The biological control of invasive water hyacinth in lakes is often successfully attempted using specific types of:
- Herbivorous carp fish
- Toxic chemical sprays
- Fungal aquatic pathogens
- Weevil insects
Explanation: Neochetina weevils are often used as a biological control agent because they exclusively feed on and damage water hyacinth plants.
Consider the following statements concerning the 'Edge Effect' in ecology:
1. It refers to the unique changes in population or community structures that occur at the boundary of two or more habitats.
2. It frequently results in a higher density of certain species and greater overall biodiversity in the ecotone.
3. 'Edge species' are those organisms that spend the majority of their time or thrive primarily in this transition zone.
Which of the statements given above are correct?
- 2 and 3
- 1, 2, 3
- 1 and 3
- 1 and 2
Explanation: All statements are correct. The Edge Effect describes how the boundaries between ecosystems (ecotones) often have greater biodiversity and support specialized 'edge species' that utilize resources from both adjacent habitats.
Consider the following statements regarding trophic levels:
1. A trophic level represents a functional level, not a specific biological species.
2. A single species may occupy more than one trophic level simultaneously within the same ecosystem.
Which of the statements given above is/are correct?
- 2 only
- 1 only
- Both 1 and 2
- Neither 1 nor 2
Explanation: Both statements are correct. A trophic level is a functional role (e.g., primary consumer). A single species, like a sparrow, acts as a primary consumer when eating seeds and a secondary consumer when eating insects.
Under the Wild Life (Protection) Act, 1972, the voluntary relocation of people from the 'Core' area of a Tiger Reserve provides two options for rehabilitation. What is the current standard financial compensation package (Option I) provided entirely in cash?
- â‚ą 5 lakh per family
- â‚ą 20 lakh per family
- â‚ą 15 lakh per family
- â‚ą 10 lakh per family
Explanation: The NTCA revised the voluntary relocation package from â‚ą 10 lakh to â‚ą 15 lakh per family. Beneficiaries can choose either the entire amount in cash or a rehabilitation package including land and housing of equivalent value.
With reference to Schedule IV of the WPA 1972, consider the following statements:
1. It contains species listed in the Appendices of the CITES treaty.
2. Any person possessing a live specimen of a Schedule IV species must report it to the Management Authority.
Which of the statements given above is/are correct?
- 2 only
- 1 only
- Both 1 and 2
- Neither 1 nor 2
Explanation: Schedule IV was added specifically to implement CITES. Possession of live CITES-listed specimens must be registered with the designated Management Authority.
Which Sustainable Development Goal (SDG) specifically targets universal access to affordable, reliable, and modern energy?
- SDG 7
- SDG 6
- SDG 13
- SDG 15
Explanation: SDG 7 focuses on affordable and clean energy, aiming to increase substantially the share of renewable energy in the global energy mix.
Which Elephant Reserve is located in the state of Kerala, covering parts of the southern Western Ghats?
- Mysore ER
- Anamudi ER
- Singhbhum ER
- Dandeli ER
Explanation: The Anamudi Elephant Reserve is a major conservation area in Kerala, home to a significant population of elephants.
Which of these is a synergistic stressor that often acts alongside acidification to damage coral reefs?
- Tidal shifts
- Lower salinity
- Light intensity
- Thermal stress
Explanation: Ocean warming (thermal stress) and acidification act together, often leading to more frequent and severe coral bleaching.
The CPCB guidelines mandate that the AQI data be calculated and updated for the public at what frequency?
- Once a week
- Every single day
- Every single hour
- Every single month
Explanation: The AQI is calculated and published daily to provide the public with actionable information regarding outdoor activities.
In a forest ecosystem, while the Pyramid of Numbers can be spindle-shaped, the Pyramid of Biomass is almost always:
- Horizontal
- Inverted
- Irregular
- Upright
Explanation: Even though there are fewer trees than insects, the physical mass (biomass) of the trees is far greater than the combined mass of all the insects and birds they support, keeping the biomass pyramid upright.
Which of the following best describes the process of 'Bioleaching'?
