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Environment, Ecology and Biodiversity

139 questions

All types139Multiple choice73Multiple select24Matching26Ordering16
Question 81Question →

With reference to biodiversity conservation strategies in India, consider the following statements:

1. Sacred Groves and Community Reserves are examples of in-situ conservation strategies that preserve biological diversity within its natural habitat.
2. Cryopreservation of gametes and micropropagation techniques represent ex-situ conservation methods carried out under controlled artificial conditions.
3. In a UNESCO-designated Biosphere Reserve, limited human activities such as research, environmental education, and managed tourism are strictly permitted within the Core Zone, while the Buffer Zone remains completely undisturbed by any human intervention.

Which of the statements given above is/are correct?

Show answer & explanation

Answer: 1 and 2 only

Answer

Statements 1 and 2 are correct, while Statement 3 is incorrect.
In-situ conservation protects wild species within their native ecosystems (such as Sacred Groves, National Parks, and Community Reserves). Ex-situ conservation preserves genetic resources away from their natural environment (such as Cryopreservation, Seed Banks, and Botanical Gardens). In Biosphere Reserve architecture, human activities like educational training and managed tourism occur in the Buffer Zone, while the Core Zone is kept free from human interference.

Step-by-Step Solution

1
Evaluate Statement 1 regarding Sacred Groves and Community Reserves.
Statement 1 is correct.
In-situ conservation refers to conserving species within their natural ecosystems and habitats. Sacred Groves (protected forest patches preserved by traditional communities) and Community Reserves legally protected under the Wildlife Protection Act (1972) are classic examples of in-situ conservation.
2
Evaluate Statement 2 regarding Cryopreservation and Micropropagation.
Statement 2 is correct.
Ex-situ conservation involves the preservation of biological diversity components outside their natural habitats. Cryopreservation (preserving cells/gametes at liquid nitrogen temperature of -196°C) and micropropagation (in vitro tissue culture) take place in off-site laboratory setups.
3
Evaluate Statement 3 regarding Biosphere Reserve zoning framework.
Statement 3 is incorrect.
According to UNESCO Man and the Biosphere (MAB) guidelines, a Biosphere Reserve comprises three zones: Core Zone (strictly protected, devoted to ecosystem preservation with minimal non-destructive scientific research permitted), Buffer Zone (surrounds the core, used for activities compatible with sound ecological practices such as research, education, and limited tourism), and Transition Zone (outermost area where local communities, management agencies, and scientists cooperate for sustainable resource management).

Key Concept

Distinction between In-situ and Ex-situ Conservation Strategies and Biosphere Reserve Zoning
Estimated Time:1m 30s
Question 82Question →

Consider the following statements regarding statutory bodies and institutional frameworks under environmental legislation in India:

Statement I: The Genetic Engineering Appraisal Committee (GEAC) is a statutory body constituted under the Biological Diversity Act, 2002.
Statement II: The National Biodiversity Authority (NBA) is a statutory autonomous body established under the Biological Diversity Act, 2002, with its headquarters located in Chennai.
Statement III: Under the Compensatory Afforestation Fund Act, 2016, the National Compensatory Afforestation Fund receives 90% of the funds collected, while the State Compensatory Afforestation Funds receive the remaining 10%.

Which of the statements given above is/are correct?

Show answer & explanation

Answer: Statement II only

Answer

Statement II only is correct.
Statement II is factually correct as the National Biodiversity Authority (NBA) was set up in 2003 under the Biological Diversity Act, 2002 with headquarters in Chennai. Statement I is incorrect because GEAC functions under the Environment (Protection) Act, 1986. Statement III is incorrect because the State Compensatory Afforestation Funds receive 90% of the collected funds, while the National Fund receives only 10%.

Step-by-Step Solution

1
Evaluate Statement I regarding the statutory origin of GEAC.
Statement I is incorrect.
The Genetic Engineering Appraisal Committee (GEAC) was established under the Environment (Protection) Act, 1986 (specifically under the Rules for the Manufacture, Use, Import, Export and Storage of Hazardous Microorganisms/Genetically Engineered Organisms or Cells, 1989), not under the Biological Diversity Act, 2002.
2
Evaluate Statement II regarding the National Biodiversity Authority (NBA).
Statement II is correct.
The National Biodiversity Authority (NBA) was established in 2003 as a statutory autonomous body to implement the Biological Diversity Act, 2002, and its head office is situated in Chennai, Tamil Nadu.
3
Evaluate Statement III regarding the fund allocation under the Compensatory Afforestation Fund Act, 2016.
Statement III is incorrect.
According to the Compensatory Afforestation Fund Act, 2016, 90% of the funds collected are transferred to the State Compensatory Afforestation Fund (State CAMPA), while only 10% are retained in the National Compensatory Afforestation Fund (National CAMPA).

