Conservation of plants and animals Sample paper

Q1. Hot spots of biodiversity are areas  

Solution

Hot spots of biodiversity are the areas where maximum diversity is found.  

Q2. How many rock shelters have been identified in the Pachmarhi Biosphere Reserve?

Solution

A total of 55 rock shelters has been identified in the Pachmarhi Biosphere Reserve.

Q3. Write any two points to describe the importance of forests.

Solution

Forests are important for us because:(i) They purify the air and control air pollution.(ii) They help in replenishing ground water.

Q4. Total number of identified biodiversity hot spots in the world is :

Solution

Till date, there are 34 terrestrial hot spots that have been identified in the world covering an area less than 2 percent of land surface with about 20 percent of human habitation.

Q5. Which of the following are a threatened species of animals protected in our wildlife sanctuaries?

Solution

The golden cat is one of the threatened species of animals in India and is being protected in our wildlife sanctuaries.

Q6. The process of restoring a forest which once existed but was removed at some point of time in the past is called

Solution

The process of restoring a forest which once existed but was removed at some point of time in the past is called reforestation. Deforestation is the permanent destruction of forests to make land available for some other purpose. Afforestation is the planting of trees for commercial purposes.

Q7. Reduction in rainfall can cause droughts.

  • 1) False
  • 2) True

Solution

True

Q8. Loss of forest cover increases the annual temperature of the Earth.

  • 1) False
  • 2) True

Solution

True

Q9. Which of the following is prohibited in a protected area?

Solution

A protected area is an area in which the natural flora and fauna are protected. This includes national parks, sanctuaries and biosphere reserves. In these protected areas, felling of trees, poaching, hunting, plantation, cultivation and grazing activities are prohibited.

Q10. Conversion of fertile land into a desert is called desertification.

  • 1) False
  • 2) True

Solution

True

Q11. Deforestation can cause both floods and loss of rainfall.

  • 1) False
  • 2) True

Solution

True

Q12. (i) Write any three reasons for cutting trees in forests. (ii) How does carbon dioxide cause global warming?

Solution

(i) The reasons for cutting trees in forests are:a. Procuring land for cultivationb. Building houses and factoriesc. Making furniture or using wood as fuel(ii) Carbon dioxide traps the heat rays reflected by the earth and causes global warming by increasing the temperature on the earth.

Q13. Which of the following is an aim of a zoological park? 

Solution

There are three aims of a zoological park:  1. To increase interest in wildlife 2. To provide recreation and education 3. To conserve endangered species

Q14. Red data books are produced by  

Solution

Red data books are produced by IUCN. A red data book is the list of endangered and rare species of plants, animals and fungi.  

Q15. Which of the following is endemic to the Pachmarhi Biosphere Reserve?

Solution

Bison, Indian giant squirrel and flying squirrel are species endemic to the Pachmarhi Biosphere Reserve.

Q16. List 5 factors which disturb biodiversity.

Solution

Factors which disturb biodiversity: Poaching Agriculture Deforestation Urbanisation Industrialisation 

Q17. Which was the first national park established in India?

Solution

Jim Corbett National Park was established in 1936, and it was named Hailey National Park after its founder Sir Malcolm Hailey. In 1956, in honour of Jim Corbett, who took the initiative for wildlife preservation in India, the Indian Government renamed it as Corbett National Park.

Q18. The lower layer of the soil below the top soil is rich in humus, as the water seeps into it and carries a lot of nutrients with it into the soil.

  • 1) False
  • 2) True

Solution

False. The lower layer of the soil below the top soil is hard and rocky and does not contain humus.

Q19. (i) Scientists and environmentalists continuously emphasize the negative effects of carrying out deforestation. Mention these effects.

(ii) Which of the following cannot be caused by deforestation? Why?

  • (a) Desertification
  • (b) Severe droughts
  • (c) Increase in soil fertility
  • (d) Global warming

Solution

(i) The negative effects of carrying deforestation are:

  • a. It causes increase in the temperature and pollution level on the earth.
  • b. It increases the level of carbon dioxide in the atmosphere whereas the ground water level gets lowered.
  • c. Deforestation disturbs the balance in nature.

(ii) Increase in soil fertility cannot be caused by deforestation. Deforestation causes large amount of soil erosion, due to which the lower, hard and rocky layers get exposed. The fertile soil gets washed away during soil erosion. Hence, soil fertility gets reduced and is not increased during deforestation.

Q20. The Pachmarhi Biosphere Reserve consists of

Solution

The Pachmarhi Biosphere Reserve consists of 1 national park (Satpura) and 2 wildlife sanctuaries (Bori and Pachmarhi).

Q21. How does carbon dioxide cause global warming?

Solution

Carbon dioxide traps the heat rays reflected by the earth and causes global warming by increasing the temperature on the earth.

Q22. In which of the protected areas can one find the presence of tribal people along with the natural flora and fauna?

Solution

In a biosphere reserve, one can find the presence of tribal people living in harmony with the flora and fauna.

Q23. (i) Discuss any two problems that can arise if deforestation continues.(ii) What is the relation between deforestation and obtaining fuel?

Solution

(i) If deforestation continues, rainfall and soil fertility will decrease. In addition, there will be increased chances of natural calamities such as floods and droughts.(ii) Trees are cut down in several countries especially the developing ones, where wood is used as firewood or turned into charcoal, used for cooking and heating purposes which leads to deforestation.