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.

Wildlife sanctuary, national parks are in situ conservation methods of biodiversity. These places are meant for conservation of species in their “Natural Habitat”. The other options i.e., zoological and botanical gardens are ex situ conservation methods. These places conserve the species outside its natural habitat.

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

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.

The domestic yak is a long-haired domesticated bovid found throughout the Himalaya region of southern Central Asia. The yak-rearing states of India are Arunachal Pradesh, Sikkim, Uttar Pradesh, Himachal Pradesh and Jammu and Kashmir.

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.

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

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.

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

Keoladeo National Park or Keoladeo Ghana National Park formerly known as the Bharatpur Bird Sanctuary in Bharatpur, Rajasthan, India is a famous avifauna sanctuary that hosts thousands of birds, especially during the winter season. Over 230 species of birds are known to be resident. Keoladeo Ghana National Park is a man-made and man-managed wetland and one of the national parks of India. The reserve protects Bharatpur from frequent floods, provides grazing grounds for village cattle, and earlier was primarily used as a waterfowl hunting ground.

Project Tiger is a wildlife conservation project which was launched by the government of India in 1972 to protect the tigers in the country. The objective of this project was to ensure the survival and maintenance of the tiger population in specially constituted “Tiger Reserves” throughout India.

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 will cause an increase in temperature of earth’s atmosphere leading to global warming. When a lot of trees are cut down during deforestation then lesser number of trees will be left. As carbon dioxide will increase in the atmosphere. Trapping of heat rays by carbon dioxide increase the temperature of earth’s atmosphere.

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

The snake expensive skin is sold in market for expensive drugs and ointment.

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

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.

Bandipur National Park, an 874-sq.-km forested reserve in the southern Indian state of Karnataka, is known for its small population of tigers.