Key Concept

Statutory Bodies and Financial Provisions under Indian Environmental Acts (EPA 1986, Biological Diversity Act 2002, CAMPA Act 2016)
Question 83Question →

Arrange the following ecological levels of organization in ascending order, starting from the most specific individual unit to the broadest ecological scale.

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Answer

The correct sequence in ascending order is: Organism → Population → Community → Ecosystem.
The ecological organizational hierarchy progresses naturally from specific to broad scales. An individual organism is the base unit. Groupings of the same organism species form a population. Diverse populations of different species coexisting in an area form a biological community. Finally, when this living community interacts with non-living (abiotic) components, it constitutes an ecosystem.

Step-by-Step Solution

1
Identify the most basic individual ecological unit
Organism is the single living entity.
The individual organism is the fundamental functional unit at the lowest level of ecological hierarchy.
2
Identify the level comprising individuals of the same species
Population consists of multiple organisms of a single species.
Organisms of the same species residing together form a population.
3
Identify the interaction level of multiple species
Community includes all populations of distinct species in a defined area.
Biological communities represent the assemblage of multi-species living populations.
4
Incorporate non-living physical components into the system
Ecosystem combines biological communities with their abiotic environment.
An ecosystem encompasses both biotic communities and non-living physical factors such as climate, soil, and water.

Key Concept

Levels of Ecological Organization
Question 84Question →

Biodiversity conservation strategies are broadly divided into in-situ (on-site) and ex-situ (off-site) approaches depending on whether protection is provided within natural habitats or in human-managed facilities. Which of the following statements regarding these conservation mechanisms are correct?

Select all that apply

Show answer & explanation

Answer: Cryopreservation of gametes at ultra-low temperatures and the maintenance of seed banks serve as ex-situ conservation methods that preserve genetic material outside natural habitats.; Sacred groves represent traditional, community-led in-situ conservation areas where intact forest patches are protected along with their native ecological processes.; In-situ conservation frameworks, such as Biosphere Reserves and National Parks, allow protected populations to continue evolving under natural selective pressures.

Answer

The correct statements are those identifying cryopreservation and seed banks as ex-situ genetic preservation, sacred groves as community-based in-situ protection, and Biosphere Reserves/National Parks as in-situ systems supporting natural evolutionary processes.
In-situ conservation protects species in their natural habitats (e.g., sacred groves, national parks, biosphere reserves) where natural selection and evolutionary processes continue. Ex-situ conservation safeguards components of biological diversity outside their natural habitats (e.g., seed banks, cryopreservation, botanical gardens, zoos).

Step-by-Step Solution

1
Analyze the scope of ex-situ conservation methods.
Cryopreservation (storing tissues/gametes in liquid nitrogen at −196∘C-196^\circ\text{C}) and seed banks store genetic material off-site under artificial conditions, confirming their classification as ex-situ.
Off-site preservation isolates genetic material from natural environmental threats for long-term storage.
2
Evaluate traditional community conservation practices like sacred groves.
Sacred groves protect existing natural forest ecosystems on-site without moving organisms, making them in-situ conservation sites.
In-situ conservation includes natural habitats protected by legal or socio-cultural community norms.
3
Differentiate artificial live collections from in-situ conservation.
Botanical gardens and zoological parks place species outside their native habitats in artificial enclosures, misclassifying them if labeled as in-situ.
The key criterion for ex-situ status is the transfer of organisms out of their natural ecological niche into human-maintained settings.
4
Examine the dynamic ecological benefit of in-situ reserves.
Designations like National Parks and Biosphere Reserves allow species to remain subject to ongoing environmental pressures and natural selection.
In-situ sites preserve whole ecosystems and evolutionary processes, unlike static ex-situ repositories.

