UPSC Current Affairs Quiz : 26 August 2025

The Current Affairs Quiz 2024 is a daily quiz based on the DAILY CURRENT AFFAIRS AND PIB SUMMARY from the previous day, as posted on our website. It covers all relevant news sources and is designed to test your knowledge of current events. Solving these questions will help you retain both concepts and facts relevant to the UPSC IAS civil services exam.

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• Question 1 of 10 1. Question 1 points Consider the following statements regarding Ethanol Blended Petrol (EBP) Programme: Statement-I: The Ethanol Blended Petrol (EBP) Programme is primarily aimed at enhancing India’s energy security and achieving environmental benefits. Statement-II: The programme encourages the diversion of surplus foodgrains and sugarcane for ethanol production, which provides an assured market and income stability for farmers. Which one of the following is correct in respect of the above statements? (a) Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I (b) Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I (c) Statement-I is correct but Statement-II is incorrect (d) Statement-I is incorrect but Statement-II is correct Correct Solution: B Statement-I is correct. The EBP Programme’s core objectives are twofold: enhancing energy security by reducing dependence on imported crude oil and achieving environmental goals by lowering vehicular emissions. Blending petrol with ethanol, a renewable fuel, directly contributes to these outcomes. Statement-II is also correct. The programme relies on feedstocks like sugarcane and surplus foodgrains. By creating a dedicated industrial demand for these agricultural products, it provides farmers with an alternative and assured market. This helps in stabilising their income, especially when there is a surplus production that could otherwise lead to price crashes. Incorrect Solution: B Statement-I is correct. The EBP Programme’s core objectives are twofold: enhancing energy security by reducing dependence on imported crude oil and achieving environmental goals by lowering vehicular emissions. Blending petrol with ethanol, a renewable fuel, directly contributes to these outcomes. Statement-II is also correct. The programme relies on feedstocks like sugarcane and surplus foodgrains. By creating a dedicated industrial demand for these agricultural products, it provides farmers with an alternative and assured market. This helps in stabilising their income, especially when there is a surplus production that could otherwise lead to price crashes.

#### 1. Question

Consider the following statements regarding Ethanol Blended Petrol (EBP) Programme:

Statement-I: The Ethanol Blended Petrol (EBP) Programme is primarily aimed at enhancing India’s energy security and achieving environmental benefits.

Statement-II: The programme encourages the diversion of surplus foodgrains and sugarcane for ethanol production, which provides an assured market and income stability for farmers.

Which one of the following is correct in respect of the above statements?

• (a) Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I

• (b) Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I

• (c) Statement-I is correct but Statement-II is incorrect

• (d) Statement-I is incorrect but Statement-II is correct

Solution: B

• Statement-I is correct. The EBP Programme’s core objectives are twofold: enhancing energy security by reducing dependence on imported crude oil and achieving environmental goals by lowering vehicular emissions. Blending petrol with ethanol, a renewable fuel, directly contributes to these outcomes.

• Statement-II is also correct. The programme relies on feedstocks like sugarcane and surplus foodgrains. By creating a dedicated industrial demand for these agricultural products, it provides farmers with an alternative and assured market. This helps in stabilising their income, especially when there is a surplus production that could otherwise lead to price crashes.

