14000+ MCQs Environment & Ecology(Environment and Ecology)
Total Questions:- 50
Time:- 30 Minutes
MCQ Pattern
Date:- 06/05/2026
1. In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the:
I. decomposer micro-organisms to the surface.
II. nutrients to the surface.
III. bottom-dwelling organisms to the surface.
Which of the statements given above is/are correct?
2. Which one among the following covers the highest percentage of forest area in the world?
3. Environment is a composite state of
4. Concerning the food chains in ecosystems, which of the following kinds of an organism is/are known as decomposer organism/organisms?
I. Virus
II. Fungi
III. Bacteria
Select the correct answer using the codes given below.
5. The mechanism of an Ecosystem involves
6. In the marine environment, the main primary producers are
7. Environment is an indivisible unit which is created by
8. The ecological pyramid that is always upright is
9. The concept of ‘Ecological Transition’ was first used by
10. World Environment Day is celebrated on
11. The measurement unit of ecological foot print is
12. Consider the following statements regarding the phosphorus cycle.
I. Phosphorus is an essential nutrient for plants and animals.
II. It is naturally found in rocks and minerals.
III. Plants directly obtain phosphorus from the atmosphere.
Which among the statements given above is/are correct?
13. A relationship between two organisms in which both organisms benefit is called
14. Arrange the following ecosystems in order of their decreasing productivity with the help of codes given below:
I. Desert
II. Grassland
III. Ocean
IV. Swamp
V. Tropical Moist Deciduous Forest
VI. Tropical Forest
15. In ecological succession, the final stable community is known as
16. In dry regions, the leaf size of a tree becomes smaller. It is so to
17. The functioning of an ecosystem involves
18. Which of the following is not correct about an ecosystem?
19. The primary source of energy in an eco-body is
20. In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the:
I. decomposer micro-organisms to the surface.
II. nutrients to the surface.
III. bottom-dwelling organisms to the surface.
Select the correct answer using the codes given below:
21. Who among the following propounded the 10 per cent law?
22. Which among the following is correct regarding an ecosystem?
23. The actual location or place where an organism lives is called
24. Which one of the following is not a major cause of Wildlife Extinction?
25. An example of ‘Lentic Habitat’ in the freshwater community is
26. 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?
27. The correct order in the food chain of the various components of a terrestrial grass ecosystem is
28. Consider the following statement regarding an ecosystem.
I. A.G. Tansley had used the word ecosystem for the first time.
II. The organisms producing their own food are called as Autotrophs.
III. The consumers prepare their food with the help of photosynthesis.
IV. Decomposers convert inorganic material into organic one.
Which of the statements given above are correct?
29. In which environmental theory is nature considered all-powerful and man is considered a toy in the hands of nature?
30. The word ‘Environment’ had origin from which language?
31. Which of the following are the primary consumers in an ecosystem?
Select the correct answer from the code given below.
I. Ants
II. Deer
III. Fox
IV. Tiger
32. Which of the following is not a biotic component of an ecosystem?
33. When the succession starts under conditions highly unfavourable to plant growth and plants themselves have to create a suitable physical environment for themselves, it is
34. The cycling of elements in an ecosystem is called
35. Who among the following propounded the concept of ecological niche?
36. NPP (Net Primary Productivity) is highest for
37. A succession taking place in an area where there had been no vegetation earlier is called a ... succession.
38. The extension of the Tropical Evergreen biome is
39. Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?
40. A biological community in its environment such as a pond, an ocean, forest, or even an aquarium is known as
41. Which among the following statements is incorrect?
42. The 10 per cent Law is related with
43. Among the biotic components of the ecosystem, the producer system is
44. Which one of the following is the largest ecosystem of the world?
45. The environment is generally classified into several categories. Which among the following is not a part of this common classification in environmental science?
46. The term ‘biomagnification’ means
47. Which of the following is an artificial ecosystem?
48. Most of the desert plants bloom during night because
49. Transfer of energy from one organism to another in an ecosystem takes place in a
50. With reference to food chains in ecosystems, consider the following statements:
I. A food chain illustrates the order, in which a chain of organisms feed upon each other.
II. Food chains are found within the population of a species.
III. A food chain illustrates the numbers of each organism, which are eaten by others.
Which of the statements given above is/are correct?