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Biodiversity Ultimate Exam
Question 1. Which level of biodiversity refers to the variety of genes within a single species? A) Ecosystem diversity B) Species diversity C) Genetic diversity D) Functional diversity Answer: C Explanation: Genetic diversity is the variation of genes within a species, influencing adaptability and evolution. Question 2. The tropical rainforest biome is primarily characterized by which of the following? A) Low annual precipitation B) High temperature variability seasonally C) High species richness and constant warm temperatures D) Dominance of C4 grasses Answer: C Explanation: Tropical rainforests have warm, stable climates year-round and host the greatest number of species. Question 3. In India, the Western Ghats are recognized as a biodiversity hotspot because they contain: A) Only marine species B) High endemism and severe habitat loss C) Low species richness but large populations D) Only invasive species Answer: B Explanation: Hotspots are regions with exceptional endemism and significant threat; the Western Ghats meet both criteria. Question 4. Which ecosystem service is classified as “regulating”? A) Timber production B) Pollination by bees
Biodiversity Ultimate Exam
C) Carbon sequestration by forests D) Cultural heritage tourism Answer: C Explanation: Regulating services modify environmental conditions; carbon sequestration regulates climate. **Question 5. The order Carnivora is distinguished by which morphological trait? ** A) Hooves adapted for running B) Specialized carnassial teeth for shearing meat C) Enlarged cecum for herbivory D) Presence of a pouch Answer: B Explanation: Carnivorans possess carnassial teeth that function like scissors to slice flesh. Question 6. Which adaptation enables hummingbirds to hover in place? A) Long, curved beak B) High wingbeat frequency and figure-8 wing motion C) Large talons for grasping D) Thick, waterproof feathers Answer: B Explanation: Hummingbirds beat their wings up to 80 times per second in a figure-8 pattern, creating lift on both up- and down-strokes. Question 7. The presence of a “parotoid gland” is a diagnostic feature of which amphibian group? A) Anurans (frogs) B) Caudates (salamanders) C) Gymnophiona (caecilians) D) None; it belongs to toads (family Bufonidae) Answer: D Explanation: Parotoid glands secrete toxins in true toads, deterring predators.
Biodiversity Ultimate Exam
D) Provide land for agriculture Answer: B Explanation: National Parks aim to conserve wildlife and habitats while permitting regulated ecotourism. Question 12. Ex-situ conservation of plant genetic resources is most commonly achieved through: A) Community forests B) Seed banks C) Grazing management D) River damming Answer: B Explanation: Seed banks store seeds under controlled conditions, preserving genetic material outside the natural habitat. Question 13. In restoration ecology, “assisted natural regeneration” involves: A) Planting mature trees only B) Removing all vegetation and re-seeding the site C) Protecting an area from disturbance to allow native seedlings to establish naturally D) Introducing exotic species for rapid cover Answer: C Explanation: Assisted natural regeneration minimizes intervention, allowing existing native seedlings to grow. Question 14. Habitat corridors are designed to: A) Increase edge effects B) Isolate populations C) Facilitate movement of wildlife between fragmented patches D) Reduce genetic diversity Answer: C Explanation: Corridors connect isolated habitats, allowing gene flow and dispersal.
Biodiversity Ultimate Exam
Question 15. The line-transect method for estimating animal density assumes that: A) All animals are visible regardless of distance B) Detection probability decreases with distance from the line C) Animals move toward observers D) Observers remain stationary for the entire count Answer: B Explanation: Distance sampling models decreasing detectability with increasing distance from the transect line. Question 16. Which remote-sensing index is most frequently used to assess vegetation health? A) NDVI (Normalized Difference Vegetation Index) B) LST (Land Surface Temperature) C) SAR (Synthetic Aperture Radar) D) DEM (Digital Elevation Model) Answer: A Explanation: NDVI compares red and near-infrared reflectance to indicate photosynthetic activity. **Question 17. Rabies in wildlife is most commonly transmitted by which route? ** A) Ingestion of contaminated water B) Aerosol inhalation C) Bites delivering infected saliva D) Vector-borne tick bites Answer: C Explanation: Rabies virus is present in saliva; bites are the principal transmission route. Question 18. Foot-and-mouth disease primarily affects: A) Carnivores
Biodiversity Ultimate Exam
Explanation: Appendix II includes species that require trade monitoring to avoid over-exploitation. Question 22. The IUCN Red List category “Near Threatened” indicates that a species: A) Is extinct in the wild B) Is currently stable with no threats C) Is close to qualifying for a threatened category soon D) Is already Critically Endangered Answer: C Explanation: Near Threatened species do not meet criteria for Vulnerable yet but may do so in the near future. Question 23. Ramsar Convention sites are designated to protect: A) Mountain ranges B) Wetlands of international importance C) Desert ecosystems D) Marine coral reefs only Answer: B Explanation: Ramsar focuses on conservation and wise use of wetlands. Question 24. Wildlife forensics often uses which technique to identify poached ivory? A) DNA barcoding of mitochondrial DNA B) Radiocarbon dating of soil C) Spectrophotometry of leaf pigments D) Acoustic monitoring of bird calls Answer: A Explanation: DNA barcoding can match ivory fragments to specific elephant populations. Question 25. Traditional ecological knowledge (TEK) contributes to conservation by:
Biodiversity Ultimate Exam
A) Ignoring scientific data B) Providing locally adapted management practices C) Promoting unrestricted resource extraction D) Eliminating indigenous participation Answer: B Explanation: TEK integrates centuries-old observations, enhancing sustainable practices. Question 26. Which of the following best defines “ecosystem resilience”? A) The number of species in an ecosystem B) The ability of an ecosystem to resist change permanently C) The capacity to absorb disturbances and reorganize while retaining function D) The speed at which an ecosystem produces biomass Answer: C Explanation: Resilience is about recovery and maintaining core processes after perturbations. Question 27. The term “endemism” refers to: A) Species found worldwide B) Species restricted to a particular geographic area C) Species that are invasive D) Species that migrate seasonally Answer: B Explanation: Endemic species have a limited distribution, often confined to islands or specific regions. Question 28. In the order Chiroptera, the primary adaptation for flight is: A) Elongated hind limbs B) Modified forelimbs forming wings with a membranous patagium C) Heavy skeletal structure D) Scaling of the tail for balance Answer: B
Biodiversity Ultimate Exam
B) Their permeable skin makes them sensitive to environmental changes C) They are apex predators D) They migrate long distances annually Answer: B Explanation: Their skin absorbs pollutants, reflecting water and habitat quality. Question 33. The term “piscivore” refers to a diet consisting primarily of: A) Insects B) Plants C) Fish D) Mammals Answer: C Explanation: Piscivores specialize in catching and eating fish. Question 34. In animal behavior, “lek” mating systems are characterized by: A) Male parental care B) Males defending territories with resources C) Males gathering in display arenas while females choose mates D) Monogamous pair bonds Answer: C Explanation: Lekking involves males congregating and performing displays; females visit to select mates. **Question 35. Which physiological trait allows desert rodents to conserve water? ** A) Highly efficient kidneys that produce concentrated urine B) Large, wet fur C) Frequent drinking of open water sources D) Low metabolic rate only during daylight Answer: A Explanation: Concentrating urine reduces water loss, a key desert adaptation.
Biodiversity Ultimate Exam
Question 36. The “edge effect” in fragmented habitats typically results in: A) Increased interior species diversity only B) Higher predation and microclimatic changes at habitat boundaries C) Uniform species composition across the fragment D) Complete isolation of edge species from interior species Answer: B Explanation: Edges experience altered light, temperature, and predator dynamics, affecting species composition. Question 37. Which of the following is a primary cause of invasive alien plant spread in Indian grasslands? A) Natural seed dispersal by wind only B) Intentional planting for ornamental or agricultural purposes C) Strict fire suppression policies D) Exclusive reliance on native pollinators Answer: B Explanation: Human introduction for landscaping or agriculture often initiates invasions. Question 38. The “life-history strategy” of r-selected species is characterized by: A) Low reproductive rate, high parental care B. High fecundity, early maturity, short lifespan C. Long gestation, few offspring D. Territorial behavior and monogamy Answer: B Explanation: r-selected species thrive in unstable environments by producing many offspring quickly. Question 39. Which of the following mammals exhibits delayed implantation? A) African elephant B) Red fox C) Snowshoe hare
Biodiversity Ultimate Exam
Question 43. Which of the following is NOT a function of the mangrove root system? A) Stabilizing shorelines B) Providing nursery habitats for fish C) Filtering seawater through pneumatophores D. Producing large quantities of oxygen for terrestrial mammals Answer: D Explanation: Mangroves benefit aquatic and coastal ecosystems but do not directly supply oxygen to land mammals. Question 44. The “Allee effect” describes: A) Increased fitness at low population densities B) Decline in individual fitness when population density falls below a critical threshold C. A positive feedback loop that always increases population size D. Random genetic drift in large populations Answer: B Explanation: At low densities, difficulties in finding mates or cooperative behaviors can reduce survival and reproduction. Question 45. Which of the following is a major vector for the spread of the amphibian disease chytridiomycosis? A) Mosquitoes B. Trade of live amphibians and contaminated water C. Birds of prey D. Large mammals' foot traffic Answer: B Explanation: The fungus spreads through water and movement of infected amphibians, often facilitated by trade. Question 46. In the context of the Biological Diversity Act, 2002, “Access and Benefit Sharing (ABS)” primarily ensures: A. Unlimited commercial exploitation of genetic resources
Biodiversity Ultimate Exam