Solution: B

• Question 2 of 10 2. Question 1 points Consider the following statements regarding India’s Integrated Air Defence Weapon System (IADWS): The system integrates kinetic interceptors like Quick Reaction Surface-to-Air Missile (QRSAM) with non-kinetic weapons such as Directed Energy Weapons (DEW). Project Sudarshan Chakra, under which IADWS is developed, is a collaborative effort between DRDO and an Israeli defence firm. The Very Short Range Air Defence System (VSHORADS) component is primarily designed to engage high-altitude, high-speed fighter jets. The system’s Command and Control Centre can track and engage multiple targets simultaneously. How many of the above statements are correct? (a) Only one (b) Only two (c) Only three (d) All four Correct Solution: B Statement 1 is correct. IADWS creates a multi-layered shield by combining different types of weapons. It uses kinetic interceptors (missiles like QRSAM that physically destroy targets) and non-kinetic weapons (like high-power lasers or DEWs that disable targets using energy), providing a comprehensive defence. Statement 2 is incorrect. The IADWS, developed under Project Sudarshan Chakra, is an indigenous system developed by the Defence Research & Development Organisation (DRDO). Statement 3 is incorrect. The Very Short Range Air Defence System (VSHORADS) is designed for the middle layer of defence, specifically against low-flying targets like helicopters, UAVs, and loitering munitions within a range of about 6 km. High-altitude, high-speed jets are engaged by the outer layer, the QRSAM. Statement 4 is correct. A key feature of this network-centric system is its Centralised Command & Control Centre, which provides a real-time air picture and allows for simultaneous tracking and engagement of multiple aerial threats, allocating the most appropriate weapon for each. Incorrect Solution: B Statement 1 is correct. IADWS creates a multi-layered shield by combining different types of weapons. It uses kinetic interceptors (missiles like QRSAM that physically destroy targets) and non-kinetic weapons (like high-power lasers or DEWs that disable targets using energy), providing a comprehensive defence. Statement 2 is incorrect. The IADWS, developed under Project Sudarshan Chakra, is an indigenous system developed by the Defence Research & Development Organisation (DRDO). Statement 3 is incorrect. The Very Short Range Air Defence System (VSHORADS) is designed for the middle layer of defence, specifically against low-flying targets like helicopters, UAVs, and loitering munitions within a range of about 6 km. High-altitude, high-speed jets are engaged by the outer layer, the QRSAM. Statement 4 is correct. A key feature of this network-centric system is its Centralised Command & Control Centre, which provides a real-time air picture and allows for simultaneous tracking and engagement of multiple aerial threats, allocating the most appropriate weapon for each.

#### 2. Question

Consider the following statements regarding India’s Integrated Air Defence Weapon System (IADWS):

• The system integrates kinetic interceptors like Quick Reaction Surface-to-Air Missile (QRSAM) with non-kinetic weapons such as Directed Energy Weapons (DEW).

• Project Sudarshan Chakra, under which IADWS is developed, is a collaborative effort between DRDO and an Israeli defence firm.

• The Very Short Range Air Defence System (VSHORADS) component is primarily designed to engage high-altitude, high-speed fighter jets.

• The system’s Command and Control Centre can track and engage multiple targets simultaneously.

How many of the above statements are correct?

• (a) Only one

• (b) Only two

• (c) Only three

• (d) All four

Solution: B

• Statement 1 is correct. IADWS creates a multi-layered shield by combining different types of weapons. It uses kinetic interceptors (missiles like QRSAM that physically destroy targets) and non-kinetic weapons (like high-power lasers or DEWs that disable targets using energy), providing a comprehensive defence.

• Statement 2 is incorrect. The IADWS, developed under Project Sudarshan Chakra, is an indigenous system developed by the Defence Research & Development Organisation (DRDO).

• Statement 3 is incorrect. The Very Short Range Air Defence System (VSHORADS) is designed for the middle layer of defence, specifically against low-flying targets like helicopters, UAVs, and loitering munitions within a range of about 6 km. High-altitude, high-speed jets are engaged by the outer layer, the QRSAM.

• Statement 4 is correct. A key feature of this network-centric system is its Centralised Command & Control Centre, which provides a real-time air picture and allows for simultaneous tracking and engagement of multiple aerial threats, allocating the most appropriate weapon for each.

Solution: B

• Statement 2 is incorrect. The IADWS, developed under Project Sudarshan Chakra, is an indigenous system developed by the Defence Research & Development Organisation (DRDO).

• Question 3 of 10 3. Question 1 points Which of the following most accurately describes the primary reason why Invasive Alien Species (IAS) pose a significant threat to India’s biodiversity and economy, as highlighted by recent studies? (a) They primarily cause health hazards such as allergies, which increases public health expenditure. (b) Their management costs are transparently reported, revealing a massive drain on the national exchequer. (c) They are introduced mainly through illegal trade, making their management a law-and-order problem. (d) They thrive due to the absence of natural predators in new habitats, allowing them to outcompete and displace native species. Correct Solution: D Option (d) is the most accurate description. The fundamental characteristic of an invasive species is its ability to flourish in a new environment, often because the natural checks and balances (like predators, parasites, or diseases) that controlled its population in its native habitat are absent. This gives them a competitive advantage over native species for resources like light, water, and nutrients, leading to biodiversity loss and ecosystem degradation, which in turn causes economic harm. Incorrect Solution: D Option (d) is the most accurate description. The fundamental characteristic of an invasive species is its ability to flourish in a new environment, often because the natural checks and balances (like predators, parasites, or diseases) that controlled its population in its native habitat are absent. This gives them a competitive advantage over native species for resources like light, water, and nutrients, leading to biodiversity loss and ecosystem degradation, which in turn causes economic harm.

