14000+ MCQs Environment & Ecology(Environment and Ecology)
Total Questions:- 50
Time:- 30 Minutes
MCQ Pattern
Date:- 17/03/2026
1. In dry regions, the leaf size of a tree becomes smaller. It is so to
2. The cycling of elements in an ecosystem is called
3. The large ecological area that is characterized by its climate, soil type, and vegetation and by dominant plants and animals is called
4. Environment is an indivisible unit which is created by
5. 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?
6. The measurement unit of ecological foot print is
7. Which of the following statements regarding the hydrosphere is incorrect?
8. 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
9. Environment is a composite state of
10. If the amount of energy or biomass or the population of organisms at successive trophic levels is plotted as horizontal bars one above the other, it produces a
11. In ecological succession, the intermediate developmental phase is known as
12. Who among the following propounded the 10 per cent law?
13. The flow of energy and nutrients in the biogeochemical cycle mainly takes place through
14. Which one among the following covers the highest percentage of forest area in the world?
15. A succession taking place in an area where there had been no vegetation earlier is called a ... succession.
16. Which among the following is correct regarding an ecosystem?
17. Assertion (A) People in polar areas live in houses made up of ice. Reason (R) Climate has impact on human life.
18. In an ecotone, the species which become abundant are called
19. World Environment Day is celebrated on
20. Which one of the following is the best description of the term ecosystem?
21. The ecological pyramid that is always upright is
22. Which one of the following organisms is likely to show the highest concentration of DDT, once it has been introduced in the ecosystem?
23. The primary source of energy in an eco-body is
24. The concept of ‘Ecological Transition’ was first used by
25. Who of the following used the term ‘deep ecology’ for the first time?
26. Who among the following first enunciated the concept of ecological pyramids in 1927?
27. The word ‘Environment’ had origin from which language?
28. The term ‘biomagnification’ means
29. Study of a single species and the environmental factors in its habitat is called
30. The rapid rate of decline in the vulture population in India is mainly due to
31. The minimum area of land required to completely sustain the life of a person is called their
32. A biological community in its environment such as a pond, an ocean, forest, or even an aquarium is known as
33. 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?
34. Consider the following statements regarding ecological pyramids:
I. It was propounded by Charles Elton in 1927.
II. It shows the relationship between primary producer and consumers in the context of number, biomass, and energy.
Which among the above given statements is/are incorrect?
35. 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
36. NPP (Net Primary Productivity) is highest for
37. An example of ‘Lentic Habitat’ in the freshwater community is
38. Which one of the following ecosystem covers the largest areas of the earth’s surface?
39. Which among the following is the most stable ecosystem?
40. A relationship between two organisms in which both organisms benefit is called
41. 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?
42. The mechanism of an Ecosystem involves
44. Who among the following has used the term ecology for the first time?
45. The succession may begin in an area where some natural disaster has caused removal of existing vegetation. Such a succession is called
47. Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?
48. The ecological pyramid of numbers or biomass has a lesson for us that we should have ... food habits.
49. Consider the following statements:
I. In a single habitat there can be many niches which can sustain many organisms.
II. Every species has its specialized niche.
III. In ecotone there are few species which are specialized for that ecotone.
Which among the statements given above is/are correct?
50. The extension of the Tropical Evergreen biome is