- Using plant roots to break down rock
- Using high-heat incineration for ores
- Applying chemical solvents to soil
- Using microbes to extract valuable metals
Explanation: Bioleaching uses microorganisms, typically acid-producing bacteria, to separate and extract valuable metals like copper and gold from low-grade ores.
Which national park in North India was significantly upgraded due to the efforts of ornithologist Peter Jackson?
- Rajaji Park
- Dudhwa Park
- Kalesar Park
- Sultanpur Park
Explanation: Sultanpur was declared a Waterbird Reserve and later a National Park largely due to Peter Jackson's advocacy to Prime Minister Indira Gandhi.
Which species of highly adaptable monkey is well-known for swimming and foraging for crabs in the Indian Sundarbans?
- Lion tailed macaque
- Rhesus macaque
- Hoolock gibbon
- Nilgiri langur
Explanation: Rhesus macaques in the Sundarbans have adapted to an amphibious lifestyle, heavily supplementing their diet with crabs and shellfish.
Criteria A through E are designed to be ______.
- Subjective guesses
- Optional guidelines
- Quantitative thresholds
- Qualitative descriptions
Explanation: The criteria are strictly quantitative to ensure consistency across different taxa.
The bioremediation of highly 'Halogenated Compounds' (like TCE) typically requires which sequence?
- Direct consumption by heavily aerated fungi
- Immediate exposure to highly oxygenated water
- Physical crushing followed by phytoremediation
- Anaerobic dechlorination followed by aerobic steps
Explanation: Highly chlorinated compounds resist aerobic breakdown. They must first be stripped of chlorine in an anaerobic environment before aerobic microbes can finish the degradation.
Which of the following statements provides the most accurate definition of a Dobson Unit (DU) in atmospheric science?
- It measures the specific altitude where the stratospheric ozone concentration reaches its absolute peak.
- It represents the total number of ozone molecules contained within a vertical column of the atmosphere.
- It quantifies the amount of tropospheric ozone generated directly by terrestrial vehicular emissions.
- It calculates the precise daily rate at which chlorofluorocarbons destroy available ozone molecules.
Explanation: A Dobson Unit is the standard measure of total ozone in the atmosphere. One DU refers to a layer of ozone that would be 0.01 mm thick under standard temperature and pressure at the Earth's surface.
The Sri Venkateswara National Park is located within which of these mountain ranges?
- Erramala
- Palkonda
- Seshachalam
- Nallamala
Explanation: This park in Andhra Pradesh is situated in the Seshachalam Hills, which are famous for their Red Sanders and the Tirumala temple.
The Millennium Seed Bank Partnership is the largest global cooperative network focusing on the ex situ conservation of:
- Domestic livestock breeds
- Wild animal genes
- Threatened wild flora
- Marine reef ecosystems
Explanation: The Millennium Seed Bank in the UK coordinates globally to collect and store the seeds of threatened wild plant species (wild flora) for ex situ preservation.
Which of these toxins was famously responsible for the 'Vulture Crisis' in the Indian food web?
- Atrazine
- Endosulfan
- Glyphosate
- Diclofenac
Explanation: Vultures died of renal failure after eating carcasses of cattle treated with the anti-inflammatory drug Diclofenac.
Which major greenhouse gas has the shortest atmospheric lifetime, lasting only about a decade before degrading?
- Nitrous oxide
- Carbon dioxide
- Sulfur hexafluoride
- Methane gas
Explanation: Methane has a relatively short atmospheric lifespan of about 12 years, but it is highly efficient at trapping radiation while it remains.
The 'Badalkhol-Tamor Pingla' Elephant Reserve is a newly notified site in which state?
- Chhattisgarh
- Assam
- Goa
- Bihar
Explanation: Notified in 2011, this ER in Chhattisgarh is part of a larger landscape aimed at reducing human-elephant conflict.
The endemic flora of the Andaman islands, often grouped with Indo-Burma, shows profound biogeographical affinities with:
- Myanmar mainland
- Western Ghats
- Central Asia
- Sub Saharan Africa
Explanation: The Andaman Islands share a deeply interconnected geological and botanical history with the neighboring mainland of Myanmar.
Which of the following criteria provides the legal justification for the NTCA and NBWL to approve the 'de-notification' of a previously established Tiger Reserve?