Key Concept

Classification and biological mechanics of in-situ vs. ex-situ biodiversity conservation strategies.
Question 85Question →

Match the biodiversity hotspots overlapping Indian territory (List-I) with their precise geographical coverage and characteristic endemic fauna (List-II):

Click a left item, then click its matching right item

Items

Western Ghats Hotspot
Indo-Burma Hotspot
Sundaland Hotspot
Himalayan Hotspot

Matches

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Answer

The correct matching pairs Western Ghats Hotspot with the western peninsular mountain chain (Lion-tailed Macaque and Nilgiri Tahr); Indo-Burma Hotspot with Northeast India south of the Brahmaputra River (Sangai deer); Sundaland Hotspot with the Nicobar group of islands (Nicobar Tree Shrew); and Himalayan Hotspot with the high-altitude montane zone of North and Northeast India (Namdapha Flying Squirrel).
The global biodiversity hotspots overlapping India possess precise biogeographical limits and signature endemic species: Western Ghats (peninsular mountain range with Lion-tailed Macaque), Indo-Burma (Northeast India south of Brahmaputra with Sangai deer), Sundaland (Nicobar Islands with Nicobar Tree Shrew), and Himalayas (montane North/Northeast India with Namdapha Flying Squirrel).

Step-by-Step Solution

1
Analyze the spatial extent and endemic species of peninsular Western India.
The Western Ghats Hotspot corresponds to the western peninsular mountain chain hosting the Lion-tailed Macaque.
The Western Ghats form a continuous hill chain along peninsular India with exceptionally high endemism.
2
Delineate the Indian boundary of the Indo-Burma Hotspot.
Indo-Burma pairs with Northeast India south of the Brahmaputra River, including Manipur where the Sangai is endemic.
The Brahmaputra River serves as a major biogeographical dividing line between the Himalayan and Indo-Burma hotspots.
3
Identify the specific Indian island territory included within Sundaland.
Sundaland pairs exclusively with the Nicobar group of islands, home to the endemic Nicobar Tree Shrew.
While the Andaman Islands belong to Indo-Burma, the Nicobar Islands form the northwestern boundary of the Indo-Malayan Sundaland hotspot.
4
Map the Himalayan Hotspot to its spatial boundary and endemic fauna.
Himalayan Hotspot pairs with the northern and northeastern high-altitude montane zone hosting the Namdapha Flying Squirrel.
The Himalayan mountain chain covers the high-elevation ecosystems of northern India and areas north of the Brahmaputra.

Key Concept

Geographical boundaries and signature endemic fauna of Indian Biodiversity Hotspots
Question 86Question →

Conservation of biological diversity can take place either within the natural ecosystem or in human-controlled artificial settings. Which of the following conservation methods is an example of an ex-situ conservation strategy?

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Answer: Seed banks

Answer

Seed banks represent an ex-situ conservation strategy.
Seed banks preserve genetic material (seeds) in controlled artificial environments off-site, making them a standard ex-situ conservation method.

Step-by-Step Solution

1
Recall the definitions of in-situ and ex-situ biodiversity conservation.
In-situ conservation involves protecting species within their natural habitats. Ex-situ conservation involves protecting species outside their natural habitats in artificial environments.
Categorization depends strictly on whether the conservation site is natural (on-site) or artificial/off-site.
2
Classify the given options based on conservation location.
National parks, biosphere reserves, and sacred groves preserve plants and animals within their native habitats (in-situ). Seed banks collect and store plant germplasm off-site in refrigerated repositories (ex-situ).
Seed banks operate in controlled facilities separate from natural habitats.

Key Concept

Ex-situ conservation refers to off-site preservation techniques, such as seed banks, botanical gardens, zoological parks, and cryopreservation.
Question 87Question →

Which of the following environmental impacts are directly associated with the depletion of the stratospheric ozone layer? Select all correct options.

Select all that apply

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Answer: Increased exposure to harmful solar UV-B radiation leading to higher rates of skin cancer and cataracts; Inhibition of biological productivity and photosynthetic activity in marine phytoplankton

Answer

The correct options are those describing increased skin cancer and cataract rates from UV-B radiation, and the disruption of marine phytoplankton productivity.
The stratospheric ozone layer filters solar UV-B radiation. Its depletion results in enhanced ground-level UV-B intensity, causing human health risks like skin cancer and damage to aquatic ecosystems by harming photosynthetic phytoplankton.

Step-by-Step Solution

1
Identify the primary protective role of stratospheric ozone.
Stratospheric ozone acts as a shield absorbing harmful ultraviolet-B (UV-B) solar radiation.
Understanding ozone function clarifies the consequences when the shield is depleted.
2
Evaluate biological and ecological consequences of increased UV-B reaching Earth.
Higher UV-B exposure leads to physiological damage in humans (skin cancers, cataracts) and damages primary producers like phytoplankton in marine environments.
Phytoplankton are sensitive to UV radiation, which impairs their photosynthetic capability.