#### 3. Question

Which of the following most accurately describes the primary reason why Invasive Alien Species (IAS) pose a significant threat to India’s biodiversity and economy, as highlighted by recent studies?

• (a) They primarily cause health hazards such as allergies, which increases public health expenditure.

• (b) Their management costs are transparently reported, revealing a massive drain on the national exchequer.

• (c) They are introduced mainly through illegal trade, making their management a law-and-order problem.

• (d) They thrive due to the absence of natural predators in new habitats, allowing them to outcompete and displace native species.

Solution: D

• Option (d) is the most accurate description. The fundamental characteristic of an invasive species is its ability to flourish in a new environment, often because the natural checks and balances (like predators, parasites, or diseases) that controlled its population in its native habitat are absent. This gives them a competitive advantage over native species for resources like light, water, and nutrients, leading to biodiversity loss and ecosystem degradation, which in turn causes economic harm.

Solution: D

• Question 4 of 10 4. Question 1 points Consider the following statements regarding the Archaeological Survey of India (ASI): Statement I: The ASI operates as the apex government body for the protection of cultural heritage, exercising regulatory powers over activities near protected sites. Statement II: It functions under the mandate of the Ancient Monuments and Archaeological Sites and Remains Act, 1958. Statement III: The present organisational structure of ASI, with its headquarters in New Delhi and regional circles, was established by its founder, Alexander Cunningham. Which one of the following is correct in respect of the above statements? (a) Both Statement II and Statement III are correct and both of them explain Statement I (b) Both Statement II and Statement III are correct but only one of them explains Statement I (c) Only Statement II is correct and it explains Statement I (d) Neither Statement II nor Statement III is correct Correct Solution: C Statement I is correct. It accurately describes the role of the ASI as the primary government agency for heritage protection and its authority to regulate activities, such as construction, near monuments it protects. Statement II is also correct. The ASI derives its primary legal powers and functions from the Ancient Monuments and Archaeological Sites and Remains Act, 1958. This legislation empowers it to declare monuments of national importance and regulate them. This statement directly provides the legal foundation for the functions described in Statement I, thus explaining it. Statement III is incorrect. While Alexander Cunningham founded the ASI in 1861, its current modern structure with numerous specialised wings, over 36 circles, and a large administrative framework under the Ministry of Culture was not established by him. The organisation was significantly restructured and expanded post-Independence to meet the needs of a sovereign nation. Incorrect Solution: C Statement I is correct. It accurately describes the role of the ASI as the primary government agency for heritage protection and its authority to regulate activities, such as construction, near monuments it protects. Statement II is also correct. The ASI derives its primary legal powers and functions from the Ancient Monuments and Archaeological Sites and Remains Act, 1958. This legislation empowers it to declare monuments of national importance and regulate them. This statement directly provides the legal foundation for the functions described in Statement I, thus explaining it. Statement III is incorrect. While Alexander Cunningham founded the ASI in 1861, its current modern structure with numerous specialised wings, over 36 circles, and a large administrative framework under the Ministry of Culture was not established by him. The organisation was significantly restructured and expanded post-Independence to meet the needs of a sovereign nation.

#### 4. Question

Consider the following statements regarding the Archaeological Survey of India (ASI):

Statement I: The ASI operates as the apex government body for the protection of cultural heritage, exercising regulatory powers over activities near protected sites.

Statement II: It functions under the mandate of the Ancient Monuments and Archaeological Sites and Remains Act, 1958.

Statement III: The present organisational structure of ASI, with its headquarters in New Delhi and regional circles, was established by its founder, Alexander Cunningham.

Which one of the following is correct in respect of the above statements?

• (a) Both Statement II and Statement III are correct and both of them explain Statement I

• (b) Both Statement II and Statement III are correct but only one of them explains Statement I

• (c) Only Statement II is correct and it explains Statement I

• (d) Neither Statement II nor Statement III is correct

Solution: C

• Statement I is correct. It accurately describes the role of the ASI as the primary government agency for heritage protection and its authority to regulate activities, such as construction, near monuments it protects.

• Statement II is also correct. The ASI derives its primary legal powers and functions from the Ancient Monuments and Archaeological Sites and Remains Act, 1958. This legislation empowers it to declare monuments of national importance and regulate them. This statement directly provides the legal foundation for the functions described in Statement I, thus explaining it.

• Statement III is incorrect. While Alexander Cunningham founded the ASI in 1861, its current modern structure with numerous specialised wings, over 36 circles, and a large administrative framework under the Ministry of Culture was not established by him. The organisation was significantly restructured and expanded post-Independence to meet the needs of a sovereign nation.

Solution: C

• Question 5 of 10 5. Question 1 points Match the following ISRO launch vehicles with their key characteristic or mission: Launch Vehicle Characteristic / Mission 1. SLV-3 Placed the first Rohini satellite in orbit 2. PSLV Launched the Mangalyaan mission 3. LVM-3 Introduced indigenous cryogenic engines to ISRO 4. LMLV Designed for a payload capacity of ~80 tonnes to GTO How many of the pairs given above are correctly matched? (a) Only one (b) Only two (c) Only three (d) All four Correct Solution: B Pair 1 is correctly matched. The Satellite Launch Vehicle (SLV-3) was India’s first indigenous satellite launch vehicle, and its first successful flight in 1980 placed the Rohini satellite RS-1 into orbit. Pair 2 is correctly matched. The Polar Satellite Launch Vehicle (PSLV) is known as ISRO’s workhorse and has been used for numerous historic missions, including Chandrayaan-1 (2008) and the Mars Orbiter Mission (Mangalyaan, 2013). Pair 3 is incorrect. The GSLV (Geosynchronous Satellite Launch Vehicle), particularly the GSLV Mk-II, was the vehicle on which ISRO first successfully flew its indigenous cryogenic upper stage. LVM-3 (GSLV Mk-III) uses a more powerful indigenous cryogenic engine (CE-20) but did not ‘introduce’ the technology to ISRO. Pair 4 is incorrect. The planned Lunar Module Launch Vehicle (LMLV) is designed for a payload capacity of ~80 tonnes to Low Earth Orbit (LEO), not Geostationary Transfer Orbit (GTO). Its payload to the Moon is planned to be around 27 tonnes. Incorrect Solution: B Pair 1 is correctly matched. The Satellite Launch Vehicle (SLV-3) was India’s first indigenous satellite launch vehicle, and its first successful flight in 1980 placed the Rohini satellite RS-1 into orbit. Pair 2 is correctly matched. The Polar Satellite Launch Vehicle (PSLV) is known as ISRO’s workhorse and has been used for numerous historic missions, including Chandrayaan-1 (2008) and the Mars Orbiter Mission (Mangalyaan, 2013). Pair 3 is incorrect. The GSLV (Geosynchronous Satellite Launch Vehicle), particularly the GSLV Mk-II, was the vehicle on which ISRO first successfully flew its indigenous cryogenic upper stage. LVM-3 (GSLV Mk-III) uses a more powerful indigenous cryogenic engine (CE-20) but did not ‘introduce’ the technology to ISRO. Pair 4 is incorrect. The planned Lunar Module Launch Vehicle (LMLV) is designed for a payload capacity of ~80 tonnes to Low Earth Orbit (LEO), not Geostationary Transfer Orbit (GTO). Its payload to the Moon is planned to be around 27 tonnes.

#### 5. Question

Match the following ISRO launch vehicles with their key characteristic or mission:

Launch Vehicle | Characteristic / Mission

1.SLV-3 | Placed the first Rohini satellite in orbit
2.PSLV | Launched the Mangalyaan mission
3.LVM-3 | Introduced indigenous cryogenic engines to ISRO
4.LMLV | Designed for a payload capacity of ~80 tonnes to GTO

How many of the pairs given above are correctly matched?

• (a) Only one

• (b) Only two

• (c) Only three

• (d) All four

Solution: B

• Pair 1 is correctly matched. The Satellite Launch Vehicle (SLV-3) was India’s first indigenous satellite launch vehicle, and its first successful flight in 1980 placed the Rohini satellite RS-1 into orbit.

