Class 8 Science

Conservation of Plants & Animals

Extra Questions

Short Answer Type

Question 1: Write a brief note on protected areas?

Answer: Areas which have been demarcated to protect our flora and fauna and their habitat are called protected areas. The government lays down rules, methods and policies to protect and conserve forests and wildlife.

Question 2: What do you understand by endemic species? Give some examples of endemic species.

Answer: Species which is found exclusively in a particular area is called endemic species. Sal and wild mango are endemic flora to Pachmarhi Biosphere Reserve. Bison, Indian giant squirrel and flying squirrel are endemic to this region.

Question 3: State two reasons which can lead to extinction of an endemic species.

Answer: Following can lead to extinction of endemic species:

  1. Destruction of natural habitat
  2. Introduction of an exotic species
  3. Increase in population

Question 4: What are the features members of a species?

Answer: Members of a species show following features:

  1. They look similar
  2. They can interbreed
  3. They can produce fertile offspring among themselves only

Question 5: What are the two reasons for migration of animals?

Answer: Following are the reasons for migration of animals:

Question 6: How does deforestation cause global warming?

Answer: We know that plants take up carbon dioxide and release oxygen during photosynthesis. This helps in maintaining the balance of carbon dioxide and oxygen in the atmosphere. Deforestation results in loss of green cover on the earth. Less number of plants means level of carbon dioxide increases in the atmosphere. Carbon dioxide traps solar energy and thus leads to overall increase in global temperature. Thus, deforestation causes global warming.

Long Answer Type Questions

Question 1: What are the consequences of deforestation?

Answer: Consequences of Deforestation

Question 2: Explain different types of protected areas.

Answer: Different types of protected areas are as follows:

  1. Sanctuary: An area where animals are protected from any disturbance to them or their habitat is called a sanctuary. Poaching (killing) or capturing an animal is strictly prohibited in a wildlife sanctuary.
  2. National Park: Areas reserved for wildlife where they can freely use the habitat and natural resources are called national parks. Satpura National Park is the first reserve forest of India.
  3. Biosphere Reserve: Large areas of protected land for conservation of wildlife, plant and animal resources and traditional life of the tribals living in that area are called biosphere reserves. Some examples of threatened species which are protected in wildlife sanctuaries in India are; black buck, white eyed buck, elephant, golden cat, pink headed duck, gharial, marsh crocodile, python, rhinoceros, etc.