Key Concept

Impacts of Stratospheric Ozone Depletion
Question 88Question →

Which of the following ecological terms refers to the physical area or environment inhabited by a specific organism, encompassing all the abiotic physical factors of that location?

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Answer: Habitat

Answer

Habitat is the term that describes the specific physical locality or environmental address inhabited by an organism.
Habitat is defined as the exact physical environment or spatial location where an organism lives, including all surrounding abiotic factors such as soil, climate, water, and sunlight.

Step-by-Step Solution

1
Identify the key focus of the question.
The question asks for the term representing the physical location where an organism lives along with its abiotic surroundings.
Basic ecological terminology distinguishes between physical space (habitat) and functional role (niche).
2
Compare basic ecological definitions.
Habitat represents the 'address' of an organism. Niche refers to its 'profession' or functional role. Ecotone is a boundary region between ecosystems, and Biome is a macro-regional unit.
Matching structural definitions ensures accurate identification of basic ecosystem concepts.

Key Concept

Habitat versus Ecological Niche and Ecosystem Structural Units
Question 89Question →

Consider the following statements regarding the Minamata Convention on Mercury:

1. It is a legally binding multilateral treaty designed to protect human health and the environment from anthropogenic emissions and releases of mercury and mercury compounds.
2. It permits open-ended timelines for member nations without establishing specific phase-out target dates for the manufacture, import, and export of mercury-added products.

Which of the statements given above is/are correct?

Show answer & explanation

Answer: 1 only

Answer

1 only
Statement 1 is accurate because the Minamata Convention on Mercury is a legally binding multilateral agreement under UNEP that targets the reduction of toxic mercury emissions. Statement 2 is false because Article 4 and Annex A of the convention stipulate concrete phase-out timelines for a wide range of mercury-added manufacture and trade products.

Step-by-Step Solution

1
Evaluate Statement 1 regarding the regulatory mandate of the Minamata Convention.
The Minamata Convention on Mercury was adopted in 2013 and entered into force in 2017 as a legally binding treaty addressing anthropogenic mercury pollution across its entire lifecycle.
To verify the legal nature and primary target of the convention.
2
Evaluate Statement 2 regarding phase-out commitments for mercury-added products.
The treaty explicitly listed phase-out dates (e.g., 2020 target for specified batteries, switches, CFL lamps, and cosmetics) rather than allowing open-ended schedules.
To verify whether product phase-out timelines are binding and specific.
3
Synthesize results to select the correct combination.
Statement 1 is correct while Statement 2 is incorrect, making '1 only' the correct option.
Only Statement 1 accurately captures the legal principles of the treaty.

Key Concept

Minamata Convention on Mercury: Scope and Regulatory Phase-out Controls
Estimated Time:1m 0s
Question 90Question →

Match the biodiversity conservation mechanisms and repositories in List-I with their corresponding conservation framework and technical attributes in List-II:

Click a left item, then click its matching right item

Items

Cryopreservation & Seed Storage Banks
Sacred Groves (e.g., Kavu / Orans)
National Parks Core Zones
Field Gene Banks & Arboreta

Matches

Show answer & explanation

Answer

Cryopreservation & Seed Storage Banks pairs with Ex-situ conservation utilizing liquid nitrogen (−196∘C -196^\circ \text{C} ); Sacred Groves pairs with In-situ community-led preservation; National Parks Core Zones pairs with In-situ statutory protection under the Wildlife Protection Act; Field Gene Banks & Arboreta pairs with Ex-situ living collections of plant genetic resources.
In-situ conservation protects species, populations, and ecosystems within their natural habitats (such as National Parks and Sacred Groves). Ex-situ conservation preserves components of biological diversity outside their natural habitats (such as Cryopreservation seed banks and Field Gene Banks).

Step-by-Step Solution

1
Differentiate between in-situ (on-site natural habitat) and ex-situ (off-site artificial facility) strategies.
Identified National Parks and Sacred Groves as in-situ strategies, while Cryopreservation/Seed Banks and Field Gene Banks are ex-situ strategies.
In-situ conserves biodiversity within natural habitats, whereas ex-situ removes organisms or germplasm from their natural habitats to artificial repositories.
2
Analyze Cryopreservation & Seed Storage Banks.
Matches liquid nitrogen cryopreservation (−196∘C -196^\circ \text{C} ) off-site germplasm preservation.
Cryopreservation stores biological samples at sub-zero temperatures off-site to preserve viability indefinitely.
3
Analyze Sacred Groves.
Matches community-led preservation of natural vegetation based on cultural taboos.
Sacred groves protect patches of natural forest on-site using traditional community practices.
4
Analyze National Parks Core Zones and Field Gene Banks.
National Parks match highest statutory legal protection in-situ; Field Gene Banks match live ex-situ plant collections for recalcitrant seeds.
National parks maintain natural ecosystems under statutory acts, while field gene banks maintain live growing plants outside natural ranges.