• Pair 2 is correctly matched. The Polar Satellite Launch Vehicle (PSLV) is known as ISRO’s workhorse and has been used for numerous historic missions, including Chandrayaan-1 (2008) and the Mars Orbiter Mission (Mangalyaan, 2013).

• Pair 3 is incorrect. The GSLV (Geosynchronous Satellite Launch Vehicle), particularly the GSLV Mk-II, was the vehicle on which ISRO first successfully flew its indigenous cryogenic upper stage. LVM-3 (GSLV Mk-III) uses a more powerful indigenous cryogenic engine (CE-20) but did not ‘introduce’ the technology to ISRO.

• Pair 4 is incorrect. The planned Lunar Module Launch Vehicle (LMLV) is designed for a payload capacity of ~80 tonnes to Low Earth Orbit (LEO), not Geostationary Transfer Orbit (GTO). Its payload to the Moon is planned to be around 27 tonnes.

Solution: B

• Question 6 of 10 6. Question 1 points With reference to Wastewater-Based Epidemiology (WBE), consider the following statements: WBE serves as a predictive tool, capable of providing community-level insights into disease prevalence before clinical diagnoses become widespread. The methodology involves testing treated sewage water for pathogens, as the treatment process concentrates viral RNA. The planned expansion of this surveillance in India includes tracking pathogens responsible for acute encephalitis syndrome. How many of the above statements are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: B Statement 1 is correct. The core advantage of WBE is its function as an early warning system. By detecting pathogen fragments in sewage, it can identify rising community transmission often days or weeks before people show symptoms and seek clinical help, thus being a predictive tool for public health officials. Statement 2 is incorrect. Samples for wastewater surveillance are taken from untreated sewage or raw sewage entering a treatment plant. The purpose is to capture the complete profile of pathogens shed by the community. Testing treated water would be ineffective as the treatment process is designed to remove or deactivate these very pathogens. Statement 3 is correct. The ICMR’s planned expansion aims to move beyond just COVID-19 and Polio. It intends to track 10 viruses in total, including those linked to a range of illnesses such as fever, diarrhoea, respiratory illnesses, and acute encephalitis syndrome, making the surveillance system more comprehensive. Incorrect Solution: B Statement 1 is correct. The core advantage of WBE is its function as an early warning system. By detecting pathogen fragments in sewage, it can identify rising community transmission often days or weeks before people show symptoms and seek clinical help, thus being a predictive tool for public health officials. Statement 2 is incorrect. Samples for wastewater surveillance are taken from untreated sewage or raw sewage entering a treatment plant. The purpose is to capture the complete profile of pathogens shed by the community. Testing treated water would be ineffective as the treatment process is designed to remove or deactivate these very pathogens. Statement 3 is correct. The ICMR’s planned expansion aims to move beyond just COVID-19 and Polio. It intends to track 10 viruses in total, including those linked to a range of illnesses such as fever, diarrhoea, respiratory illnesses, and acute encephalitis syndrome, making the surveillance system more comprehensive.

#### 6. Question

With reference to Wastewater-Based Epidemiology (WBE), consider the following statements:

• WBE serves as a predictive tool, capable of providing community-level insights into disease prevalence before clinical diagnoses become widespread.

• The methodology involves testing treated sewage water for pathogens, as the treatment process concentrates viral RNA.

• The planned expansion of this surveillance in India includes tracking pathogens responsible for acute encephalitis syndrome.

How many of the above statements are correct?

• (a) Only one

• (b) Only two

• (c) All three

Solution: B

• Statement 1 is correct. The core advantage of WBE is its function as an early warning system. By detecting pathogen fragments in sewage, it can identify rising community transmission often days or weeks before people show symptoms and seek clinical help, thus being a predictive tool for public health officials.

• Statement 2 is incorrect. Samples for wastewater surveillance are taken from untreated sewage or raw sewage entering a treatment plant. The purpose is to capture the complete profile of pathogens shed by the community. Testing treated water would be ineffective as the treatment process is designed to remove or deactivate these very pathogens.

