201. A biodiversity-rich region is identified as a hotspot, while a small forest patch inside another region is protected for generations through local cultural tradition. Which classification correctly distinguishes the two concepts?
ⓐ. Hotspot = rich, endemic, threatened priority region; sacred grove = culturally protected habitat.
ⓑ. A hotspot is an ex situ facility, whereas a sacred grove is an in situ facility.
ⓒ. Both terms describe legally notified national parks.
ⓓ. A sacred grove is defined by high global endemism, whereas a hotspot is defined only by religious protection.
Correct Answer: Hotspot = rich, endemic, threatened priority region; sacred grove = culturally protected habitat.
Explanation: A biodiversity hotspot is identified through a combination of exceptional biological richness, substantial endemism and serious habitat loss, making it a conservation-priority concept. A sacred grove, in contrast, is an actual natural forest patch protected through cultural or religious traditions. Both can contribute to in situ conservation, but they are not equivalent categories: one identifies regional conservation priority, whereas the other describes a culturally maintained protection practice. The biological logic also shows that moving one rare species to cultivation may provide ex situ backup, but it cannot preserve the full ecological community or all relationships maintained by the grove. For this biological comparison, geographical examples of sacred groves illustrate that community-based habitat protection occurs across several Indian landscapes rather than in one single locality. This comparison also makes clear that rare and threatened plants can persist in sacred groves precisely since the habitat itself receives continuing protection from destructive use.
202. Consider the following statements about sacred groves and legally protected areas:
I. Sacred groves may be protected primarily through cultural traditions rather than statutory designation.
II. National parks and wildlife sanctuaries are examples of formally protected in situ areas.
III. The absence of formal legal designation automatically makes a sacred grove an ex situ conservation method.
Which option is correct?
ⓐ. I and II only
ⓑ. I only
ⓒ. II and III only
ⓓ. I, II and III
Correct Answer: I and II only
Explanation: Sacred groves may persist as local communities culturally protect natural forest tracts, whereas national parks and wildlife sanctuaries represent formally protected natural areas. Both can conserve organisms within their natural ecological setting and function as in situ conservation. Ex situ conservation depends on organisms or biological material being maintained outside the natural habitat, not on whether protection arises from law or cultural tradition. Looking across the stated conditions, geographical examples of sacred groves illustrate that community-based habitat protection occurs across several Indian landscapes rather than in one single locality. Rare and threatened plants can persist in sacred groves precisely as the habitat itself receives continuing protection from destructive use. A related point is that sacred groves are in situ conservation sites as community protection allows natural vegetation, rare species and ecological interactions to persist within the original habitat.
203. Study the conservation sites below.
| Site | Description |
|---|
| P | A species-rich, highly endemic region undergoing rapid habitat destruction |
| Q | A forest legally protected as a national park |
| R | A natural forest patch protected through community tradition |
| S | Threatened animals maintained in a zoological park |
Which interpretation is most accurate?
ⓐ. P, Q, R and S are all equivalent forms of legally protected in situ conservation.
ⓑ. P is ex situ, Q is a hotspot, R is a zoological facility and S is a sacred grove.
ⓒ. P is hotspot prioritisation; Q and R are in situ protection; S is ex situ conservation.
ⓓ. Only Q represents conservation because the other sites lack national-park status.
Correct Answer: P is hotspot prioritisation; Q and R are in situ protection; S is ex situ conservation.
Explanation: Site P has the biological features used in hotspot prioritisation: high richness, high endemism and severe habitat loss. Site Q protects organisms within a natural ecosystem through a national park, while Site R does so through a culturally protected natural forest patch. Site S maintains threatened animals away from their natural habitat, making it ex situ. The table separates conservation priority, natural-habitat protection and off-site conservation. Another relevant biological point is that combining ex situ backup with in situ protection can conserve both recoverable biological material and the ecosystem processes needed for natural persistence. The interpretation also requires recognising that ex situ conservation maintains organisms or biological material away from the original habitat and is most useful when urgent backup or managed propagation is needed. One important distinction is that seed banks, cryopreservation, tissue culture and managed living collections preserve different biological materials, so the method must match what can remain viable.