Key Concept

Classification of In-situ versus Ex-situ Biodiversity Conservation Strategies
Question 91Question →

Environmental Impact Assessment (EIA) in India follows a structured regulatory process under the EIA Notification, 2006. Arrange the following key stages of the EIA process in the correct chronological order from start to finish:

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Answer

The correct chronological sequence of the EIA 2006 process is: Screening → Scoping → Public Consultation → Appraisal.
According to the EIA Notification 2006 issued under the Environment (Protection) Act 1986, environmental clearance for project proposals follows four sequential steps: 1) Screening (determining if Category B needs EIA study), 2) Scoping (formulating Terms of Reference by EAC/SEAC), 3) Public Consultation (conducting public hearings and gathering local inputs), and 4) Appraisal (expert review of final EIA document and public feedback to make recommendations to MoEFCC or SEIAA).

Step-by-Step Solution

1
Identify the initial regulatory classification phase.
Screening is identified as Step 1 because it categorizes projects (Category A, B1, B2) and determines if an EIA report is required.
No assessment work can begin without first determining the requirement and regulatory scope of the project.
2
Identify the phase that establishes parameters for the environmental study.
Scoping is identified as Step 2 because the EAC/SEAC formulates the Terms of Reference (ToR) based on which baseline data is collected.
Terms of Reference must be established before conducting field studies and drafting the EIA report.
3
Determine the stakeholder engagement phase.
Public Consultation is identified as Step 3 as it requires a draft EIA report prepared according to the ToR.
Public hearings require presentation of draft environmental findings to local communities to gather objections and suggestions.
4
Determine the final decision-support phase.
Appraisal is identified as Step 4, where EAC/SEAC conducts detailed scrutiny of both the final EIA report and public hearing proceedings.
Appraisal synthesizes all technical data and public input to make a final recommendation on environmental clearance.

Key Concept

Four-Stage Procedural Workflow of EIA Notification 2006
Question 92Question →

Consider the following statements regarding Biodiversity Hotspots and Endemism:

1. Norman Myers' quantitative criteria require a region to contain at least 1,500 species of endemic vascular plants and to have lost at least 70% of its primary native vegetation to be designated as a global biodiversity hotspot.
2. Neo-endemic species refer to evolutionary ancient species that were historically widespread across continents but are currently restricted to narrow ecological refugia due to past climatic shifts.
3. Among the biodiversity hotspots overlapping Indian territory, the Nicobar Islands form part of the Sundaland hotspot, whereas the Andaman Islands are included within the Indo-Burma hotspot.

Which of the statements given above is/are correct?

Show answer & explanation

Answer: 1 and 3 only

Answer

Statements 1 and 3 are correct, while Statement 2 is incorrect.
The correct answer identifies that the quantitative thresholds established by Norman Myers (1,500 endemic vascular plant species and at least 70% primary habitat loss) are accurate, and that the Nicobar Islands belong to Sundaland while the Andaman Islands belong to Indo-Burma. The second statement is incorrect because it describes palaeo-endemism rather than neo-endemism.

Step-by-Step Solution

1
Evaluate Statement 1 regarding global Biodiversity Hotspot criteria.
Statement 1 is correct.
According to Conservation International (based on Norman Myers' model), a region must meet two strict criteria: it must contain at least 1,500 species of vascular plants as endemics (>0.5% of the world's total) and it must have lost at least 70% of its original primary habitat (i.e., possess 30% or less of its original natural vegetation).
2
Evaluate Statement 2 regarding ecological and evolutionary endemism terminology.
Statement 2 is incorrect.
Phylogenetically ancient species that were once widespread but are now confined to small refugia (e.g., Ginkgo biloba or ancient conifers) are termed 'palaeo-endemics' (or relict endemics). In contrast, 'neo-endemics' are recently evolved species (often through adaptive radiation or polyploidy) that have not yet had sufficient time to expand their geographical ranges.
3
Evaluate Statement 3 regarding Indian biogeographical hotspot boundaries.
Statement 3 is correct.
India overlaps with four global biodiversity hotspots: the Himalayas, Indo-Burma, Western Ghats/Sri Lanka, and Sundaland. Biogeographically, the Nicobar archipelago belongs to the Sundaland hotspot, whereas the Andaman chain of islands falls under the Indo-Burma hotspot.