- When a highly lucrative sub-surface mineral deposit is discovered within the buffer zone.
- Only in public interest, with the approval of the NTCA and the National Board for Wildlife.
- When the tiger population naturally migrates entirely to a neighboring state's reserve.
- De-notification of a Tiger Reserve is constitutionally impossible under any circumstances.
Explanation: Section 38W of the WPA 1972 allows for the de-notification of a tiger reserve, but it strictly requires that such a move must be 'in public interest' and backed by the approval of both the NTCA and the NBWL.
Which elusive prey of the Snow Leopard is primarily conserved in the high-altitude Pin Valley National Park?
- Bharal Blue Sheep
- Musk Deer
- Himalayan Tahr
- Siberian Ibex
Explanation: Pin Valley National Park in Himachal Pradesh is specifically managed to protect its robust population of Siberian Ibex, the primary prey for snow leopards.
Consider the following environmental remediation techniques:
1. Biosparging
2. Landfarming
3. Bioventing
4. Biopiles
Which of the above are considered 'In-situ' bioremediation techniques?
- 2 and 4 only
- 1, 2 and 3 only
- 1, 3 and 4 only
- 1 and 3 only
Explanation: Biosparging and bioventing are in-situ (treating soil/water in place without excavation). Landfarming and biopiles require excavating the contaminated soil and moving it, making them ex-situ techniques.
Which document provides the specific standards for applying Red List criteria at sub-global levels?
- National Codes
- Regional Statutes
- IUCN Guidelines
- Country Annexes
Explanation: IUCN provides 'Guidelines for Application of IUCN Red List Criteria at Regional and National Levels'.
Moving a locally extinct species from a zoo back into its historical natural protected habitat is termed:
- Complete habitat destruction
- Species reintroduction
- Culling
- Deforestation
Explanation: Species reintroduction bridges ex situ and in situ conservation by breeding animals in captivity and releasing them into protected wild habitats.
The 'Right of Passage' report, which identifies 101 elephant corridors in India, is published by:
- The NITI
- The NTCA
- The NBWL
- The WTI
Explanation: The Wildlife Trust of India (WTI), in collaboration with Project Elephant, produced the 'Right of Passage' report.
The rate of decomposition in a food web is significantly slower if the detritus is rich in:
- Lignin and Chitin
- Water and Oxygen
- Sugar and Starch
- Nitrogen and Iron
Explanation: Chemical composition affects decomposition; substances like lignin are physically tough and chemically complex to break down.
Regarding the harvesting of Non-Timber Forest Products (NTFPs) in sacred groves, consider the following statements:
1. The collection of NTFPs like wild honey or medicinal roots is traditionally regulated by strict customary laws to prevent over-extraction.
2. Local Shamans and Vaidyas (healers) utilize highly destructive industrial machinery to harvest medicinal plants from the groves.
3. These traditional, sustainable harvesting practices ensure that the reproductive capability of the rare endemic flora is not critically compromised.
Which of the statements given above are correct?
- 2 and 3
- 1, 2, 3
- 1 and 3
- 1 and 2
Explanation: Statement 2 is incorrect. Indigenous healers (Vaidyas) view the plants as sacred and harvest them manually using precise, ritualistic, and highly sustainable methods to ensure the plant species survives and regenerates.
Ocean acidification, a direct consequence of rising CO2, specifically reduces the availability of which crucial ion for marine life?
- Calcium ion
- Chloride ion
- Carbonate ion
- Sodium ion
Explanation: As the ocean absorbs CO2, it becomes more acidic, depleting carbonate ions that corals and mollusks need to build their shells.
Section 3 of the FCA empowers the Central Government to constitute which committee to advise on forest conservation?
- Empowered Committee
- Advisory Committee
- National Board
- Steering Committee
Explanation: Section 3 mandates the constitution of an Advisory Committee to evaluate proposals seeking approval for the diversion of forest land.
Consider the following statements regarding the surrender of captive animals or animal articles:
1. A person surrendering a Schedule I animal article receives financial compensation from the state.
2. Once surrendered, the item or animal becomes the property of the State Government.
Which of the statements given above is/are correct?
