14000+ MCQs Environment & Ecology(Environment and Ecology)
Total Questions:- 50
Time:- 30 Minutes
MCQ Pattern
Date:- 02/08/2026
1. When we eat the flesh of goat, we are a
2. 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?
3. In which environmental theory is nature considered all-powerful and man is considered a toy in the hands of nature?
4. The flow of energy and nutrients in the biogeochemical cycle mainly takes place through
5. Assertion (A) People in polar areas live in houses made up of ice. Reason (R) Climate has impact on human life.
6. If a tropical rainforest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because
7. The functioning of an ecosystem involves
9. The primary source of energy in an eco-body is
10. The large ecological area that is characterized by its climate, soil type, and vegetation and by dominant plants and animals is called
11. Among the biotic components of the ecosystem, the producer system is
12. The correct order of basic process involved in ecological succession is
13. Which among the following is the most stable ecosystem?
14. Which among the following statements regarding ecotone is/are correct?
15. Which of the following statement is correct?
16. In the marine environment, the main primary producers are
17. Who among the following propounded the 10 per cent law?
18. Most of the desert plants bloom during night because
19. The 10 per cent Law is related with
20. All components and individuals in an ecosystem are
21. Which one among the following covers the highest percentage of forest area in the world?
22. 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
23. Assertion (A) Environment is the store of immense force. Reason (R) Environmental elements are created as a result of environmental forces and processes.
24. Which of the following statements regarding the hydrosphere is incorrect?
25. Which of the following is not correct about an ecosystem?
26. The rapid rate of decline in the vulture population in India is mainly due to
27. Which among the following statements is incorrect regarding the components of an ecosystem?
28. Who among the following has used the term ecology for the first time?
29. The following forms of relationship exist between man and his environment according to the development of geographical thought:
I. Environmental determinism
II. Possibilism
III. Neo-determinism
The correct sequence of the development of these forms of relationships is
30. An example of ‘Lentic Habitat’ in the freshwater community is
31. The cycling of elements in an ecosystem is called
32. 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?
33. Consider the following statements:
I. Interactions between the two organisms in which one organism kills and feeds on the second organism, is called parasitism.
II. Mutualism is the way two organisms of different species biologically interact in a relationship in which each individual derives a fitness benefit.
Which of the statements given above is/are true?
34. In ecological succession, the final stable community is known as
35. Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?
36. In ecological succession, the intermediate developmental phase is known as
37. A biological community in its environment such as a pond, an ocean, forest, or even an aquarium is known as
38. 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:
39. Which among the following statements about environment is incorrect?
40. A succession taking place in an area where there had been no vegetation earlier is called a ... succession.
41. Who among the following first enunciated the concept of ecological pyramids in 1927?
42. The term ‘Ecosystem’ was proposed by
43. The extension of the Tropical Evergreen biome is
44. What is the thin layer of gases around the Earth?
45. 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
46. 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?
47. The environment is generally classified into several categories. Which among the following is not a part of this common classification in environmental science?
48. The concept of sustainable development is closely related to
50. 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