants and algae that thrive in various aquatic environments. Statement 2 is incorrect as seaweeds can grow in various aquatic ecosystems, including flowing waters such as rivers and streams, though they predominantly thrive in saltwater environments like oceans and seas. Statement 3 is also incorrect because seaweed cultivation is an integral part of aquaculture in India. India has been actively promoting seaweed farming as a sustainable livelihood option for coastal communities. The cultivation of seaweed contributes to the fishing and aquaculture sector, which plays a significant role in India’s economy, contributing about 1.5% to GDP. Incorrect Solution: a) Seaweeds are diverse marine plants and macroalgae found in oceans, lakes, and sometimes rivers. Statement 1 is correct because “seaweed” is a general term for numerous species of marine plants and algae that thrive in various aquatic environments. Statement 2 is incorrect as seaweeds can grow in various aquatic ecosystems, including flowing waters such as rivers and streams, though they predominantly thrive in saltwater environments like oceans and seas. Statement 3 is also incorrect because seaweed cultivation is an integral part of aquaculture in India. India has been actively promoting seaweed farming as a sustainable livelihood option for coastal communities. The cultivation of seaweed contributes to the fishing and aquaculture sector, which plays a significant role in India’s economy, contributing about 1.5% to GDP.

#### 1. Question

Consider the following statements regarding Sea Weeds.

• It is the common name for countless species of marine plants and algae.

• Sea weeds does not grow in flowing waters like rivers and streams.

• Seaweed cultivation is not part of aquaculture in India.

Which of the above statements is/are correct?

• b) 1 and 3 only

• c) 2 and 3 only

• d) 1, 2 and 3

Solution: a)

Seaweeds are diverse marine plants and macroalgae found in oceans, lakes, and sometimes rivers. Statement 1 is correct because “seaweed” is a general term for numerous species of marine plants and algae that thrive in various aquatic environments.

Statement 2 is incorrect as seaweeds can grow in various aquatic ecosystems, including flowing waters such as rivers and streams, though they predominantly thrive in saltwater environments like oceans and seas.

Statement 3 is also incorrect because seaweed cultivation is an integral part of aquaculture in India. India has been actively promoting seaweed farming as a sustainable livelihood option for coastal communities. The cultivation of seaweed contributes to the fishing and aquaculture sector, which plays a significant role in India’s economy, contributing about 1.5% to GDP.

Solution: a)

• Question 2 of 5 2. Question Which of the following statements accurately describes the potential effects of the deep-winter heatwave in Antarctica? It could lead to a reduction in the Antarctic Ice Sheet, raising global sea levels. It might disrupt the global ocean circulation system, which regulates climate. It could strengthen the polar vortex, leading to colder global temperatures. How many of the above statements is/are incorrect? a) Only one b) Only two c) All three d) None Correct Solution: a) Statement 1 is correct: A heatwave can accelerate the melting of the Antarctic Ice Sheet, leading to a reduction in ice volume. This, in turn, contributes to rising global sea levels, posing a significant threat to coastal regions worldwide. Statement 2 is correct: The heatwave may disrupt the global ocean circulation system, such as the thermohaline circulation. This system is crucial for distributing heat and regulating climate patterns globally. Disruptions could cause extreme weather events and affect marine ecosystems. Statement 3 is incorrect: Rather than strengthening the polar vortex, a deep-winter heatwave weakens it. The polar vortex is a large-scale circulation of winds that helps trap cold air near the poles. A weakened polar vortex can result in warmer polar temperatures and altered weather patterns in the mid-latitudes. Incorrect Solution: a) Statement 1 is correct: A heatwave can accelerate the melting of the Antarctic Ice Sheet, leading to a reduction in ice volume. This, in turn, contributes to rising global sea levels, posing a significant threat to coastal regions worldwide. Statement 2 is correct: The heatwave may disrupt the global ocean circulation system, such as the thermohaline circulation. This system is crucial for distributing heat and regulating climate patterns globally. Disruptions could cause extreme weather events and affect marine ecosystems. Statement 3 is incorrect: Rather than strengthening the polar vortex, a deep-winter heatwave weakens it. The polar vortex is a large-scale circulation of winds that helps trap cold air near the poles. A weakened polar vortex can result in warmer polar temperatures and altered weather patterns in the mid-latitudes.

#### 2. Question

Which of the following statements accurately describes the potential effects of the deep-winter heatwave in Antarctica?

• It could lead to a reduction in the Antarctic Ice Sheet, raising global sea levels.

• It might disrupt the global ocean circulation system, which regulates climate.

• It could strengthen the polar vortex, leading to colder global temperatures.

How many of the above statements is/are incorrect?

• a) Only one

• b) Only two

• c) All three

Solution: a)

Statement 1 is correct: A heatwave can accelerate the melting of the Antarctic Ice Sheet, leading to a reduction in ice volume. This, in turn, contributes to rising global sea levels, posing a significant threat to coastal regions worldwide.

