MCQ on Ecology: Environment and Ecology Quiz

Question 1. Which one of the following is the best description of the term ‘ecosystem’?

(A) A community of organisms interacting with one another

(B) That part of the Earth which is inhabited by living organisms

(C) A community of organisms together with the environment in which they live

(D) Flora and fauna of a geographical area

Question 2. Which of the following is not true about the ecosystem?

(A) It represents all living organisms and physical environment in any given space-time unit

(B) It is a functional unit

(C) It has own productivity

(D) It is a closed system

Question 3. The term Ecosystem was proposed by?

(A) G. Tailor

(B) E. Hartigan

(C) D.R. Stoddart

(D) Tansley

Question 4. ‘Ecology’ is the study of relationship between?

(A) Organism and environment

(B) Man and forest

(C) Soil and water

(D) Husband and wife

Question 5. Which of the following is an artificial ecosystem?

(A) Rice field

(B) Forest

(C) Grassland

(D) Lake

Question 6. Which of the following is an artificial ecosystem?

(A) Ponds

(B) Field

(C) Forest

(D) None of these

Question 7. Which one of the following terms describes not only the physical space occupied by an organism, but also its functional role in the community of organisms?

(A) Ecotone

(B) Ecological niche

(C) Habitat

(D) Home range

Question 8. The number of organisms that can be supported by the environment in a given area is known as?

(A) Population

(B) Carrying Capacity

(C) Pyramid of number or biomass

(D) None of the above

Question 9. Which one of the following is the largest ecosystem of the world?

(A) Ocean

(B) Grassland

(C) Forest

(D) Mountains

Question 10. Which one of the following ecosystems covers the largest area of the earth’s surface? 

(A) Desert Ecosystem

(B) Grassland Ecosystem

(C) Mountain Ecosystem

(D) Marine Ecosystem

Question 11. Which one of the following is one of the main causes of ecological imbalance in India?

(A) Deforestation

(B) Desertification

(C) Floods and Famines

(D) Rainfall variations

Question 12. Which of the following does not help to maintain ecological balance?

(A) Cutting forest

(B) Afforestation

(C) Rainwater Management

(D) Biosphere Reserves

Question 13. The highest trophic level in an ecosystem is obtained by?

(A) Herbivores

(B) Carnivores

(C) Omnivores

(D) Decomposers

Question 14. Which of the following is an act that disturbs the ecological balance?

(A) Lumbering

(B) Social forestry

(C) Vanamahotsav

(D) Afforestation

Question 15. The primary source of energy in Eco-body is?

(A) Energy emitted by fermentation

(B) Preserved vegetable sugar

(C) Solar energy

(D) None of the above

Question 16. Which of the following is not a biotic component of an ecosystem?

(A) Air

(B) Plant

(C) Bacteria

(D) Animals

Question 17. 10% law is related with?

(A) Transfer of energy as food from one trophic level to another

(B) Transfer of heat from one matter to another

(C) Transfer of birds from one zone to another

(D) Transfer of water from one zone to another

Question 18. In a food chain, man is?

(A) Producer

(B) Only primary consumer

(C) Only secondary consumer

(D) Primary as well as secondary consumer

Question 19. Among the biotic components of the ecosystem, the producer system is?

(A) Cow

(B) Peacock

(C) Tiger

(D) Green plants

Question 20. In the marine environment, the main primary producers are?

(A) Phytoplanktons

(B) Seaweeds

(C) Marine angiosperms

(D) Aquatic bryophytes

Question 21. Which one of the following pairs is correctly matched?

(A) Mountain – Most stable ecosystem

(B) Abiotic component – Bacteria

(C) Green plants – Ecosystem

(D) Rainfall – Global warming

Question 22. Trophic level I includes?

(A) Herbivorous animals

(B) Carnivorous animals

(C) Omnivorous animals

(D) Green plants

Question 23. Which of the following constitute a food chain?

(A) Grass, wheat and mango

(B) Grass, goat and human

(C) Goat, cow and elephant

(D) Grass, fish and goat

Question 24. The correct order in the food chain of the various components of a terrestrial grass ecosystem is? 

(A) Grass, grasshopper, frog, snake

(B) Grass, grasshopper, snake, frog

(C) Grasshopper, frog, grass, snake

(D) Grasshopper, snake, frog, grass

Question 25. Which one of the following organisms is likely to show the highest concentration of DDT, once it has been introduced into the ecosystem?

(A) Grasshopper

(B) Toad

(C) Snake

(D) Cattle

Question 26. Biomass Pyramid is reversed in which type of ecosystem?

(A) Forest

(B) Pond

(C) Grassland

(D) Drylands

Question 27. Which one of the following trees is considered to be an environmental hazard?

(A) Babul

(B) Amaltas

(C) Neem

(D) Eucalyptus

Question 28. Which one of the following trees is not Eco-friendly? 

(A) Babul

(B) Eucalyptus

(C) Neem

(D) Pipal

Question 29. The transitional zone between two distinct communities is known as?

(A) Ecotype

(B) Arcade

(C) Ecosphere

(D) Ecotone

Question 30. The example of ‘Lentic Habitat’ in the freshwater community is?

(A) Ponds and swamps

(B) Waterfalls and rivers

(C) Ponds and rivers

(D) All of the above