Key Concept

Hotspot Quantitative Criteria, Evolutionary Types of Endemism, and Regional Hotspot Boundaries in India
Estimated Time:2m 0s
Question 93Question →

Which of the following represents the correct chronological sequence of adoption (from earliest to latest) for these major international environmental agreements?

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Answer

The correct chronological order of adoption from earliest to latest is: CITES (1973), Basel Convention (1989), Cartagena Protocol (2000), and Nagoya Protocol (2010).
The correct sequence places CITES first (adopted in 1973), followed by the Basel Convention (adopted in 1989), then the Cartagena Protocol on Biosafety (adopted in 2000), and finally the Nagoya Protocol on Access and Benefit-Sharing (adopted in 2010).

Step-by-Step Solution

1
Determine the adoption year of CITES.
CITES was adopted in 1973 in Washington, D.C.
This is the earliest convention among the given options.
2
Determine the adoption year of the Basel Convention.
The Basel Convention was adopted in 1989.
It addresses transboundary hazardous waste and follows CITES chronologically.
3
Determine the adoption year of the Cartagena Protocol on Biosafety.
The Cartagena Protocol was adopted in 2000.
It serves as the first supplementary agreement to the Convention on Biological Diversity regarding biosafety.
4
Determine the adoption year of the Nagoya Protocol.
The Nagoya Protocol was adopted in 2010.
It is the second supplementary protocol to the CBD, adopted a decade after the Cartagena Protocol.

Key Concept

Chronology of major multilateral environmental treaties and protocols
Question 94Question →

Which of the following statements accurately describes the quantitative criteria for designating a global biodiversity hotspot and the biogeographical alignment of Indian territories within these hotspots?

Show answer & explanation

Answer: To qualify as a hotspot, a region must harbor at least 1,500 endemic species of vascular plants and have lost at least 70% of its primary native vegetation, with the Nicobar group of islands forming part of the Sundaland hotspot.

Answer

The correct option states that a hotspot must contain at least 1,500 endemic vascular plant species, have lost at least 70% of its primary vegetation, and includes the Nicobar Islands within the Sundaland hotspot.
The correct answer accurately states both quantitative criteria established by Norman Myers and Conservation International (minimum 1,500 endemic vascular plant species and maximum 30% remaining primary vegetation / 70% lost) and correctly identifies the Nicobar Islands as part of the Sundaland biodiversity hotspot.

Step-by-Step Solution

1
Identify Norman Myers' criteria for global biodiversity hotspots.
A region must contain at least 1,500 species of vascular plants as endemics (>0.5% of the global total) and must have lost at least 70% of its original primary vegetation.
These dual criteria ensure that hotspots reflect both high threat and high irreplaceable biological value.
2
Determine the biogeographical coverage of Indian hotspots.
India overlaps with four global biodiversity hotspots: Western Ghats (and Sri Lanka), Himalayas, Indo-Burma (includes Andaman Islands), and Sundaland (includes Nicobar Islands).
Distinguishing the specific island groups is essential as Andaman belongs to Indo-Burma whereas Nicobar belongs to Sundaland.
3
Evaluate the statements against these established benchmarks.
The statement specifying 1,500 endemic vascular plants, 70% primary vegetation loss, and Nicobar's inclusion under Sundaland is completely correct.
All numeric parameters and regional geographical assignments match the official conservation guidelines.

Key Concept

Biodiversity Hotspot Criteria & Regional Alignment in India
Question 95Question →

Which of the following methods are correctly classified as Ex-situ (off-site) biodiversity conservation strategies? Select all that apply.

Select all that apply

Show answer & explanation

Answer: Botanical gardens; Cryopreservation facilities; Seed banks

Answer

Botanical gardens, cryopreservation facilities, and seed banks are ex-situ conservation strategies, whereas national parks are an in-situ strategy.
Botanical gardens, cryopreservation facilities, and seed banks are all ex-situ conservation methods because organisms or their genetic materials are preserved outside their natural environments in artificial, controlled settings.