204. A bird species no longer survives anywhere in its natural range, but several breeding individuals remain alive in a specialised zoological facility. Which conclusion is most defensible?
ⓐ. The species must be classified as an invasive alien because it survives outside its natural habitat.
ⓑ. The species is globally extinct because no wild population remains.
ⓒ. The zoological population preserves the entire natural ecosystem in which the bird evolved.
ⓓ. Ex situ conservation prevented total species loss, but its original wild ecological role is absent.
Correct Answer: Ex situ conservation prevented total species loss, but its original wild ecological role is absent.
Explanation: A species can disappear from the wild yet persist under ex situ care. In that situation, living representatives and some genetic diversity may still be preserved, but the species is no longer participating in its original food web, competition, pollination, dispersal or other ecological interactions. Ex situ survival differs biologically from maintaining a self-sustaining population within the natural ecosystem. The evidence also separates these ideas since ex situ conservation maintains organisms or biological material away from the original habitat and is most useful when urgent backup or managed propagation is needed. The same reasoning also shows that seed banks, cryopreservation, tissue culture and managed living collections preserve different biological materials, so the method must match what can remain viable.
205. Gametes of a threatened mammal are collected for long-term conservation. Which sequence most appropriately links the two ex situ techniques discussed in biodiversity conservation if reproduction is later attempted?
ⓐ. In vitro fertilisation -> habitat fragmentation -> cryopreservation
ⓑ. Tissue culture -> cryopreservation -> pollination
ⓒ. Cryopreserve gametes -> later use in in vitro fertilisation
ⓓ. Seed banking -> natural fertilisation -> zoological preservation
Correct Answer: Cryopreserve gametes -> later use in in vitro fertilisation
Explanation: Cryopreservation is used to preserve reproductive material such as gametes for long periods in viable condition. In vitro fertilisation is a separate reproductive technique in which suitable gametes are later brought together under controlled conditions. The biological sequence moves from preservation of reproductive potential to its later use in assisted fertilisation rather than treating the two methods as interchangeable. In this context, seed banks, cryopreservation, tissue culture and managed living collections preserve different biological materials, so the method must match what can remain viable. Another useful inference is that stored genetic material can provide insurance against population loss but cannot by itself preserve the ecological interactions and habitat required in the wild. The underlying reason is that tissue culture is especially useful when viable living plant tissue can be propagated, while cryopreservation is suited to long-term storage of appropriate reproductive material.
206. Match the biological material or conservation target with the most appropriate ex situ method.
| Target | Method |
|---|
| P. Living threatened animal | 1. Seed bank |
| Q. Viable reproductive gametes | 2. Zoological park |
| R. Small amount of living plant tissue | 3. Cryopreservation |
| S. Genetically distinct crop seeds | 4. Tissue culture |
ⓐ. P-3, Q-2, R-1, S-4
ⓑ. P-2, Q-3, R-4, S-1
ⓒ. P-4, Q-1, R-3, S-2
ⓓ. P-2, Q-4, R-1, S-3
Correct Answer: P-2, Q-3, R-4, S-1
Explanation: A zoological park maintains whole living animals under specialised care. Cryopreservation can preserve viable gametes for long periods. Tissue culture can multiply plants from living tissues, while seed banks preserve seeds representing different genetic strains. These methods all belong to ex situ conservation but differ substantially in the biological material they preserve. The mechanism depends on the fact that stored genetic material can provide insurance against population loss but cannot by itself preserve the ecological interactions and habitat required in the wild. One related implication is that tissue culture is especially useful when viable living plant tissue can be propagated, while cryopreservation is suited to long-term storage of appropriate reproductive material. The evidence should also be read with the understanding that managed ex situ populations can support survival and later recovery, but long-term conservation still depends on suitable natural habitat whenever reintroduction is a goal.
207. Consider the following statements:
I. In situ conservation can preserve species together with their ecological interactions.
II. Ex situ conservation can preserve selected organisms or genetic material even when natural populations are in severe danger.
III. Ex situ conservation automatically preserves the complete original ecosystem.
IV. In situ and ex situ methods can sometimes complement each other.
Which combination is correct?
