EMT 201 CBT PRACTICE

1. The first principle of trophic levels states that:

2. A layer of rocks formed by the cooling and solidification of molten material is classified as:

3. In the hydrosphere, the percentage of water locked in the lithosphere is approximately:

4. The ecosystem’s productivity is positively correlated with:

5. The term used to describe the sequential changes in vegetation communities over time is:

6. A natural process introducing inheritable variations in species is:

7. The cyclic transfer of energy, water, and nutrients in the biosphere occurs through:

8. Forest fires affecting vegetation and soil stability is an example of:

9. The ozone layer protects life on earth by:

10. The main driving force of the ecosystem is:

11. The ability of an ecosystem to resist or recover from disturbances is called:

12. The cycling of inorganic and organic substances in the biosphere is called:

13. Soil formation caused by plant roots growing in rock fissures is an example of:

14. A climax community in succession represents:

15. An example of a trophic level where energy flow decreases due to respiration losses is:

16. The thin layer where life exists on earth is called:

17. The zone of the atmosphere where temperatures may drop to -90°C is:

18. The principle stating that current physical and biological processes have operated since the earth's origin is called:

19. A process involving gradual accumulation and hardening of sediments forms:

20. The major agents responsible for chemical weathering are:

21. A mature ecosystem with high species diversity is known for its:

22. The climatic condition regulated by the atmosphere to sustain life is mainly due to:

23. The zone of the atmosphere with ionized particles is:

24. The layer of the atmosphere that contains the ozone layer is:

25. A stable ecosystem with intricate food webs is characterized by:

26. According to E.P. Odum, ecosystem stability increases with:

27. The role of decomposers in an ecosystem is to:

28. The fundamental unit that facilitates interaction between biotic and abiotic components is called:

29. The type of interaction where species benefit mutually is:

30. The ecological concept that allows the system to return to stability after external changes is called:

31. The transfer of energy in an ecosystem follows:

32. The process by which solar energy is converted into chemical energy by green plants is:

33. A type of rock formed by heat and pressure altering existing rocks is called:

34. The finite nature of earth's resources emphasizes the principle of:

35. The physical environment and living organisms collectively form the:

36. The concept introduced by UNESCO to conserve biodiversity is:

37. The troposphere extends up to approximately:

38. An ecosystem modified by human activity is referred to as:

39. A food chain begins with:

40. The rapid decline in biodiversity due to habitat destruction is a result of: