NCERT Class 12 Biology Chapter 15 Biodiversity and its Conservation

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NCERT Class 12 Biology Chapter 15 Biodiversity and its Conservation

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Biodiversity and its Conservation

Chapter: 15

BIOLOGY

UNIT – V ECOLOGY AND ENVIRONMENT

EXEMPLAR PROBLEMS

MULTIPLE CHOICE QUESTIONS

1. Which of the following countries has the highest biodiversity?

(a) Brazil.

(b) South Africa. 

(c) Russia. 

(d) India.

Ans: (a) Brazil.

2. Which of the following is not a cause for loss of biodiversity?

(a) Destruction of habitat.

(b) Invasion by alien species.

(c) Keeping animals in zoological parks.

(d) Over-exploitation of natural resources.

Ans: (c) Keeping animals in zoological parks.

3. Which of the following is not an invasive alien species in the Indian context?

(a) Lantana.

(b) Cynodon.

(c) Parthenium.

(d) Eichhornia.

Ans: (c) Cynodon.

4. Where among the following will you find pitcher plant?

(a) Rain forest of North-East India.

(b) Sunderbans.

(c) Thar Desert.

(d) Western Ghats.

Ans: (a) Rain forest of North-East India.

5. Which one of the following is not a major characteristic feature of biodiversity hot spots?

(a) Large number of species.

(b) Abundance of exotic species.

(c) Large number of exotic species.

(d) Destruction of habitat.

Ans: (d) Destruction of habitat.

To 6. Match the animals given in column A with their location in column B:

Column A	Column B
(i) Dodo	(a) Africa
(ii) Quagga	(b) Russia
(iii) Thylacine	(c) Mauritius
(iv) Stellar’s sea cow	(d) Australia

Choose the correct match from the following:

(a) (i) (a), (ii)-(c), (iii)-(b), (iv) (d) 

(b) (i)-(d), (ii)-(c), (iii)-(a), (iv)-(b)

(c) (i)-(c), (ii)-(a), (iii)-(b), (iv)

(d) (i)-(e), (ii)-(a), (iii)-(d), (iv)-(b)

Ans: (d) (i)-(c), (ii)-(a), (iii)-(d), (iv)-(b).

7. What is common to the following plants Nepenthes, Psilotum, Rauwolfia and Aconitum?

(a) All are ornamental plants.

(b) All are phylogenic link species. 

(c) All are prone to over exploitation.

(d) All are exclusively present in the Eastern Himalayas.

Ans: (c) All are prone to over exploitation.

8. The one-horned Rhinoceros is specific to which of the following sanctuary:

(a) Bhitar Kanika.

(b) Bandipur.

(c) Kaziranga.

(d) Corbett Park.

Ans: (c) Kaziranga.

9. Amongst the animal groups given below, which one has the highest percentage of endangered species?

(a) Insects.

(b) Mammals.

(c) Amphibians.

(d) Reptiles.

Ans: (c) Amphibians.

10. Which one of the following is an en-dangered plant species of India? 

(a) Rauwolfia serpentina.

(b) Santalum album (Sandal wood).

(c) Cycas beddonei.

(d) All of these.

Ans: (d) All of these.

11. What is common to Lantana, Eichhornia and African catfish?

(a) All are endangered species of India.

(b) All are key stone species.

(c) All are mammals found in India.

(d) All the species are neither threatened nor indigenous species of India.

Ans: (d) All the species are neither threatened nor indigenous species of India.

12. The extinction of passenger pigeon was due to: 

(a) Increased number of predatory birds.

(b) Over exploitation by humans. 

(c) Non-availability of the food. 

(d) Bird flu virus infection.

Ans: (b) Over exploitation by humans. 

13. Which of the following statements is correct? 

(a) Parthenium is an endemic species of our country.

(b) African catfish is not a threat to indigenous catfishes. 

(c) Stellar’s sea cow is an extinct animal.

(d) Lantana is popularly known as carrot grass. 

Ans: (b) African catfish is not a threat to indigenous catfishes.

14. Among the ecosystem mentioned below, where, can one find maximum biodiversity?

(a) Mangroves.

(b) Desert.

(c) Coral reefs.

(d) Alpine meadows.

Ans: (c) Coral reefs. 

15. Which of the following forests is known as the lungs of the planet Earth’?

(a) Taiga forest.

(b) Tundra forest.

(c) Amazon rain forest.

(d) Rain forests of North East India.

Ans: (c) Amazon rain forest. 

16. The active chemical drug reserpine is obtained from:

(a) Datura.

(b) Rauwolfia.

(c) Atropa.

(d) Papaver.

Ans: (c) Rauwolfia.

17. Which of the following group of 1810 2 plants exhibit more species diversity? 

(a) Angiosperms.

(b) Algae.

(c) Bryophytes.

(d) Fungi.

Ans: (d) Fungi.

18. Which of the below mentioned regions exhibit less seasonal variations?

(a) Tropics.

(b) Temperates.

(c) Alpines.

(d) Both (a) & (b).

Ans: (a) Tropics.

19. The historic convention on Biological Diversity held in Rio de Janeiro in 1992 is known as:

(a) CITES Convention.

(b) The Earth Summit.

(c) G-16 Summit.

(d) MAB Programme.

Ans: (b) The Earth Summit.

20. What is common to the techniques

(i) in vitro fertilisa- tion.

(ii) Cryo-preservation. and 

(iii) tissue culture?

(a) All are in situ conservation methods.

(b) All are ex situ conservation methods.

(c) All require ultra modern Buy equipment and large space.

(d) All are methods of conservation of extinct organisms.

Ans: (b) All are ex situ conservation methods.