ⓐ. I and III only
ⓑ. I, II and IV only
ⓒ. I, II and III only
ⓓ. II and III only
Correct Answer: I, II and IV only
Explanation: In situ conservation protects biodiversity within the natural ecosystem, allowing ecological relationships and natural population processes to continue. Ex situ methods can provide emergency protection for threatened organisms, seeds, tissues or gametes outside that ecosystem. However, off-site storage does not reproduce the complete original ecological community. For severely threatened species, the two approaches can therefore complement one another rather than function as mutually exclusive alternatives. Managed ex situ populations can support survival and later recovery, but long-term conservation still depends on suitable natural habitat whenever reintroduction is a goal. The same principle indicates that combining ex situ backup with in situ protection can conserve both recoverable biological material and the ecosystem processes needed for natural persistence.
208. A plant species survives only as seeds stored in a conservation facility after its natural population disappears. Which biological component has been preserved most directly, and which component has been lost from the wild?
ⓐ. Both the wild ecosystem and the original population dynamics remain completely unchanged.
ⓑ. The complete ecosystem has been preserved, but the genetic material has been lost.
ⓒ. Only ecological diversity has been preserved because seeds contain no genetic information.
ⓓ. Genetic material persists, but natural interactions and ecosystem functions are lost.
Correct Answer: Genetic material persists, but natural interactions and ecosystem functions are lost.
Explanation: Stored seeds can preserve genetic information and potentially allow future regeneration of plants. However, once the wild population disappears, the species no longer participates in natural competition, mutualisms, food-web relations, reproduction or environmental selection within its original ecosystem. Ex situ genetic preservation is biologically valuable but does not equal preservation of the species' functioning natural population. Extending this reasoning, managed ex situ populations can support survival and later recovery, but long-term conservation still depends on suitable natural habitat whenever reintroduction is a goal. In biological terms, combining ex situ backup with in situ protection can conserve both recoverable biological material and the ecosystem processes needed for natural persistence. Recovery becomes biologically fuller only when viable populations can again persist and interact within suitable natural habitat.
209. A migratory animal regularly moves through habitats located in several countries during its annual cycle. Why does this provide a strong biological argument for international cooperation in biodiversity conservation?
ⓐ. Protection in one country may fail if migration habitats elsewhere degrade.
ⓑ. Migratory species are always endemic to a single country.
ⓒ. International conservation is needed only when a species is maintained in zoos.
ⓓ. Political boundaries prevent animals from moving naturally between ecosystems.
Correct Answer: Protection in one country may fail if migration habitats elsewhere degrade.
Explanation: Biological ranges and ecological requirements do not necessarily correspond to political boundaries. A migratory species may depend on breeding, feeding and resting habitats located in different countries. Protecting only one part of the route may fail if another essential habitat is destroyed. This illustrates why biodiversity conservation can require coordinated international responsibility. This pattern follows from the fact that international conservation is biologically relevant given that species distributions, migration routes and ecological processes can extend across political boundaries.
210. Assertion: The conservation message associated with the Rio Earth Summit of \(1992\) does not require complete prohibition of all human use of biodiversity.
Reason: The summit linked biodiversity conservation with sustainable utilisation of its benefits.
ⓐ. Both Assertion and Reason are true, but Reason does not explain Assertion.
ⓑ. Assertion is true, but Reason is false.
ⓒ. Both Assertion and Reason are true, and Reason explains Assertion.
ⓓ. Assertion is false, but Reason is true.
Correct Answer: Both Assertion and Reason are true, and Reason explains Assertion.
Explanation: Biodiversity science links the Rio Earth Summit of \(1992\) with conservation of biodiversity and sustainable utilisation of its benefits. Sustainable use means that biological resources may be used in ways that do not undermine their long-term persistence and ecological functioning. The Reason directly explains why the conservation principle is not equivalent to a blanket ban on every form of biological-resource use. A related point is that international conservation is biologically relevant since species distributions, migration routes and ecological processes can extend across political boundaries. The result should also be interpreted in light of the fact that the \(1992\) Rio meeting, the \(2002\) Johannesburg meeting and the \(2010\) target year represent distinct points in the conservation timeline. The comparison is strengthened by the fact that a target year is not the same event as the summit at which countries discussed or adopted the corresponding biodiversity commitment.