• Statement 3 is correct. The ICMR’s planned expansion aims to move beyond just COVID-19 and Polio. It intends to track 10 viruses in total, including those linked to a range of illnesses such as fever, diarrhoea, respiratory illnesses, and acute encephalitis syndrome, making the surveillance system more comprehensive.

Solution: B

• Question 7 of 10 7. Question 1 points Consider the following statements about the geography and demography of Fiji: Fiji is an archipelago located in the South Pacific Ocean, belonging to the subregion of Polynesia. The majority of Fiji’s population resides on its two largest islands, Viti Levu and Vanua Levu. The islands are primarily of coral atoll origin, with limited geothermal activity. How many of the above statements are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: A Statement 1 is incorrect. While Fiji has Polynesian influences, it is geographically and anthropologically part of Melanesia, not Polynesia. Oceania has three major subregions: Melanesia, Micronesia, and Polynesia. Statement 2 is correct. The two main islands, Viti Levu and Vanua Levu, are home to approximately 87% of the nation’s population. They are the economic and administrative hubs of the country. Statement 3 is incorrect. The islands of Fiji are of volcanic origin, not coral atolls. This volcanic geology is responsible for the significant geothermal activity observed on islands like Vanua Levu and Taveuni. Incorrect Solution: A Statement 1 is incorrect. While Fiji has Polynesian influences, it is geographically and anthropologically part of Melanesia, not Polynesia. Oceania has three major subregions: Melanesia, Micronesia, and Polynesia. Statement 2 is correct. The two main islands, Viti Levu and Vanua Levu, are home to approximately 87% of the nation’s population. They are the economic and administrative hubs of the country. Statement 3 is incorrect. The islands of Fiji are of volcanic origin, not coral atolls. This volcanic geology is responsible for the significant geothermal activity observed on islands like Vanua Levu and Taveuni.

#### 7. Question

Consider the following statements about the geography and demography of Fiji:

• Fiji is an archipelago located in the South Pacific Ocean, belonging to the subregion of Polynesia.

• The majority of Fiji’s population resides on its two largest islands, Viti Levu and Vanua Levu.

• The islands are primarily of coral atoll origin, with limited geothermal activity.

How many of the above statements are correct?

• (a) Only one

• (b) Only two

• (c) All three

Solution: A

• Statement 1 is incorrect. While Fiji has Polynesian influences, it is geographically and anthropologically part of Melanesia, not Polynesia. Oceania has three major subregions: Melanesia, Micronesia, and Polynesia.

• Statement 2 is correct. The two main islands, Viti Levu and Vanua Levu, are home to approximately 87% of the nation’s population. They are the economic and administrative hubs of the country.

Statement 3 is incorrect. The islands of Fiji are of volcanic origin, not coral atolls. This volcanic geology is responsible for the significant geothermal activity observed on islands like Vanua Levu and Taveuni.

Solution: A

• Question 8 of 10 8. Question 1 points Consider the following characteristics related to Invasive Alien Species (IAS): They often exhibit aggressive growth patterns and outcompete native species for essential resources. Their proliferation is frequently aided by the absence of natural predators and diseases in the new ecosystem. They can alter the chemical and physical properties of the ecosystems they invade, such as soil chemistry and hydrology. How many of the above statements are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: C Statement 1 is correct. A defining trait of IAS is their aggressive growth. They often grow faster and more densely than native flora, monopolizing resources like sunlight, water, and soil nutrients, thereby outcompeting and displacing native species. Lantana camara is a classic example in Indian forests. Statement 2 is correct. This is a key reason for their success. In their native habitats, their populations are kept in check by natural enemies (predators, herbivores, pathogens). When introduced to a new region without these controls, they can reproduce and spread unchecked, a phenomenon known as “enemy release hypothesis”. Statement 3 is correct. The impact of IAS extends beyond simple competition. They can be ‘ecosystem engineers’ that fundamentally alter their environment. For instance, some invasive plants can change soil chemistry (e.g., by fixing nitrogen), alter water cycles (hydrology), or increase the frequency and intensity of forest fires. Incorrect Solution: C Statement 1 is correct. A defining trait of IAS is their aggressive growth. They often grow faster and more densely than native flora, monopolizing resources like sunlight, water, and soil nutrients, thereby outcompeting and displacing native species. Lantana camara is a classic example in Indian forests. Statement 2 is correct. This is a key reason for their success. In their native habitats, their populations are kept in check by natural enemies (predators, herbivores, pathogens). When introduced to a new region without these controls, they can reproduce and spread unchecked, a phenomenon known as “enemy release hypothesis”. Statement 3 is correct. The impact of IAS extends beyond simple competition. They can be ‘ecosystem engineers’ that fundamentally alter their environment. For instance, some invasive plants can change soil chemistry (e.g., by fixing nitrogen), alter water cycles (hydrology), or increase the frequency and intensity of forest fires.

