NCERT Class 11 Chapter 15 Geography Life on the Earth MCQ

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1. Name the largest terrestrial community of plants and animals in interaction with the environment

A. biome

B. forest

C. ecosystem

D. none of these

2. Name the famous animal of savanna of Australia

A. monkey

B. giraffe

C. kangaroos

D. none of these

3. Which biome supports the greatest variety of hoofed herbivore species?

A. savanna

B. tropical Savanna

C. taiga

D. tundra

4. The other name of Mediterranean scrub forest is

A. chapparal

B. prairies

C. grassland

D. none of these

5. Name the grassland of South Africa

A. steppes

B. prairies

C. chapparal

D. velds

6. Name the tropical forest in India

A. tundra

B. tarai

C. steppes

D. none of these

7. The sun-loving woody climbers on trees, espcially in tropical rain forests are known as

A. lianas

B. grassland

C. velds

D. tarai

8. The interacting system of the biotic community and the physical environment is known as

A. ecosystem

B. biosphere

C. biome

D. none of these

9. Name the multicellular animal consumers

A. Animalia

B. Annelida

C. homosapiens

D. none of these

10. The imbalance in ecosystem is caused by

A. man

B. natural disasters

C. both of these

D. none of these

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11. Give the name to the negative interaction of organisms within the biotic environment:

A. succession

B. competition

C. interrelation

D. none of these

12. The mutually beneficial association of two dissimilar organisms is known as

A. mutualism

B. food web

C. pyramid

D. food chain

13. What name is given to the network of food chains?

A. pyramid

B. tropical levels

C. food levels

D. food web

14. Name the second-order consumers like tiger which depend on flesh for food

A. herbivores

B. carnivores

C. producers

D. none of these

15. The green plants which produce carbohydrates by photosynthesis are known as

A. producers

B. herbivores

C. both of them

D. none of them

16. Each step in the food chain of organisms is known as

A. trophic level

B. pyramid

C. food chain

D. none of these

17. Name the multicellular decomposers

A. algae

B. fungi

C. mosses

D. none of these

18. The shallow zone of life at the earth’s surface is known as

A. atmosphere

B. biosphere

C. hydrosphere

D. none of these

19. Which one is the geochemical element of the biosphere?

A. nitrogen

B. oxygen

C. carbon

D. all of these

20. Which element is the essential constituent of amino acids, nucleic acids, proteins, etc.?

A. oxygen

B. carbon

C. nitrogen

D. none of these

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21. By which process the bacteria converts nitrates into free nitrogen

A. nitrification

B. photosynthesis

C. nitration

D. denitrification

22. All living organisms maintain circulation of water in solid, liquid or gaseous state, referred to as

A. hydrologic cycle

B. carbon cycle

C. oxygen cycle

D. water cycle

23. How many types of biogeochemical cycles are there?

A. three

B. two

C. four

D. none of these

24. Name the main by-product of photosynthesis

A. carbon

B. hydrogen

C. oxygen

D. water

25. Oxygen combines with nitrogen to form

A. nitrates

B. nitrogen oxide

C. both of them

D. none of these