Step-by-Step Solution

1
Define In-situ and Ex-situ conservation.
In-situ conservation involves protecting species within their natural habitats. Ex-situ conservation involves conserving biological components outside their natural surroundings.
Establishing clear definitions allows proper classification of each conservation mechanism.
2
Classify each given option.
Botanical gardens, cryopreservation, and seed banks operate off-site in human-managed facilities (ex-situ). National parks protect natural habitats and wild populations on-site (in-situ).
Determining whether conservation occurs inside or outside natural boundaries reveals the correct choices.

Key Concept

Distinction between In-situ and Ex-situ Biodiversity Conservation
Question 96Question →

Which international environmental treaty, signed in 1971, provides the global legal framework dedicated specifically to the conservation and wise use of wetlands and their resources?

Show answer & explanation

Answer: Ramsar Convention

Answer

The Ramsar Convention
The Ramsar Convention on Wetlands of International Importance is an international treaty signed in 1971 that establishes national actions and international cooperation for wetland conservation and sustainable resource usage.

Step-by-Step Solution

1
Identify the primary focus of the 1971 agreement.
The Ramsar Convention, adopted in 1971 in Ramsar, Iran, specifically addresses wetland conservation.
It is the only global treaty focused exclusively on a single type of ecosystem (wetlands).

Key Concept

Ramsar Convention on Wetlands
Estimated Time:45s
Question 97Question →

Consider the following statements regarding industrial pollution control technologies and atmospheric chemical phenomena:

1. Catalytic converters fitted in automobiles utilize platinum-palladium and rhodium catalysts to reduce toxic emissions by converting unburnt hydrocarbons into CO2CO_2 and H2OH_2O, carbon monoxide into CO2CO_2, and nitric oxide into N2N_2 gas.
2. Electrostatic Precipitators (ESPs) deployed in thermal power plants remove over 99% of particulate matter by generating an electric corona that imparts a negative charge to dust particles, which are then collected on grounded plates.
3. Photochemical smog is classified as a reducing smog because it primarily consists of high concentrations of sulfur dioxide (SO2SO_2) and particulate matter formed under cold, humid weather conditions.

Which of the statements given above are correct?

Show answer & explanation

Answer: 1 and 2 only

Answer

The statements 1 and 2 only are correct.
Statements 1 and 2 accurately present the operating chemistry and physics of primary air pollution abatement systems (catalytic converters and electrostatic precipitators). Statement 3 incorrectly characterizes Photochemical smog as a reducing mixture; Photochemical smog is strongly oxidizing due to high levels of ground-level ozone and PAN generated via photochemical reactions of nitrogen oxides and hydrocarbons in warm, sunny environments.

Step-by-Step Solution

1
Analyze Statement 1 regarding catalytic converters
Statement 1 is correct. Catalytic converters use noble metals (platinum, palladium, rhodium) to oxidize hydrocarbons to CO2CO_2 and H2OH_2O, oxidize COCO to CO2CO_2, and reduce NOxNO_x to inert nitrogen gas (N2N_2).
Verifying chemical transformations induced by automotive emission abatement technologies.
2
Analyze Statement 2 regarding Electrostatic Precipitators
Statement 2 is correct. High voltage electrode wires produce a corona discharge releasing electrons, which attach to dust particles to give them a net negative charge so they can be attracted to positively charged/grounded collecting plates.
Evaluating particulate control technology efficiency and electro-physical operating principles in power plants.
3
Analyze Statement 3 regarding smog types and chemical characteristics
Statement 3 is incorrect. Photochemical smog occurs in warm, sunny climates and is an oxidizing mixture containing secondary pollutants like O3O_3, PAN, and aldehydes. Classical smog is reducing smog, dominated by SO2SO_2 and coal smoke in cold, humid climates.
Distinguishing between primary/secondary pollutant dynamics and atmospheric smog oxidation states.

Key Concept

Air Pollution Abatement Technologies and Atmospheric Photochemical Reactions
Estimated Time:1m 30s
Question 98Question →

Match the basic ecological terms in List-I with their appropriate structural descriptions in List-II:

Click a left item, then click its matching right item

Items

Ecotone
Ecological Niche
Biome
Abiotic Component

Matches

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Answer

Ecotone matches with the transitional zone where two distinct biological communities meet; Ecological Niche matches with the functional role and biotic interactions of a species; Biome matches with a large regional ecosystem characterized by distinct climate and vegetation; Abiotic Component matches with non-living physical and chemical factors.
Each ecological concept is directly paired with its fundamental definition: Ecotone is the transitional boundary between communities; Ecological Niche defines the functional role of an organism; Biome is a large regional ecosystem classified by climate and plant life; Abiotic Component comprises the non-living physical factors of the ecosystem.