#### 8. Question

Consider the following characteristics related to Invasive Alien Species (IAS):

• They often exhibit aggressive growth patterns and outcompete native species for essential resources.

• Their proliferation is frequently aided by the absence of natural predators and diseases in the new ecosystem.

• They can alter the chemical and physical properties of the ecosystems they invade, such as soil chemistry and hydrology.

How many of the above statements are correct?

• (a) Only one

• (b) Only two

• (c) All three

Solution: C

• Statement 1 is correct. A defining trait of IAS is their aggressive growth. They often grow faster and more densely than native flora, monopolizing resources like sunlight, water, and soil nutrients, thereby outcompeting and displacing native species. Lantana camara is a classic example in Indian forests.

• Statement 2 is correct. This is a key reason for their success. In their native habitats, their populations are kept in check by natural enemies (predators, herbivores, pathogens). When introduced to a new region without these controls, they can reproduce and spread unchecked, a phenomenon known as “enemy release hypothesis”.

• Statement 3 is correct. The impact of IAS extends beyond simple competition. They can be ‘ecosystem engineers’ that fundamentally alter their environment. For instance, some invasive plants can change soil chemistry (e.g., by fixing nitrogen), alter water cycles (hydrology), or increase the frequency and intensity of forest fires.

Solution: C

• Question 9 of 10 9. Question 1 points The most significant public health advantage of employing Wastewater Surveillance as an epidemiological tool is its ability to: (a) Identify the exact individuals who are infected within a community. (b) Exclusively track novel viruses for which no clinical tests have been developed. (c) Replace the need for clinical testing and individual diagnosis entirely. (d) Provide a cost-effective, non-invasive, and near real-time snapshot of community-wide disease trends. Correct Solution: D Option (a) is incorrect. WBE is an anonymized, community-level tool. It detects the presence of pathogens in the collective sewage of a population but cannot trace infections back to specific individuals or households. Option (b) is incorrect. While WBE can be a powerful tool for detecting emerging or novel viruses, its application is not exclusive to them. It is widely used to track known and re-emerging pathogens like the Poliovirus, Influenza virus, and Norovirus. Option (c) is incorrect. WBE is a surveillance and early-warning tool; it complements, but does not replace, clinical testing. Clinical diagnosis is still essential for individual patient care, contact tracing, and confirming outbreaks. Option (d) is correct. This statement captures the multifaceted advantages of WBE. It is cost-effective because one sample can represent thousands of people. It is non-invasive as it does not require individual testing. Most importantly, it provides a near real-time signal of the prevalence of a pathogen across an entire community, including asymptomatic and pre-symptomatic cases, making it an excellent tool for tracking trends. Incorrect Solution: D Option (a) is incorrect. WBE is an anonymized, community-level tool. It detects the presence of pathogens in the collective sewage of a population but cannot trace infections back to specific individuals or households. Option (b) is incorrect. While WBE can be a powerful tool for detecting emerging or novel viruses, its application is not exclusive to them. It is widely used to track known and re-emerging pathogens like the Poliovirus, Influenza virus, and Norovirus. Option (c) is incorrect. WBE is a surveillance and early-warning tool; it complements, but does not replace, clinical testing. Clinical diagnosis is still essential for individual patient care, contact tracing, and confirming outbreaks. Option (d) is correct. This statement captures the multifaceted advantages of WBE. It is cost-effective because one sample can represent thousands of people. It is non-invasive as it does not require individual testing. Most importantly, it provides a near real-time signal of the prevalence of a pathogen across an entire community, including asymptomatic and pre-symptomatic cases, making it an excellent tool for tracking trends.

#### 9. Question

The most significant public health advantage of employing Wastewater Surveillance as an epidemiological tool is its ability to:

• (a) Identify the exact individuals who are infected within a community.

