M.Sc. DEGREE EXAMINATION, APRIL 2017
Second Semester
Zoology
ECOLOGY
(2016 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. What is artificial ecosystem? Give examples.
2. Explain briefly the typical food chain of aquatic
ecosystem.
3. What are the sources of nitrogen cycle?
4. Comment on pyramid of energy.
5. What you meant by exponential growth of a population?
6. Explain briefly the global carrying capacity.
7. What is tundra? Give suitable examples.
8. List out any two major animal adaptations of aquatic
ecosystem.
9. What are the sources of aquatic pollution?
10. What is "Three Mile island" disaster?
Sub. Code
509203
RW-199
2
WS3
Part B x 5 25)
Answer all questions, choosing either or
11. Make a note on the abiotic components of an
ecosystem.
Or
Explain briefly the components of detritus food
chain in a terrestrial ecosystem.
12. Write down ecological significance of sulphur cycle.
Or
What is eutrophication? How does it affect the
ecosystem?
13. Write a short note on the life history traits.
Or
Differentiate between immigration and emigration.
14. Illustrate marine ecosystem with examples.
Or
Explain briefly the chemical characteristic features
of aquatic ecosystem.
15. Enlighten briefly the prevention and control of air
pollution.
Or
What is global warming? How does it affect earth's
surface?
RW-199
3
WS3
Part C 10 30)
Answer any three questions.
16. Write an essay on the food chain in different ecosystems.
17. Describe in detail the any two important biogeochemical
cycles.
18. Explain various environmental and social factors
influence the growth of population.
19. Describe the characteristics of non-renewable natural
resources.
20. List out the sources of water pollution. Explain the
control of water pollution and water recycling.
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