211. A mammal has disappeared from every natural population but remains alive and reproducing in a zoological facility. Which classification is biologically most accurate?
ⓐ. It is automatically a biodiversity hotspot because its range has contracted.
ⓑ. It must be globally extinct because no free-living population survives.
ⓒ. It may be absent from the wild yet survive globally in ex situ populations.
ⓓ. It is an endemic species because it now occurs in only one zoological facility.
Correct Answer: It may be absent from the wild yet survive globally in ex situ populations.
Explanation: Global extinction means that no living individuals of the species remain anywhere. If viable individuals survive under managed ex situ conditions, the species has not disappeared completely, even though its wild populations may have been lost. This distinction is important as ex situ conservation can preserve a species beyond the point at which it disappears from its natural habitat, although ecological restoration would still require more than captive survival. One important distinction is that seed banks, cryopreservation, tissue culture and managed living collections preserve different biological materials, so the method must match what can remain viable. This line of reasoning also establishes that stored genetic material can provide insurance against population loss but cannot by itself preserve the ecological interactions and habitat required in the wild.
212. Examine the following conservation records.
| Record | Condition |
|---|
| P | Threatened species persists in a protected natural habitat |
| Q | Species survives only in a zoological facility |
| R | Several genetic strains of one crop are stored as seeds |
| S | Natural forest community remains intact inside a sanctuary |
Which interpretation is correct?
ⓐ. P and S are ex situ, while Q and R are in situ.
ⓑ. P and S are in situ, whereas Q and R are ex situ.
ⓒ. Q and S both preserve the complete original ecosystem.
ⓓ. Only R represents conservation because it stores genetic diversity.
Correct Answer: P and S are in situ, whereas Q and R are ex situ.
Explanation: Records P and S involve organisms remaining within protected natural ecosystems, so they represent in situ conservation. Record Q maintains a species outside its natural habitat, and Record R preserves crop germplasm in a seed bank; both are ex situ. The four records also demonstrate that conservation can target whole ecosystems, living organisms or genetic material at different biological scales. Viewed biologically, stored genetic material can provide insurance against population loss but cannot by itself preserve the ecological interactions and habitat required in the wild. The process can be understood by noting that managed ex situ populations can support survival and later recovery, but long-term conservation still depends on suitable natural habitat whenever reintroduction is a goal.
213. A forest plant depends on one highly specialised pollinator. Large-scale clearing removes most of the plant's habitat, the plant population collapses, and the pollinator subsequently disappears because no alternative resource exists. Which interpretation best captures the sequence?
ⓐ. The initial process is over-exploitation, followed by alien invasion.
ⓑ. The pollinator disappears because greater habitat fragmentation always increases niche breadth.
ⓒ. Co-extinction occurs first and causes the habitat to be cleared.
ⓓ. Habitat loss occurs first, followed by possible co-extinction of the dependent pollinator.
Correct Answer: Habitat loss occurs first, followed by possible co-extinction of the dependent pollinator.
Explanation: The direct initial pressure is habitat loss since the plant's natural habitat is destroyed. If the pollinator is obligatorily dependent on that plant, collapse of the plant population can then remove the resource required for the pollinator's survival, producing co-extinction. The scenario shows how one member of the Evil Quartet can initiate conditions that trigger another mechanism downstream. The underlying reason is that an alternative host or partner can reduce co-extinction risk by removing the exclusivity of the original biological dependence. A linked biological principle is that simple coexistence in the same habitat is not enough to establish co-extinction; the key condition is biological dependence that cannot be bypassed. A complete interpretation also considers that the mechanism differs from alien invasion or over-exploitation since the secondary loss follows the disappearance of an essential associated species.
214. An alien predatory fish is introduced into a lake and eliminates a native fish species. A parasite that could reproduce only on that native fish then also disappears. Which causal sequence is correct?