Statement 2 is correct: The heatwave may disrupt the global ocean circulation system, such as the thermohaline circulation. This system is crucial for distributing heat and regulating climate patterns globally. Disruptions could cause extreme weather events and affect marine ecosystems.

Statement 3 is incorrect: Rather than strengthening the polar vortex, a deep-winter heatwave weakens it. The polar vortex is a large-scale circulation of winds that helps trap cold air near the poles. A weakened polar vortex can result in warmer polar temperatures and altered weather patterns in the mid-latitudes.

Solution: a)

• Question 3 of 5 3. Question Which of the following statements regarding prokaryotes in marine ecosystems is correct? a) The decline of prokaryotes will have no significant impact on marine ecosystems. b) Prokaryotes will decline more in biomass compared to other marine life as oceans warm. c) Prokaryotes include organisms with complex cell structures and a defined nucleus. d) Prokaryotes play a vital role in supporting food chains and balancing carbon emissions in marine ecosystems. Correct Solution: d) Prokaryotes are simple, single-celled organisms, such as bacteria and archaea, that lack a defined nucleus. They are indispensable to marine ecosystems due to their critical roles in nutrient cycling, primary production, and carbon cycling. Option a is incorrect: Prokaryotes are essential for marine ecosystems. Their decline would severely disrupt food chains and biogeochemical cycles. Option b is incorrect: While many marine organisms may experience significant biomass loss due to warming oceans, prokaryotes are generally more resilient and may decline less, potentially altering ecosystem dynamics. Option c is incorrect: Prokaryotes do not possess complex cell structures or a defined nucleus; these are features of eukaryotic cells. Option d is correct: Prokaryotes support food chains by breaking down organic matter and cycling nutrients. They also play a vital role in balancing carbon emissions by sequestering carbon dioxide through processes like photosynthesis and decomposition. Incorrect Solution: d) Prokaryotes are simple, single-celled organisms, such as bacteria and archaea, that lack a defined nucleus. They are indispensable to marine ecosystems due to their critical roles in nutrient cycling, primary production, and carbon cycling. Option a is incorrect: Prokaryotes are essential for marine ecosystems. Their decline would severely disrupt food chains and biogeochemical cycles. Option b is incorrect: While many marine organisms may experience significant biomass loss due to warming oceans, prokaryotes are generally more resilient and may decline less, potentially altering ecosystem dynamics. Option c is incorrect: Prokaryotes do not possess complex cell structures or a defined nucleus; these are features of eukaryotic cells. Option d is correct: Prokaryotes support food chains by breaking down organic matter and cycling nutrients. They also play a vital role in balancing carbon emissions by sequestering carbon dioxide through processes like photosynthesis and decomposition.

#### 3. Question

Which of the following statements regarding prokaryotes in marine ecosystems is correct?

• a) The decline of prokaryotes will have no significant impact on marine ecosystems.

• b) Prokaryotes will decline more in biomass compared to other marine life as oceans warm.

• c) Prokaryotes include organisms with complex cell structures and a defined nucleus.

• d) Prokaryotes play a vital role in supporting food chains and balancing carbon emissions in marine ecosystems.

Solution: d)

Prokaryotes are simple, single-celled organisms, such as bacteria and archaea, that lack a defined nucleus. They are indispensable to marine ecosystems due to their critical roles in nutrient cycling, primary production, and carbon cycling.

• Option a is incorrect: Prokaryotes are essential for marine ecosystems. Their decline would severely disrupt food chains and biogeochemical cycles.

• Option b is incorrect: While many marine organisms may experience significant biomass loss due to warming oceans, prokaryotes are generally more resilient and may decline less, potentially altering ecosystem dynamics.

• Option c is incorrect: Prokaryotes do not possess complex cell structures or a defined nucleus; these are features of eukaryotic cells.

Option d is correct: Prokaryotes support food chains by breaking down organic matter and cycling nutrients. They also play a vital role in balancing carbon emissions by sequestering carbon dioxide through processes like photosynthesis and decomposition.

Solution: d)

• Option a is incorrect: Prokaryotes are essential for marine ecosystems. Their decline would severely disrupt food chains and biogeochemical cycles.

• Option c is incorrect: Prokaryotes do not possess complex cell structures or a defined nucleus; these are features of eukaryotic cells.

