Important Questions Test: Conservation of Plants & Animals - Class 8 MCQ

The diversity of genes, species and ecosystems of a region is called biodiversity.

Uncontrolled deforestation leads to destruction of habitats, soil erosion, flash floods, increase of carbon dioxide in the air and global warming.

Biosphere is the name given to the region that include all living organisms and all life supporting regions of the earth.

By recycling resources, we can prevent overexploitation of resources and conserve the resources and in turn conserve the environmen

The non-living or abiotic components of an ecosystem are air, water, temperature, soil etc.

Preservation and conservation aim to protect natural resources and maintain ecological balance.

Recycling reduces the need to extract fresh raw materials, decreases waste sent to landfills and lowers pollution and energy consumption; these effects help conserve resources and preserve ecosystems.

Deforestation, soil erosion and pollution damage ecosystems, deplete resources and increase environmental harm; they are practices to avoid.

Therefore, Recycling is the practice that must be followed to preserve and conserve the environment.

Correct answer: B

The introduction of exotic species into an area disturbs the natural ecology balance. They compete with the native species for nutrients, shelter and spread new diseases.

Forests stop soil erosion, provide shelter and thus prevent floods. Forests provide us with oxygen and rainfall.

IUCN red list is a book which keeps the record of all the endangered plants and animals.

The root system of many plants especially grasses, have high soil binding capacity and thus help in the prevention of soil erosion.

Deforestation causes soil erosion causes desertification and floods. It can be prevented by afforestation, proper land management and preventing overgrazing.

Plants, known as flora, and animals, referred to as fauna, are both considered living resources in nature.

Soil, while essential for supporting life, is composed of non-living matter and therefore not classified as a living resource.

Thus, the correct answer includes both flora and fauna.

Habitat destruction, over use of natural resources and manss interference with nature pose a threat to biodiversity.

Biological imbalance occurs due to human activities disrupting ecosystems. This leads to changes in:

• Population dynamics
• Food chains
• Nutrient cycles
• Overall ecosystem health

These disruptions can result in potentially harmful effects on biodiversity.

- Establishing wildlife sanctuaries is key to conserving forests and wildlife.
- Sanctuaries protect natural habitats, allowing ecosystems to thrive without human interference.
- They provide a safe haven for endangered species, aiding in their recovery and preventing extinction.
- Sanctuaries also support biodiversity by preserving different species and their habitats.
- By maintaining ecological balance, they contribute to sustainable environmental health.