- 2 only
- 1 only
- Both 1 and 2
- Neither 1 nor 2
Explanation: Statement 1 is incorrect. The newly inserted Section 39A explicitly states that no compensation shall be payable to a person who voluntarily surrenders a captive animal or animal article.
Consider the following statements regarding 'Carbon Capture, Utilization, and Storage' (CCUS) in the context of carbon markets:
1. Carbon credits can be generated by CCUS projects if they permanently sequester CO2 that would have otherwise entered the atmosphere.
2. Enhanced Oil Recovery (EOR) is a utilization method where captured CO2 is injected into depleting oil fields to increase oil extraction.
Which of the statements given above is/are correct?
- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
Explanation: Both statements are correct. CCUS generates credits if additionality and permanence are proven. EOR uses captured CO2 to push out more oil from old wells, which creates complex carbon accounting challenges.
Under the 2006 amendment to the Wild Life (Protection) Act, 1972, what is the enhanced penal consequence for a first-time conviction related to hunting inside a designated Tiger Reserve?
- Imprisonment for not less than three years, extending to seven years, and a fine of up to â‚ą 2 lakh.
- Imprisonment for life along with the complete confiscation of all ancestral property.
- Imprisonment for exactly ten years and a mandatory fine of precisely â‚ą 5 lakh.
- A simple monetary fine of â‚ą 50,000 without any mandatory custodial sentence.
Explanation: Section 51 of the WPA was amended in 2006 to provide enhanced penalties for offenses within a Tiger Reserve, imposing a minimum 3-year term (up to 7 years) and fines ranging from â‚ą 50,000 to â‚ą 2 lakh for a first offense.
In the context of corporate carbon accounting under the Greenhouse Gas (GHG) Protocol, 'Scope 3' emissions refer to:
- Value chain indirect emissions
- Permanently sequestered emissions
- Purchased electricity emissions
- Direct manufacturing emissions
Explanation: Scope 1 covers direct emissions from owned sources. Scope 2 covers indirect emissions from purchased electricity. Scope 3 encompasses all other indirect emissions in the value chain, including business travel, purchased goods, and product use.
Consider the following statements about the National Institute of Animal Welfare (NIAW):
1. It functions as a subordinate institutional office under the Ministry of Fisheries, Animal Husbandry and Dairying.
2. It is situated on the same physical campus as the Animal Welfare Board of India headquarters in Ballabhgarh, Haryana.
3. It designs and offers specialized training programs for members of Institutional Animal Ethics Committees (IAEC).
Which of the statements given above are correct?
- 1, 2, 3
- 1 and 2
- 1 and 3
- 2 and 3
Explanation: All statements are correct. The NIAW is the educational and training arm of the government concerning animal welfare, located alongside the AWBI in Haryana, and provides vital training to stakeholders including IAEC members.
The continuous, low-level ambient noise prevalent in highly congested urban environments is scientifically referred to as:
- Impulsive noise
- Background noise
- Transient noise
- Sonic boom
Explanation: Background noise (or ambient noise) is the all-encompassing, continuous hum in a given environment, composed of sound from many distant sources.
Consider the following statements regarding evolutionary dynamics within ecotones:
1. Ecotones frequently act as centers for parapatric speciation due to the presence of divergent selection pressures.
2. Populations residing in ecotones often possess unique genetic adaptations compared to populations deep within the core.
Which of the statements given above is/are correct?
- 1 only
- 2 only
- Neither 1 nor 2
- Both 1 and 2
Explanation: Ecotones are dynamic evolutionary hotspots. The shifting environmental gradients create strong natural selection pressures, fostering unique genetic traits, hybridization, and potentially speciation.
Which expert body formulated the 'Roadmap for Ethanol Blending in India 2020-25'?
- Kasturirangan team
- Swaminathan group
- NITI Aayog panel
- Kelkar task force
Explanation: NITI Aayog released this comprehensive roadmap to guide the phased rollout of E10 and E20 across the country.
Consider the following statements regarding the Pyramid of Numbers in a parasitic food chain:
1. It is characterized by a very broad base of primary producers.
2. The number of individuals increases at each successive higher trophic level.
Which of the statements given above is/are correct?
- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
Explanation: Statement 1 is incorrect because a parasitic pyramid often starts with a single tree. Statement 2 is correct; in a parasitic chain (e.g., Tree -> Birds -> Lice -> Bacteria), the number of individuals increases significantly at each higher level, resulting in an inverted shape.
Which institution is responsible for the national-level ecological monitoring of tigers and conflict mapping in India?
- The BSI
- The WII
- The IIFM
- The FRI
Explanation: The Wildlife Institute of India (WII), Dehradun, is the premier research body that conducts the All India Tiger Estimation and conflict studies.
Regarding the ecological process of Soil Conservation in sacred groves, consider the following statements:
1. The undisturbed soil in these groves completely prevents the natural biological processes of nutrient cycling from occurring.
2. The dense root networks within sacred groves effectively bind the earth, preventing severe soil erosion during heavy monsoons.
3. Thick leaf litter on the grove floor drastically reduces surface runoff velocity and actively promotes groundwater percolation.
Which of the statements given above are correct?
- 2 and 3
- 1 and 3
- 1 and 2
- 1, 2, 3
Explanation: Statement 1 is incorrect. Undisturbed soil in a sacred grove is exactly what *facilitates* natural nutrient cycling. A healthy population of detritivores and microbes rapidly breaks down leaf litter, returning rich nutrients directly to the soil.
What is the typical lifespan of an Asian Elephant in the wild under ideal conditions?
- 40 years
- 90 years
- 70 years
- 50 years
Explanation: Asian elephants are long-lived animals, often reaching 60 to 70 years of age in the wild.
Which specific global hotspot includes the biologically rich but highly threatened Irrawaddy river basin?
- Sundaland ecosystem
- Indo Burma hotspot
- Eastern Himalayas
- Western Ghats
Explanation: The vast Irrawaddy river basin in Myanmar is a core ecological component of the highly threatened Indo-Burma biodiversity hotspot.
Under the Eco Mark scheme, products must also strictly meet standard quality requirements set by the:
- ISO benchmarks
- International standards
- Indian Standards
- European norms
Explanation: Products must meet the rigorous quality parameters of Indian Standards (IS) in addition to environmental criteria to get the Eco Mark.
Fecal sludge and septage management (FSSM) is a critical component of urban sanitation. Untreated septage is highly polluting primarily because it has an extremely high:
- Level of pure synthetic microplastics.
- Biological Oxygen Demand.
- Radioactive half-life.
- Concentration of dissolved ozone.
Explanation: Untreated septage is concentrated organic waste. It has an extremely high BOD, meaning if released into water bodies, microbes consuming the waste will rapidly deplete the dissolved oxygen, killing aquatic life.
What happens to the remaining 90% of energy that is NOT transferred to the next trophic level according to Lindeman's rule?
- It is permanently stored within the cellular DNA of the organism.
- It is lost primarily as heat during metabolic processes and through undigested waste.
- It is transported directly back to the primary producers via saprophytic networks.
- It is immediately converted into highly stable inorganic soil nutrients.
Explanation: A massive portion of energy is utilized by organisms for their own metabolic processes (respiration, movement, reproduction) and is subsequently lost to the environment as heat, while some is lost as undigested fecal waste.
In the context of the Montreal Protocol, what is the primary function of the 'Multilateral Fund'?
- To completely finance the space-based satellite monitoring of the Antarctic ozone hole.
- To fund the research and development of commercial supersonic aviation technologies.
- To directly compensate individuals suffering from skin cancer in high-latitude regions.
- To provide financial and technical assistance to developing countries to comply with ODS phase-out targets.
Explanation: The Multilateral Fund for the Implementation of the Montreal Protocol was established to assist Article 5 (developing) countries in meeting their obligations to phase out the use of ozone-depleting substances.
Which type of aerial roots grow downward from the branches of some mangroves, anchoring them firmly in unstable mud?
- Buttress roots
- Stilt roots
- Pneumatophores
- Floating roots
Explanation: Stilt or prop roots loop out from the main stem and branches, providing crucial structural stability against strong tidal currents.
Which specific type of mangrove root emerges horizontally from the ground, loops up into the air, and re-enters the mud like a bent leg?