ⓐ. Co-extinction -> alien invasion -> habitat loss
ⓑ. Alien invasion -> host loss -> parasite co-extinction
ⓒ. Over-exploitation -> fragmentation -> co-extinction
ⓓ. Habitat loss -> increased endemism -> alien invasion
Correct Answer: Alien invasion -> host loss -> parasite co-extinction
Explanation: The primary disturbance is introduction of an alien predator that causes extinction of the native host. The parasite is not necessarily affected directly by the alien fish; it disappears as its only host is lost. Thus alien species invasion initiates the sequence, while co-extinction is the secondary biodiversity-loss mechanism affecting the dependent parasite. The evidence should also be read with the understanding that simple coexistence in the same habitat is not enough to establish co-extinction; the key condition is biological dependence that cannot be bypassed. This distinction is reinforced by the fact that the mechanism differs from alien invasion or over-exploitation as the secondary loss follows the disappearance of an essential associated species. Following the same logic, co-extinction is strongest when one species depends obligatorily on another and has no alternative host, pollinator or biological partner capable of replacing that function.
215. A forest mammal declines because its habitat is divided by roads and because hunting removes individuals faster than reproduction replaces them. Which statement best diagnoses the situation?
ⓐ. Fragmentation and over-exploitation are acting simultaneously.
ⓑ. The decline must be classified only as fragmentation because habitat change occurs first.
ⓒ. The decline must be classified only as over-exploitation because direct mortality is involved.
ⓓ. Both pressures are forms of co-extinction.
Correct Answer: Fragmentation and over-exploitation are acting simultaneously.
Explanation: Roads divide the natural habitat into disconnected patches, which is fragmentation. Hunting that exceeds biological replacement represents over-exploitation. Real populations may experience more than one biodiversity-loss pressure at the same time, so a biologically accurate diagnosis should recognise both mechanisms rather than forcing the scenario into a single category. The same principle indicates that the key biological boundary is whether use remains within renewal capacity or instead produces a continuing deficit that drives population decline. For the biological relationship involved, over-exploitation occurs when biological removal persistently exceeds the population's capacity for replacement under the prevailing conditions. Comparison of the evidence also shows that sustainable use depends on the balance between extraction and renewal, not simply on whether some reproduction continues after harvesting.
216. A threatened large mammal is simultaneously affected by fragmented habitat and excessive hunting. Which intervention pair most directly addresses both causal mechanisms?
ⓐ. Introduce an alien predator and establish a seed bank.
ⓑ. Transfer all individuals to a botanical garden and increase hunting quotas.
ⓒ. Protect only one small habitat fragment and leave exploitation unchanged.
ⓓ. Restore habitat connectivity and keep harvesting within sustainable limits.
Correct Answer: Restore habitat connectivity and keep harvesting within sustainable limits.
Explanation: Fragmentation is addressed by protecting connected habitat or restoring movement pathways between suitable areas. Over-exploitation is addressed by reducing removal so that mortality no longer exceeds the population's capacity for replacement. Because the species faces both pressures, an effective conservation response must act on both biological causes rather than applying an unrelated single intervention. The evidence further indicates that over-exploitation occurs when biological removal persistently exceeds the population's capacity for replacement under the prevailing conditions. The underlying process is clearer once we note that sustainable use depends on the balance between extraction and renewal, not simply on whether some reproduction continues after harvesting. An additional biological point is that historical extinction examples show that even abundant organisms can collapse when intense human removal continues faster than population recovery.
217. Four conservation strategies are evaluated.
| Strategy | What is directly preserved | Claim made by the planner |
|---|
| P | Natural forest in a national park | Species interactions can continue in the habitat |
| Q | Seeds from several crop strains | Genetic resources can be retained |
| R | Gametes under cryopreservation | Reproductive material can remain available for later use |
| S | Animals in a zoological park | The complete original ecosystem is preserved with them |
Which strategy contains an overstatement?
ⓐ. Strategy P
ⓑ. Strategy Q
ⓒ. Strategy S
ⓓ. Strategy R
Correct Answer: Strategy S
Explanation: A zoological park can preserve living individuals of a threatened species, but it does not preserve the complete original natural ecosystem, including all competitors, prey, predators, parasites, mutualists and environmental processes. The other three claims appropriately match what their respective conservation strategies directly preserve. The comparison highlights the difference between saving selected biological material or organisms and conserving an intact ecosystem. A closely related idea is that seed banks, cryopreservation, tissue culture and managed living collections preserve different biological materials, so the method must match what can remain viable. The biological interpretation additionally recognises that stored genetic material can provide insurance against population loss but cannot by itself preserve the ecological interactions and habitat required in the wild. This boundary is important since tissue culture is especially useful when viable living plant tissue can be propagated, while cryopreservation is suited to long-term storage of appropriate reproductive material.