• (b) Exclusively track novel viruses for which no clinical tests have been developed.

• (c) Replace the need for clinical testing and individual diagnosis entirely.

• (d) Provide a cost-effective, non-invasive, and near real-time snapshot of community-wide disease trends.

Solution: D

• Option (a) is incorrect. WBE is an anonymized, community-level tool. It detects the presence of pathogens in the collective sewage of a population but cannot trace infections back to specific individuals or households.

• Option (b) is incorrect. While WBE can be a powerful tool for detecting emerging or novel viruses, its application is not exclusive to them. It is widely used to track known and re-emerging pathogens like the Poliovirus, Influenza virus, and Norovirus.

• Option (c) is incorrect. WBE is a surveillance and early-warning tool; it complements, but does not replace, clinical testing. Clinical diagnosis is still essential for individual patient care, contact tracing, and confirming outbreaks.

• Option (d) is correct. This statement captures the multifaceted advantages of WBE. It is cost-effective because one sample can represent thousands of people. It is non-invasive as it does not require individual testing. Most importantly, it provides a near real-time signal of the prevalence of a pathogen across an entire community, including asymptomatic and pre-symptomatic cases, making it an excellent tool for tracking trends.

Solution: D

• Question 10 of 10 10. Question 1 points Consider the following statements regarding the conservation challenges in Dibru–Saikhowa National Park: The grassland ecosystem is expanding due to the decline of shrubland. The park is free from anthropogenic pressures as there are no human settlements inside its boundaries. The biodiversity of the park is threatened by both native and invasive plant species. How many of the above statements are correct? (a) Only one (b) Only two (c) All three (d) None Correct Solution: A Statement 1 is incorrect. The grassland area in Dibru–Saikhowa National Park is shrinking, not expanding. This is due to the expansion of shrubland and forest degradation, which is altering the habitat of grassland-dependent species. Statement 2 is incorrect. The park faces significant anthropogenic pressure from villages located inside its boundaries. This leads to human-wildlife conflict and increased stress on the park’s resources. Statement 3 is correct. The park’s biodiversity is under threat from the growth of both native trees (like Bombax ceiba and Lagerstroemia speciosa) and invasive species (like Chromolaena, Parthenium, and Mikania). This alteration of the natural vegetation balance is a major conservation challenge, impacting the habitat of endangered species like the Bengal Florican and hog deer. Incorrect Solution: A Statement 1 is incorrect. The grassland area in Dibru–Saikhowa National Park is shrinking, not expanding. This is due to the expansion of shrubland and forest degradation, which is altering the habitat of grassland-dependent species. Statement 2 is incorrect. The park faces significant anthropogenic pressure from villages located inside its boundaries. This leads to human-wildlife conflict and increased stress on the park’s resources. Statement 3 is correct. The park’s biodiversity is under threat from the growth of both native trees (like Bombax ceiba and Lagerstroemia speciosa) and invasive species (like Chromolaena, Parthenium, and Mikania). This alteration of the natural vegetation balance is a major conservation challenge, impacting the habitat of endangered species like the Bengal Florican and hog deer.

#### 10. Question

Consider the following statements regarding the conservation challenges in Dibru–Saikhowa National Park:

• The grassland ecosystem is expanding due to the decline of shrubland.

• The park is free from anthropogenic pressures as there are no human settlements inside its boundaries.

• The biodiversity of the park is threatened by both native and invasive plant species.

How many of the above statements are correct?

• (a) Only one

• (b) Only two

• (c) All three

Solution: A

• Statement 1 is incorrect. The grassland area in Dibru–Saikhowa National Park is shrinking, not expanding. This is due to the expansion of shrubland and forest degradation, which is altering the habitat of grassland-dependent species.

• Statement 2 is incorrect. The park faces significant anthropogenic pressure from villages located inside its boundaries. This leads to human-wildlife conflict and increased stress on the park’s resources.

• Statement 3 is correct. The park’s biodiversity is under threat from the growth of both native trees (like Bombax ceiba and Lagerstroemia speciosa) and invasive species (like Chromolaena, Parthenium, and Mikania). This alteration of the natural vegetation balance is a major conservation challenge, impacting the habitat of endangered species like the Bengal Florican and hog deer.

Solution: A

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