CBSE Biology Ecology And Environment Test 1 Online Practice Quetion Answers
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CBSE Biology Ecology and Environment Test 1 Online

Test Name Ecology and Environment Test
Subject CBSE Biology
Test Type MCQs
Total Question 30
Total Marks 60
Total Time 25 Minutes
Test Help For
  • CBSE Biology.
  • CBSE Board Exams.
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Ecology includes the study of interactions that organisms have with each other, other organisms, and with abiotic components of their environment. It is an interdisciplinary field that includes biology, geography, and Earth science. Ecologists study the interactions between organisms and their environment, and how these interactions affect where, and in what numbers, different types of organisms knowledge. CBSE official take this subject examinations from their affiliated boards.

Take following test online for more preparation and boost your educational Biology science level.

CBSE Biology Ecology and Environment Test 1 Online


1. Which of the following is the most stable ecosystem?

Question 1 of 30

2. Which of the following pair is a sedimentary type of bio geochemical cycle?

Question 2 of 30

3. Which of the following does not have stomata?

Question 3 of 30

4. Highest DDT deposition shall occur in?

Question 4 of 30

5. Species diversity increases as one proceeds from?

Question 5 of 30

6. Drawback of DDT as pesticide is?

Question 6 of 30

7. The pyramid which cannot be inverted in a stable ecosystem is that of?

Question 7 of 30

8. If the forest cover is reduced to half what is most likely to happen on a long term basis?

Question 8 of 30

9. In a food chain the largest population is that of?

Question 9 of 30

10. In grass-deer-tiger food chain grass biomass is one tonne. The tiger biomass shall be?

Question 10 of 30

11. The worst environmental hazards were created by accidents in nuclear power plant and MIC gas tragedy respectively in?

Question 11 of 30

12. When huge amount of sewage is dumped into a rivers its BOD will?

Question 12 of 30

13. The Taj Mahal is threatened due to the effect of?

Question 13 of 30

14. Atmosphere of big/ metropolitan cities is polluted most by?

Question 14 of 30

15. In a biotic community the primary consumers are?

Question 15 of 30

16. The major contributor of green-house gases to the atmosphere is?

Question 16 of 30

17. Sewage drained into water bodies kill fishes because?

Question 17 of 30

18. In Minamata Bay of Japan the animals which remained free from Minamata disease are?

Question 18 of 30

19. Sunken stomata is the characteristic feature of?

Question 19 of 30

20. Animals that can tolerate a narrow range of salinity are?

Question 20 of 30

21. Disease caused by eating fish found in water contaminated with industrial waste having mercury is?

Question 21 of 30

22. The primary succession refers to the development of communities on a?

Question 22 of 30

23. Xeric environment is characterized by?

Question 23 of 30

24. If we completely remove the decomposers from an ecosystem its functioning will be adversely affected because?

Question 24 of 30

25. Which of the following pair is correctly matched?

Question 25 of 30

26. Desert plants are generally?

Question 26 of 30

27. Tropical forests occur in India?

Question 27 of 30

28. Sound becomes hazardous noise pollution at level?

Question 28 of 30

29. Second most important trophic level in a lake is?

Question 29 of 30

30. In a food chain the largest population is that of?

Question 30 of 30


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