Step-by-Step Solution

1
Identify the definition of Ecotone
Ecotone represents the transition zone between two different ecosystems.
Concept definition matching.
2
Identify the definition of Ecological Niche
Ecological Niche refers to the functional role of a species, distinguishing it from physical habitat.
Concept definition matching.
3
Identify the definition of Biome
Biome refers to a broad geographic climatic zone with characteristic flora and fauna.
Concept definition matching.
4
Identify the definition of Abiotic Component
Abiotic components encompass non-living ecological factors like temperature, water, and soil.
Concept definition matching.

Key Concept

Basic Concepts of Ecology and Ecosystem Structure
Estimated Time:45s
Question 99Question →

With reference to the Environmental Impact Assessment (EIA) Notification, 2006 in India, consider the following statements:

1. Category 'A' projects require mandatory environmental clearance at the central level by the Ministry of Environment, Forest and Climate Change (MoEFCC) based on recommendations of the Expert Appraisal Committee (EAC).
2. Category 'B1' projects are appraised at the state level by the State Level Environment Impact Assessment Authority (SEIAA) and undergo mandatory Environmental Impact Assessment and public consultation.
3. Category 'B2' projects are strictly required to conduct a public hearing and submit a detailed Environmental Impact Assessment report prior to clearance.

Which of the statements given above is/are correct?

Show answer & explanation

Answer: 1 and 2 only

Answer

The correct option is 1 and 2 only.
Category 'A' projects are cleared at the national level by MoEFCC on the advice of the Expert Appraisal Committee (EAC). Category 'B' projects are handled at the state level by the State Level Environment Impact Assessment Authority (SEIAA). Category 'B1' requires a full EIA study and public consultation, whereas Category 'B2' projects are exempted from both EIA preparation and public consultation. Therefore, statements 1 and 2 are correct, while statement 3 is false.

Step-by-Step Solution

1
Evaluate Statement 1 regarding Category 'A' projects
Category 'A' projects have potential significant impacts and require prior environmental clearance from MoEFCC based on Expert Appraisal Committee (EAC) recommendations.
Statement 1 is correct per the EIA Notification, 2006 framework.
2
Evaluate Statement 2 regarding Category 'B1' projects
Category 'B' projects are divided into B1 and B2. Category B1 projects require a full EIA process, including public consultation, and are appraised at the state level by the State Level Expert Appraisal Committee (SEAC) and cleared by the SEIAA.
Statement 2 is correct.
3
Evaluate Statement 3 regarding Category 'B2' projects
Category B2 projects are explicitly exempted from the requirement of a detailed EIA report and public hearing/consultation process. They are appraised directly based on standard Form 1/Form 1A submissions.
Statement 3 is incorrect.

Key Concept

Categorization and clearance procedures under the EIA Notification, 2006 (Category A vs. Category B1 and B2).
Estimated Time:1m 30s
Question 100Question →

Which of the following statements regarding species endemism and ecological diversity metrics are correct?

Select all that apply

Show answer & explanation

Answer: Palaeo-endemism refers to evolutionary ancient species that were once widespread but are now geographically restricted to specific isolated refugia.; High beta diversity indicates a high rate of turnover in species composition between different adjacent habitats or ecological gradients.

Answer

The correct statements are that palaeo-endemism refers to ancient species restricted to isolated refugia, and high beta diversity indicates rapid species turnover across habitats.
Palaeo-endemism accurately characterizes ancient species (relicts) now restricted to small areas. Beta diversity specifically measures the turnover rate of species composition when moving between different communities or habitats.

Step-by-Step Solution

1
Evaluate the definition of palaeo-endemism
Palaeo-endemism accurately describes relict populations of phylogenetically older groups confined to remnant refugia.
It contrasts with neo-endemism, where newly evolved species have not yet spread beyond their origin.
2
Analyze the territorial coverage of Indian biodiversity hotspots
The Nicobar group of islands falls under the Sundaland hotspot, not Indo-Burma.
Indo-Burma encompasses Northeast India and the Andaman Islands, while Sundaland extends into the Nicobar Islands.
3
Distinguish between Whittaker's diversity indices (Alpha, Beta, and Gamma)
Beta diversity measures species turnover between communities, while Gamma diversity measures overall regional diversity.
Alpha is local richness, Beta is composition change across habitats, and Gamma is total regional richness.

Key Concept

Classification of endemic species types, spatial limits of Indian biodiversity hotspots, and Whittaker's ecological diversity indices.
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