A. Standard / Conceptual MCQs (Q1–Q30)

1. Basic Concepts of Biodiversity

Q1. Biodiversity refers to:
A. Number of ecosystems only
B. Variety of species, genes, and ecosystems
C. Only genetic variation within species
D. Number of predators in an ecosystem

Q2. Species richness means:
A. Total number of species in a given area
B. Number of individuals in a population
C. Genetic variation within a species
D. Biomass of an ecosystem

Q3. Genetic diversity refers to:
A. Variations in DNA among individuals of a species
B. Number of species in an area
C. Variety of ecosystems
D. Species interactions in a food web

Q4. Ecosystem diversity refers to:
A. Number of species in an area
B. Number of ecosystems in a region
C. Variation in DNA of a population
D. Total biomass

Q5. Endemic species are:
A. Found only in a specific region
B. Found worldwide
C. Migratory species
D. Domesticated species

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2. Threats to Biodiversity

Q6. Major threats to biodiversity include:
A. Habitat loss, poaching, pollution
B. Photosynthesis and respiration
C. Nitrogen fixation
D. Decomposition

Q7. Deforestation leads to:
A. Habitat loss and species extinction
B. Increase in biodiversity
C. Only soil erosion
D. No ecological impact

Q8. Poaching refers to:
A. Illegal hunting of wildlife
B. Conservation of endangered species
C. Planting trees
D. Wildlife photography

Q9. Invasive alien species can:
A. Outcompete native species
B. Enhance local biodiversity
C. Only affect climate
D. Only affect water quality

Q10. Overexploitation results in:
A. Decline of species population
B. Increase in ecosystem productivity
C. Nutrient recycling
D. Genetic variation

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3. Conservation Strategies

Q11. In-situ conservation means:
A. Protecting species in their natural habitat
B. Conserving species in zoos or botanical gardens
C. Genetic modification
D. Seed banking

Q12. Ex-situ conservation means:
A. Conserving species outside their natural habitat
B. Preserving species in the wild
C. Soil conservation
D. Forest restoration

Q13. National parks and wildlife sanctuaries are examples of:
A. In-situ conservation
B. Ex-situ conservation
C. Community reserves
D. Botanical gardens

Q14. Gene banks and seed banks are examples of:
A. Ex-situ conservation
B. In-situ conservation
C. Ecosystem restoration
D. Reforestation

Q15. Biosphere reserves aim to:
A. Conserve biodiversity and maintain ecological balance
B. Promote urban development
C. Reduce soil fertility
D. Increase industrialization

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4. Biodiversity Hotspots and Global Conservation

Q16. A biodiversity hotspot is defined as a region with:
A. At least 1500 species of vascular plants as endemics and >70% habitat loss
B. Low species diversity
C. Only exotic species
D. Only marine life

Q17. India has how many biodiversity hotspots?
A. 4
B. 6
C. 2
D. 8

Q18. Western Ghats and Himalaya are:
A. Biodiversity hotspots of India
B. Marine protected areas
C. Deserts
D. Tundra regions

Q19. Red Data Book is used to:
A. List threatened and endangered species
B. List common species
C. Record ecosystem productivity
D. Record fossil species only

Q20. Convention on Biological Diversity (CBD) is:
A. An international agreement to conserve biodiversity
B. A national policy of India
C. Only for genetic engineering
D. A forest management program

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5. Sustainable Use and Community Participation

Q21. Sustainable development means:
A. Use of natural resources without compromising future needs
B. Unlimited exploitation of resources
C. Conversion of forests to agriculture only
D. Industrial expansion at the cost of ecosystems

Q22. Sacred groves are an example of:
A. Community-based biodiversity conservation
B. Urban parks
C. Botanical gardens
D. Wildlife safari areas

Q23. Eco-tourism promotes:
A. Biodiversity conservation with economic benefits
B. Overexploitation of wildlife
C. Desertification
D. Mining activities

Q24. Biosphere reserves have which zones?
A. Core, buffer, and transition
B. Only core
C. Only buffer
D. Only transition

Q25. Keystone species are important because:
A. Their removal affects ecosystem stability
B. They have high population density only
C. They are always apex predators
D. They are migratory species

Q26. Fragmentation of forests leads to:
A. Loss of habitat connectivity
B. Increase in species migration
C. No ecological impact
D. Increased gene flow

Q27. Global warming affects biodiversity by:
A. Altering habitats and causing species extinction
B. Increasing genetic diversity
C. Stabilizing ecosystems
D. None of the above

