Conservation

Correct answer: A. Barriers to movement and breeding due to isolation

Corridors connect separated habitats and ease animal movement. Exam tip: connect corridors with habitat connectivity.

Correct answer: D. Sustainable collection and community based monitoring

Sustainable collection can meet local needs while saving resources. Exam tip: connect conservation with community participation.

Correct answer: C. Because animals need not only safety but also food and breeding sites

Stopping hunting is not enough if habitat is lost. Exam tip: understand conservation as a complete approach.

Correct answer: A. They can compete with native species for resources

Invasive species can displace local plants and animals. Exam tip: connect them with biodiversity threat.

Correct answer: D. When saplings are only planted and not cared for later

The direct answer is D: a programme is weak when saplings are planted but not cared for afterward. Conservation is not measured only by the number of plants placed in the ground. A successful plantation needs suitable species, correct soil and water conditions, protection from grazing, regular watering when needed, removal of competing weeds, and checking whether the plants survive. The reasoning is: planting creates a beginning; care protects young plants; survival creates lasting vegetation; without care, many saplings may die, so the conservation result is poor. Option A is not weak because native species are usually better adapted to local conditions and support local biodiversity. Option B is strong because checking care and survival measures real success. Option C is strong because soil and water suitability improve survival. Option D is correct because planting without follow-up care may produce only an impressive number on paper. Common mistake: do not confuse plantation count with living forest.

Correct answer: B. A national park has stricter protection while a biosphere reserve balances conservation and sustainable use

A national park stresses strict protection while a biosphere reserve also stresses balanced use. Exam tip: distinguish protected area purposes.

Correct answer: A. Loss of one species can affect many other organisms

When biodiversity falls, ecological links can weaken. Exam tip: connect food chains with interdependence.

Correct answer: B. Damage assessment and regeneration of native species

After fire, restoration and return of native species are important. Exam tip: connect post disaster conservation with regeneration.

Correct answer: C. To understand species numbers and threat trends

Regular counting shows which species is increasing or declining. Exam tip: connect data with conservation planning.

Correct answer: D. Tourism should be rule based and low impact

Regulated and responsible tourism can raise awareness but uncontrolled tourism causes harm. Exam tip: connect tourism with responsibility.

Correct answer: B. It reduces erosion and protects quality of water habitats

Riparian vegetation protects both soil and water. Exam tip: connect vegetation along rivers with water conservation.

Correct answer: A. Planting only exotic ornamental plants and removing native shrubs

Conservation values native species and habitat quality. Exam tip: distinguish greenery from biodiversity.

Correct answer: C. Because it can protect the next generation of a species

If breeding sites remain safe, population decline can be reduced. Exam tip: connect breeding with species continuity.

Correct answer: D. Local support and monitoring may weaken

Local people's support is important for conservation success. Exam tip: see communities as conservation partners.

Correct answer: A. Replanting and natural regeneration

Sustainable management needs replenishment along with use. Exam tip: remember the balance of use and regeneration.

Correct answer: B. Because enforcement, monitoring and public participation are also needed

Laws are effective only with enforcement and monitoring. Exam tip: connect laws with implementation.

Correct answer: C. Because animals live with their ecological relationships in natural habitats

In natural habitats, animals complete life processes including food, shelter and breeding. Exam tip: prioritize in situ conservation.

Correct answer: D. Damage to wildlife and habitat quality

Waste can affect animals, soil and water sources. Exam tip: connect pollution with habitat degradation.

Correct answer: A. When habitats shrink and animals move near human settlements

When habitats shrink, wildlife may reach settlements searching for food and space. Exam tip: connect conflict with habitat loss.

Correct answer: B. They are linked with human health, traditional knowledge and biodiversity

Medicinal plants are both useful resources and part of ecological diversity. Exam tip: mention both utility and biodiversity.

Correct answer: C. Tree roots bind soil and reduce fast runoff of rainwater

The direct answer is C: tree roots bind soil and reduce the fast runoff of rainwater. Forest conservation keeps vegetation cover on the ground. Roots hold soil particles together, while leaves, branches and leaf litter soften the impact of raindrops. The roots and organic matter also help water enter the soil, so less water rushes across the surface and carries soil away. This reduces erosion and protects fertile topsoil. Option A is wrong because forests do not stop soil formation; organic matter can support it. Option B is wrong because trees do not always blow soil away; their roots usually hold it. Option C is correct because it gives both important processes: binding soil and reducing rapid runoff. Option D is wrong because trees generally reduce, rather than always increase, erosion. The word “always” makes the extreme alternatives especially unreliable. Memory cue: forest cover means firm soil and slower runoff.

Correct answer: D. Because a large but polluted and disconnected habitat may be less useful

A habitat also needs food, water, safety and connectivity. Exam tip: connect habitat quality with survival factors.

Correct answer: A. Promoting alternative fuel and regulated collection

Alternative fuel reduces pressure on trees and regulated collection keeps balance. Exam tip: connect energy needs with forest pressure.

Correct answer: B. They help preserve genetic material of threatened plant species

Such centres can help restore rare plants in the future. Exam tip: connect them with species conservation.

Correct answer: C. Because grasslands are also habitats for specific organisms and ecological relations

The direct answer is Option C: grasslands are habitats for particular organisms and ecological relationships. A habitat is a place where plants, animals and small organisms find food, water, shelter and breeding conditions. Grasslands are not empty land. Their grasses, herbs, insects, birds, reptiles, grazing animals, predators and decomposers form connected food chains. They also protect soil, support pollinators and provide livelihoods in some regions. Therefore, conservation must protect different ecosystems, not only forests. Option A is wrong because grasslands do not always prevent forests from forming; natural conditions and human management differ from place to place. Option B is wrong because grasslands contain abundant life. Option C is correct because special species and ecological links depend on them. Option D is wrong because biodiversity is created by many kinds of organisms and habitats, not only trees. Memory cue: conservation means protecting every valuable ecosystem, including grasslands.