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.

Drought which is caused due to lack of rains results in decreased food production.

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.

Conservation involves keeping the natural environment in its balanced state. Preservation involves keeping some of the earth's resources for future generations.

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.

Shift cultivation is a type of agricultural method in which farmer clears the land by burning forest and cultivate that land for short period of time. Once the soil becomes infertile farmer again clear the another land for cultivation. It is also called as jhum cultivation.

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

Correct Answer:
d) All of these

Explanation:

Projects aimed at protecting endangered species include those for tigers, elephants, and crocodiles. For example:

• Tiger Projects: Many conservation initiatives, such as Project Tiger, are designed specifically to protect tigers by preserving their natural habitats and preventing poaching.

• Elephant Projects: Numerous projects work on safeguarding elephants from threats like habitat loss and poaching, promoting coexistence with human populations.

• Crocodile Projects: Conservation efforts also target crocodile populations, ensuring that these reptiles are protected from habitat degradation and illegal hunting.

Since all these animals are the focus of various conservation projects worldwide, the correct answer is d) All of these.

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.

The primary goal of conserving living organisms is to maintain ecological balance and biodiversity. This includes:

• Preventing the extinction of endangered species
• Ensuring the health of ecosystems

Conservation also supports various secondary benefits such as:

• Ecotourism
• Educational research in fields like botany and zoology

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.

An endangered animal is one whose population is at such a low level that it is at significant risk of becoming extinct. This classification is often determined by conservation organisations like the IUCN (International Union for Conservation of Nature).

• Endangered species are at a high risk of extinction.
• Their populations are critically low.
• Classification is based on assessments by organisations such as the IUCN.

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.