Q28. IUCN stands for:
A. International Union for Conservation of Nature
B. Indian Union for Climate and Nature
C. International Union for Chemical Nomenclature
D. Indian Union for Conservation of Nature

Q29. Migratory species require:
A. Connectivity between breeding and non-breeding habitats
B. Only a single protected area
C. Captive breeding
D. Only food supplementation

Q30. EDGE species refer to:
A. Evolutionarily Distinct and Globally Endangered species
B. Endemic species only
C. Exotic invasive species
D. Extinct species

A. Assertion–Reason MCQs (Q31–Q45)

Q.No	Assertion (A)	Reason (R)
31	Biodiversity includes genetic, species, and ecosystem diversity.	Different levels of diversity maintain ecosystem stability and adaptability.
32	Endemic species are more vulnerable to extinction.	Restricted geographic distribution increases susceptibility to habitat loss.
33	Habitat destruction is the primary cause of species extinction.	Human activities like deforestation and urbanization reduce habitats.
34	Invasive alien species threaten native biodiversity.	They outcompete, prey on, or hybridize with native species.
35	Poaching can lead to decline of keystone species.	Loss of keystone species disrupts ecological balance.
36	National parks and wildlife sanctuaries are examples of in-situ conservation.	Protecting species in their natural habitat maintains ecological interactions.
37	Seed banks and gene banks are ex-situ conservation methods.	They preserve genetic material outside the natural habitat.
38	Sacred groves are culturally protected areas.	Community traditions prevent exploitation and conserve biodiversity.
39	Biodiversity hotspots have high endemism and habitat loss.	They require urgent conservation measures due to threats.
40	Ecotourism promotes conservation and economic benefits.	Responsible tourism encourages sustainable use of natural resources.
41	Fragmentation of forests reduces gene flow among populations.	Isolated populations have limited mating opportunities, increasing inbreeding.
42	Climate change is a threat to biodiversity.	Rising temperatures, altered rainfall, and sea-level rise affect habitats.
43	Keystone species removal destabilizes ecosystems.	They have disproportionately large effects on community structure.
44	EDGE species are Evolutionarily Distinct and Globally Endangered.	Unique species with few close relatives require special conservation.
45	Biosphere reserves have core, buffer, and transition zones.	Zoning allows protection of biodiversity while permitting sustainable use.

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B. Difficult / Case-Based MCQs (Q46–Q60)

Q.No	Question
46	A tiger population in a fragmented forest is declining due to prey scarcity. Which conservation strategy is most suitable?
47	A medicinal plant is overharvested in the wild. How can ex-situ conservation help?
48	A coastal wetland faces invasive species colonization. What ecological impact is expected?
49	A community protects sacred groves in their village. What is the significance for local biodiversity?
50	A wetland ecosystem shows eutrophication due to agricultural runoff. What is the likely outcome for aquatic species?
51	A gene bank preserves seeds of endangered plant species. Why is this important for future restoration?
52	A forest reserve is divided by roads into isolated patches. Which problem arises for wildlife?
53	Climate warming causes polar ice melt affecting species survival. Which global concern does this illustrate?
54	Poaching of rhinos has decreased population drastically. What immediate measures are required?
55	Overfishing in a river reduces fish biodiversity. Which trophic level is directly impacted?
56	Ecotourism in a national park provides income but also leads to littering. How can sustainable tourism be ensured?
57	A migratory bird species’ breeding ground is destroyed. What is the consequence for its population?
58	A biodiversity hotspot in India shows high endemism but habitat loss continues. Which policy intervention is crucial?
59	Deforestation in tropical rainforests affects carbon sequestration. Which global environmental process is disturbed?
60	Captive breeding programs in zoos release animals back into the wild. Which type of conservation does this represent?

Biodiversity and Conservation – Answer Key (Q1–Q60)

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A. Standard / Conceptual MCQs (Q1–Q30)