- Buttress roots
- Pneumatophores
- Knee roots
- Stilt roots
Explanation: Species like Bruguiera develop characteristic knee roots that loop above the soil surface to facilitate gas exchange before diving back down for stability.
Second-generation biofuels are primarily derived from which non-edible type of biomass?
- Algal biomass
- Food grains
- Lignocellulosic
- Genetically altered
Explanation: Lignocellulosic biomass includes agricultural residues like wheat straw and corn stover, which do not compete with food crops.
Consider the following statements regarding nutrient cycling during ecological succession:
1. In early pioneer stages, biogeochemical cycles are highly closed and conservative.
2. In mature climax stages, ecosystems exhibit a strong capacity to entrap and hold nutrients.
Which of the statements given above is/are correct?
- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
Explanation: Statement 1 is incorrect. In early succession, nutrient cycles are 'open' and leaky, meaning nutrients are easily lost through runoff. As biomass builds into a climax community, cycles become 'closed' and highly retentive.
In HWC management, 'Ex-gratia' payments provided to victims are technically defined as:
- Legal compensation
- Interim relief
- Penalty charges
- Mandatory insurance
Explanation: Ex-gratia is a voluntary payment by the government to provide immediate help, rather than a legally admitted liability or compensation.
Which of the following are EXCLUDED when counting 'Mature Individuals'?
- Non-reproductive juveniles
- Reproductive adults
- Resident males
- Breeding females
Explanation: Juveniles and other individuals incapable of reproducing are excluded from the count.
Regarding the ecological role of 'Predation', consider the following statements:
1. Predation structurally weakens ecosystems by rapidly driving all targeted prey species into absolute extinction.
2. It acts as a critical, major conduit for energy transfer across consecutive trophic levels in a biological community.
3. Prey species often evolve complex defensive mechanisms, such as cryptic camouflage or chemical toxins, to survive.
Which of the statements given above are correct?
- 1, 2, 3
- 1 and 3
- 1 and 2
- 2 and 3
Explanation: Statement 1 is incorrect. Predation stabilizes ecosystems. By culling the sick, weak, and old, predators prevent prey populations from overgrazing and destroying the habitat, ensuring the long-term survival of the ecosystem.
In the Pyramid of Energy, the width of the base is determined by:
- The total number of herbivores in the ecosystem.
- The rate of decomposition by saprophytic bacteria.
- The average weight of the apex predator species.
- The amount of solar energy fixed by autotrophs.
Explanation: The base of the energy pyramid represents the energy captured by primary producers through photosynthesis, which sets the energy budget for the rest of the ecosystem.
Within the framework of carbon pricing, what is meant by the 'Waterbed Effect' in a Cap-and-Trade system?
- Shifting emissions under a fixed cap
- Expanding oceanic carbon capacities
- Taxing maritime transport heavily
- Devaluing renewable energy credits
Explanation: The waterbed effect occurs when overlapping policies reduce emissions in one area, but because the overall cap remains unchanged, those unused allowances are simply sold to other entities who emit them elsewhere under the same cap.
Which of the following river systems forms the primary estuarine ecosystem that supports the Gahirmatha Marine Sanctuary?
- The Narmada and Tapi rivers.
- The Mahanadi and Subarnarekha rivers.
- The Brahmani and Baitarani rivers.
- The Godavari and Krishna rivers.
Explanation: The Gahirmatha beach and the adjacent Bhitarkanika mangrove ecosystem are primarily formed by the deltaic network of the Brahmani and Baitarani rivers in Odisha.
Consider the following statements concerning the AWBI's recognition of Animal Welfare Organizations (AWOs):
1. An NGO must be legally registered under the Societies Registration Act, Indian Trusts Act, or a similar law to apply for AWBI recognition.
2. Once granted, AWBI recognition acts as a permanent accreditation that cannot be suspended or revoked under any circumstances.
3. Attaining recognized status makes an AWO eligible to apply for various financial assistance schemes administered by the Board.
Which of the statements given above are correct?
- 1, 2, 3
- 2 and 3
- 1 and 2
- 1 and 3
Explanation: Statement 2 is incorrect. AWBI recognition is not permanent. The Board retains the authority to inspect AWOs and can suspend or revoke recognition if the organization is found violating animal welfare laws or misusing funds.