• Question 4 of 5 4. Question Consider the following statements regarding bio-plastics: Bio-plastics are always biodegradable and compostable. Bio-plastics are derived from renewable biomass sources like corn starch and sugarcane. Bio-plastics help reduce the dependency on fossil fuels for plastic production. How many of the above statements is/are correct? a) Only one b) Only two c) All three d) None Correct Solution: b) Statement 1 is incorrect: While bio-plastics are derived from renewable resources, not all are biodegradable or compostable. Some bio-plastics, such as certain types of polylactic acid (PLA), can persist in the environment under normal conditions, behaving similarly to conventional plastics. Statement 2 is correct: Bio-plastics are derived from renewable biomass sources such as corn starch, sugarcane, and other agricultural by-products. These materials are used as alternatives to petroleum-based raw materials. Statement 3 is correct: By using renewable feedstocks, bio-plastics help reduce dependence on fossil fuels, which are traditionally used in the production of conventional plastics. This shift supports sustainability efforts and decreases greenhouse gas emissions associated with plastic production. Incorrect Solution: b) Statement 1 is incorrect: While bio-plastics are derived from renewable resources, not all are biodegradable or compostable. Some bio-plastics, such as certain types of polylactic acid (PLA), can persist in the environment under normal conditions, behaving similarly to conventional plastics. Statement 2 is correct: Bio-plastics are derived from renewable biomass sources such as corn starch, sugarcane, and other agricultural by-products. These materials are used as alternatives to petroleum-based raw materials. Statement 3 is correct: By using renewable feedstocks, bio-plastics help reduce dependence on fossil fuels, which are traditionally used in the production of conventional plastics. This shift supports sustainability efforts and decreases greenhouse gas emissions associated with plastic production.

#### 4. Question

Consider the following statements regarding bio-plastics:

• Bio-plastics are always biodegradable and compostable.

• Bio-plastics are derived from renewable biomass sources like corn starch and sugarcane.

• Bio-plastics help reduce the dependency on fossil fuels for plastic production.

How many of the above statements is/are correct?

• a) Only one

• b) Only two

• c) All three

Solution: b)

Statement 1 is incorrect: While bio-plastics are derived from renewable resources, not all are biodegradable or compostable. Some bio-plastics, such as certain types of polylactic acid (PLA), can persist in the environment under normal conditions, behaving similarly to conventional plastics.

Statement 2 is correct: Bio-plastics are derived from renewable biomass sources such as corn starch, sugarcane, and other agricultural by-products. These materials are used as alternatives to petroleum-based raw materials.

Statement 3 is correct: By using renewable feedstocks, bio-plastics help reduce dependence on fossil fuels, which are traditionally used in the production of conventional plastics. This shift supports sustainability efforts and decreases greenhouse gas emissions associated with plastic production.

Solution: b)

• Question 5 of 5 5. Question Consider the following statements regarding the significance of big cats in ecosystem conservation: Big cats serve as umbrella species, helping protect broader ecosystems. India is home to 50% of the world’s tigers. Loss of big cats can result in overpopulation of prey species, leading to habitat degradation. Big cats have little impact on the trophic levels of ecosystems. How many of the above statements is/are incorrect? a) Only one b) Only two c) Only three d) All four Correct Solution: b) Big cats are considered umbrella species because their conservation protects entire ecosystems, including other species that share their habitats (statement 1). The loss of apex predators like big cats can lead to an overpopulation of prey species, which causes overgrazing and habitat degradation (statement 3). India is home to 75% of the world’s tigers, not 50%, making statement 2 incorrect. Statement 4 is also incorrect, as big cats significantly influence the trophic levels within their ecosystems. Incorrect Solution: b) Big cats are considered umbrella species because their conservation protects entire ecosystems, including other species that share their habitats (statement 1). The loss of apex predators like big cats can lead to an overpopulation of prey species, which causes overgrazing and habitat degradation (statement 3). India is home to 75% of the world’s tigers, not 50%, making statement 2 incorrect. Statement 4 is also incorrect, as big cats significantly influence the trophic levels within their ecosystems.

#### 5. Question

Consider the following statements regarding the significance of big cats in ecosystem conservation:

• Big cats serve as umbrella species, helping protect broader ecosystems.

• India is home to 50% of the world’s tigers.

• Loss of big cats can result in overpopulation of prey species, leading to habitat degradation.

• Big cats have little impact on the trophic levels of ecosystems.

How many of the above statements is/are incorrect?

• a) Only one

• b) Only two

• c) Only three

• d) All four

Solution: b)

• Big cats are considered umbrella species because their conservation protects entire ecosystems, including other species that share their habitats (statement 1).

• The loss of apex predators like big cats can lead to an overpopulation of prey species, which causes overgrazing and habitat degradation (statement 3).

• India is home to 75% of the world’s tigers, not 50%, making statement 2 incorrect.

• Statement 4 is also incorrect, as big cats significantly influence the trophic levels within their ecosystems.

Solution: b)

• Big cats are considered umbrella species because their conservation protects entire ecosystems, including other species that share their habitats (statement 1).

• The loss of apex predators like big cats can lead to an overpopulation of prey species, which causes overgrazing and habitat degradation (statement 3).

• India is home to 75% of the world’s tigers, not 50%, making statement 2 incorrect.

• Statement 4 is also incorrect, as big cats significantly influence the trophic levels within their ecosystems.

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