218. Using the NCERT textbook approximation that biodiversity hotspots occupy less than \(2\%\) of Earth's land area and that strict protection could reduce ongoing mass extinction by almost \(30\%\), which interpretation is scientifically safest?
ⓐ. The figures prove that every \(1\%\) of hotspot area prevents exactly \(15\%\) of extinction.
ⓑ. The figures show that a relatively small land area may have a disproportionately large conservation impact.
ⓒ. The figures establish an exact impact-to-area ratio of \(15\) for every biodiversity hotspot.
ⓓ. The figures imply that all hectares within biodiversity hotspots have equal conservation value.
Correct Answer: The figures show that a relatively small land area may have a disproportionately large conservation impact.
Explanation: The land-area value is stated as less than \(2\%\), while the possible reduction in ongoing mass extinction is stated as almost \(30\%\). Because one value is an inequality and the other is an approximation, the data should not be converted into an exact universal ratio. The biologically supported conclusion is that strict protection of a very small fraction of Earth's land surface could have a disproportionately large effect on conserving threatened and irreplaceable biodiversity. The figures illustrate conservation prioritisation, not a fixed per-hectare law.
219. A graph shows species richness increasing as sampled area increases, following the ordinary species-area relationship. A planner concludes that the largest region on the graph must automatically qualify as a biodiversity hotspot. Why is this conclusion invalid?
ⓐ. Species-area data alone do not establish hotspot criteria.
ⓑ. Hotspots are defined only by geographical area.
ⓒ. The species-area relationship applies only to ex situ populations.
ⓓ. Species richness never increases with area.
Correct Answer: Species-area data alone do not establish hotspot criteria.
Explanation: The species-area relationship describes how recorded richness tends to increase with explored area. Hotspot status requires additional biological information, particularly high endemism and substantial habitat loss or threat. A large region may contain many species simply owing to its area yet lack the combination of uniqueness and danger central to hotspot prioritisation. Thus two ecological concepts must not be treated as interchangeable. The biological interpretation is that within-region species-area slopes are often shallower than slopes obtained from comparisons across very large geographical regions such as continents. A second implication is that area-richness information alone cannot establish hotspot status, which additionally depends on biological uniqueness and serious habitat threat. One mechanistic point is that quantitative comparisons should preserve the same \(C\) and \(Z\) assumptions stated in the scenario before a richness ratio or slope interpretation is made. Another relevant biological point is that in the relation \(\log S=\log C+Z\log A\), \(Z\) is the slope on log-log axes, while \(\log C\) contributes to the intercept.
220. Region P lies close to the equator and contains very high species richness, but most species are widespread and its habitat remains relatively secure. Region Q contains many endemic species and is undergoing rapid habitat loss. Which conclusion is most appropriate?
ⓐ. Region P must be the stronger hotspot because latitude is the only hotspot criterion.
ⓑ. Tropical richness alone does not establish hotspot status; endemism and threat matter.
ⓒ. Region Q cannot be a hotspot because it is not stated to lie exactly on the equator.
ⓓ. Hotspot status depends only on total land area and not on species distribution.
Correct Answer: Tropical richness alone does not establish hotspot status; endemism and threat matter.
Explanation: The latitudinal gradient explains why tropical regions often contain high species richness, but hotspot designation asks a different conservation question. It combines biological richness with high endemism and serious habitat loss. A species-rich tropical region is not automatically a hotspot, while a region containing many geographically restricted species under severe threat can deserve stronger conservation priority. The process can be understood by noting that the strongest explanation is the one tied to the variable actually changed in the scenario rather than to another tropical characteristic that was not measured. This also connects to the fact that high tropical richness can arise through several biological pathways, so evidence for one mechanism does not automatically prove that it is the sole cause.
