Class 8 Science Chapter 5 MCQ

Wild buffalo is an endangered species because its population is diminishing. Endangered species are the species which are facing the risk of extinction. Their numbers are decreasing to such a low level that they might face extinction soon.

Clearing of land to plant crops and build road is responsible for extinction of a species.

The process by which fertile land becomes desert is called desertification. It takes place due to the deforestation. When forest trees are cut, there will be no roots to bind the soil particles together and prevent them for from carrying away. Thus, the top layer of soil erodes out exposing the lower hardy and rocky soil layer. This layer is not for fertile. Gradually, plants do not grow well and fertile land gets converted into a desert.

Zoos are places where animals are protected in artificial setting instead of their natural habitat.

A Biosphere Reserve is a large, protected area of land meant for the conservation of wildlife, biodiversity and the traditional lifestyle of tribal people (i.e., culture) living in the area.

Endemic species are those species of plants and animals which are found exclusively in a specific habitat. Example, Sal and wild mango are endemic plants of Pachmarhi Biosphere Reserve. Their existence in endangered by the destruction of their habitats, increasing human population and introduction of new species.

Here, are all the statements are incorrect, except option [A]. Hence, your answer will be option [A].

A wildlife sanctuary is a protected area, which is artificially created for the protection of wild animals in their natural habitat. Killing (poaching) or capturing of animals is strictly prohibited in these areas.

Explanation: The species which are facing the risk of extinction due to their diminishing numbers are called endangered species. An animal species become endangered due to: i)They are few in number. ii)They are being killed by predators. iii)Hunted by human. iv)Their natural habitat is being destroyed.

Blackbuck, elephant, python and golden at together represent fauna in a forest. The animals of particular area called fauna of that area. Flora is the plants of a particular area. Ecosystem includes all the living organisms of an area and their physical environment. Species is a group of population which are capable of interbreeding.

Endemic plants are special because they are found in only one location on the planet, and nowhere else. It is due to their survival in particular climatic and geological conditions.

The process of a bird moving from one place to another due to the climatic changes is called migration. It is an adaptation to escape extreme weather conditions and lack of nesting areas. The fly for laying eggs as the weather in their natural habitat becomes very inhospitable.

Soil erosion will be the environmental impact of clearing larger patches of forest or deforestation. When trees are cut down then there are no roots to bind the soil particles and prevent them from being carried away by strong wind or water. This removal of top layer of soil is called soil erosion.

The core zone of a Biosphere Reserve is devoted to strict protection of wildlife.

Kanha Tiger Reserve, also known as Kanha–Kisli National Park, is one of the tiger reserves of India and the largest national park of the state of Madhya Pradesh. The present-day Kanha area is divided into two protected areas, Hallon and Banjar, of 250 and 300 square kilometers (97 and 116 sq mi), respectively. Kanha Tiger Reserve hosts populations of tiger, leopard, wild dog, sloth bear, foxes and jackals. Barasingha is adapted to hard ground. Gaur (Bos gaurus) inhabits meadows and waterholes in the park. Blackbuck has become very rare.

Here, all the statements are correct. Hence, your answer will be option [D].

Here, all the statements are correct. Hence, your answer will be option [D].

Here, all the statements are correct. Hence, your answer will be option [D].

Here, all the statements are correct. Hence, your answer will be option [D].

Here, all the statements are correct. Hence, your answer will be option [D].

Deforestation leads to increase in floods. It leads to a decrease in rainfall and water level.

The siberian crane comes to India and is found in Satpura as the weather in Siberia is extreme with scarcity of food and light.

Cycling of cardboard cartons will lead to a decrease in the level of tree cutting and hence conserve forests.

Sariska Tiger Reserve is a national park and tiger reserve in the Alwar district of the state of Rajasthan India and it has reserves of wildlife like leopard, crocodiles, Sambar, Chitel, Nilgai, Chausingha, Wild Boar and Langur.

The Asiatic lion, also known as the Indian lion and Persian lion, is a lion subspecies that lives as a single population in India’s Gujarat State. It is listed as Endangered on the IUCN Red List because of its small population size.