Q.No	Answer	Brief Explanation
1	B	Biodiversity includes variety at genetic, species, and ecosystem levels.
2	A	Species richness = total number of species in an area.
3	A	Genetic diversity = variation in DNA among individuals of a species.
4	B	Ecosystem diversity = number and variety of ecosystems in a region.
5	A	Endemic species are found only in a specific geographic region.
6	A	Major threats: habitat loss, poaching, pollution, invasive species.
7	A	Deforestation destroys habitats → species extinction.
8	A	Poaching = illegal hunting of wildlife, threatening species.
9	A	Invasive species outcompete native species, reducing local biodiversity.
10	A	Overexploitation reduces population size of species.
11	A	In-situ = protecting species in natural habitats (national parks, sanctuaries).
12	A	Ex-situ = conservation outside natural habitat (zoos, seed banks).
13	A	National parks/wildlife sanctuaries = in-situ conservation examples.
14	A	Seed banks, gene banks = ex-situ conservation examples.
15	A	Biosphere reserves maintain biodiversity and ecological balance.
16	A	Hotspots = >1500 endemic plant species & >70% habitat loss.
17	B	India has 6 biodiversity hotspots.
18	A	Western Ghats and Himalaya = Indian biodiversity hotspots.
19	A	Red Data Book lists threatened/endangered species.
20	A	CBD = international convention for biodiversity conservation.
21	A	Sustainable development = resource use without compromising future needs.
22	A	Sacred groves = community-protected biodiversity areas.
23	A	Ecotourism promotes conservation while providing economic benefits.
24	A	Biosphere reserves have core, buffer, and transition zones.
25	A	Keystone species have major influence on ecosystem stability.
26	A	Forest fragmentation reduces habitat connectivity.
27	A	Climate change alters habitats → threatens species survival.
28	A	IUCN = International Union for Conservation of Nature.
29	A	Migratory species require connectivity between breeding/non-breeding habitats.
30	A	EDGE species = Evolutionarily Distinct and Globally Endangered.

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B. Assertion–Reason MCQs (Q31–Q45)

Q.No	Answer	Brief Explanation
31	A – Both True, R explains A	Biodiversity at multiple levels ensures ecosystem stability.
32	A – Both True, R explains A	Endemic species are restricted geographically → higher extinction risk.
33	A – Both True, R explains A	Habitat destruction (deforestation, urbanization) is main cause of extinction.
34	A – Both True, R explains A	Invasive alien species outcompete native species → threaten biodiversity.
35	A – Both True, R explains A	Poaching can remove keystone species → ecosystem imbalance.
36	A – Both True, R explains A	National parks/sanctuaries protect species in natural habitats.
37	A – Both True, R explains A	Seed/gene banks preserve genetic material outside natural habitat.
38	A – Both True, R explains A	Sacred groves are culturally protected → conserve biodiversity.
39	A – Both True, R explains A	Hotspots have high endemism & habitat loss → need urgent conservation.
40	A – Both True, R explains A	Ecotourism balances conservation with economic benefits.
41	A – Both True, R explains A	Fragmentation isolates populations → reduced gene flow, inbreeding.
42	A – Both True, R explains A	Climate change alters habitats → threatens biodiversity.
43	A – Both True, R explains A	Keystone species removal destabilizes communities.
44	A – Both True, R explains A	EDGE species = evolutionarily unique & globally endangered → require priority conservation.
45	A – Both True, R explains A	Core, buffer, transition zones in biosphere reserves allow protection and sustainable use.

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C. Difficult / Case-Based MCQs (Q46–Q60)

Q.No	Answer	Brief Explanation
46	In-situ conservation / Wildlife corridors	Prey scarcity → need habitat protection & connectivity to increase tiger survival.
47	Ex-situ cultivation / Botanical gardens	Cultivating endangered medicinal plants ensures survival outside natural habitat.
48	Reduction of native species / ecosystem imbalance	Invasive species outcompete native species → loss of biodiversity.
49	Community conservation	Sacred groves protect local flora/fauna through cultural traditions.
50	Hypoxia / fish kill	Eutrophication → algal bloom → oxygen depletion → aquatic species die.
51	Genetic resource preservation	Gene banks preserve seeds → future restoration & reintroduction possible.
52	Reduced gene flow / inbreeding	Road-induced fragmentation isolates populations → genetic bottleneck.
53	Global warming impact	Polar ice melt due to climate change threatens habitat → species survival risk.
54	Anti-poaching measures / legal protection	Immediate protection needed to prevent further rhino population decline.
55	Secondary consumers	Reduction in herbivores directly impacts carnivores feeding on them.
56	Sustainable ecotourism practices	Controlled visitor access, waste management, environmental education.
57	Population decline / local extinction	Loss of breeding ground → migratory birds cannot reproduce successfully.
58	Policy intervention: habitat protection & restoration	Legislation and active management needed in hotspot areas.
59	Disruption of carbon cycle	Deforestation reduces carbon sequestration → increased atmospheric CO₂.
60	Ex-situ conservation / captive breeding	Captive breeding → animals reintroduced into wild → outside natural habitat conservation.

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