B. That benefits derived from utilization of genetic resources are shared with the source community C. That all genetic resources remain in the public domain D. That only foreign entities can use Indian genetic material Answer: B Explanation: ABS mandates fair and equitable sharing of benefits with indigenous communities and the nation. Question 47. Which of the following is an example of a provisioning ecosystem service? A. Carbon sequestration B. Pollination C. Timber production D. Flood regulation Answer: C Explanation: Provisioning services are tangible products obtained from ecosystems; timber is a classic example. Question 48. The “shuttle-run” method for estimating bird population density involves: A. Counting birds at a single point only B. Repeatedly moving a line transect across a habitat and recording detections each pass C. Using satellite imagery exclusively D. Setting up camera traps at waterholes only Answer: B Explanation: Repeated transect passes improve detection probability estimates. Question 49. Which of the following is a characteristic feature of the order Proboscidea? A. Antlers that are shed annually B. Long, muscular trunk used for feeding and manipulation C. Highly specialized hooves for running D. Venomous bite
Biodiversity Ultimate Exam
Question 53. Which of these is a typical indicator species for healthy freshwater streams? A. Common carp (Cyprinus carpio) B. Mayfly nymphs (Order Ephemeroptera) C. Tilapia (Oreochromis spp.) D. Mosquito larvae (Family Culicidae) Answer: B Explanation: Mayfly nymphs require high dissolved oxygen and are sensitive to pollution. Question 54. The “social hierarchy” in wolf packs is best described as: A. Strict linear dominance with an alpha pair leading B. Random, no hierarchy C. Female-only dominance D. Equal sharing of all resources Answer: A Explanation: Wolf packs have an alpha breeding pair that leads and coordinates pack activities. Question 55. Which of the following is a direct consequence of over-grazing in grassland ecosystems? A. Increased soil organic matter B. Soil erosion and loss of plant cover C. Higher biodiversity of native grasses D. Expansion of forest canopy Answer: B Explanation: Over-grazing removes protective vegetation, exposing soil to wind and water erosion. Question 56. The term “cryptic species” refers to: A. Species that are extinct B. Species that are morphologically similar but genetically distinct C. Species that are only found underground
Biodiversity Ultimate Exam
D. Species that change color seasonally Answer: B Explanation: Cryptic species are difficult to differentiate visually but are separate lineages. Question 57. Which of the following is a legal consequence for violating the Wildlife (Protection) Act, 1972 in India? A. No penalty, only a warning B. Fine up to INR 100,000 and/or imprisonment up to three years C. Mandatory community service in a zoo only D. Immediate release of the offender without charge Answer: B Explanation: The Act prescribes stringent penalties including fines and imprisonment for offenses. Question 58. In population ecology, the “carrying capacity (K)” of an environment represents: A. The maximum number of individuals that can be supported long-term B. The current population size C. The birth rate of a species D. The number of predators in the ecosystem Answer: A Explanation: K is the equilibrium population size that resources can sustainably support. Question 59. Which of the following methods is most suitable for estimating the abundance of nocturnal mammals? A. Visual point counts during daylight B. Camera traps set at night C. Acoustic monitoring of bird songs D. Soil sampling for seed banks Answer: B Explanation: Camera traps capture images of elusive nocturnal species without human presence.
Biodiversity Ultimate Exam
D. Parental mouth-brooding Answer: B Explanation: Direct development bypasses the aquatic larval stage, producing fully formed froglets. Question 64. In the context of climate change, “phenological mismatch” occurs when: A. Species migrate earlier but food resources do not shift accordingly B. All species adapt at the same rate C. Temperature remains constant across seasons D. No species alter their life-cycle events Answer: A Explanation: Mismatches arise when timing of biological events (e.g., flowering, insect emergence) become out of sync. Question 65. Which of the following statements about “invasive alien fish” in Indian rivers is correct? A. All invasive fish improve native fish populations B. Tilapia species often outcompete native cyprinids for food and habitat C. Invasive fish are always larger than native species D. Invasive fish cannot reproduce in Indian waters Answer: B Explanation: Tilapia are prolific breeders and can dominate resources, threatening native species. Question 66. The “ex situ” conservation technique of “cryopreservation” is used primarily for: A. Storing seeds at low temperature B. Preserving animal embryos or gametes at ultra-low temperatures C. Keeping live animals in zoos D. Reforesting degraded lands Answer: B Explanation: Cryopreservation freezes genetic material for long-term storage.
Biodiversity Ultimate Exam
Question 67. Which of the following mammals is a monotreme? A. Kangaroo B. Platypus C. Hedgehog D. Koala Answer: B Explanation: Monotremes are egg-laying mammals; the platypus is a well-known example. Question 68. The “Biodiversity Heritage Library” primarily provides: A. Physical herbarium specimens B. Digitized literature on biodiversity for free access C. Live animal specimens for research D. Satellite images of forests Answer: B Explanation: The BHL is an online repository of biodiversity publications. Question 69. Which of the following is a common method for detecting illegal logging in protected forests? A. Satellite remote sensing using change-detection algorithms B. Counting bird songs at sunrise C. Measuring soil pH only D. Monitoring only tourist numbers Answer: A Explanation: Satellite imagery can reveal forest canopy loss indicative of illegal logging. Question 70. The “Alpine zone” is defined primarily by: A. High temperatures and low precipitation B. Elevation above the tree line with cold temperatures and short growing seasons C. Presence of mangroves
