DISTANCE EDUCATION
M.Sc. (Zoology) DEGREE EXAMINATION, MAY 2016.
ENVIRONMENTAL BIOLOGY
Time Three hours Maximum 100 marks
SECTION A — 8 40 marks)
Answer any FIVE questions.
All questions carry equal marks.
1. Brief note on ecological pyramid.
2. Define eutrophication and write short notes on
consequences due to eutrophication.
3. What are the factors influencing the biogeochemical
cycles?
4. Define natality, mortality and growth rate relevant to
population.
5. Explain the biotic features of terrestrial ecosystem.
6. Write a note on conservation of natural resources.
7. Brief note on acid rain.
8. Write the importance of environmental laws.
SECTION B — 15 60 marks)
Answer any FOUR questions.
All questions carry equal marks.
9. Discuss elaborately the energy flow and structure of
trophic ecosystem.
10. Discuss the general account of complete and incomplete
biogeochemical cycles.
Sub. Code
21
DE-3934
WS
2
11. Write an essay on ecological succession and explain
monoclimax and polyclimax theories.
12. Briefly explain the physical and biotic features of
terrestrial and freshwater habitats.
13. Elaborate the factors influencing the aquatic pollution
and its effects on living organisms.
14. Enumerate the role of microbes in bioremediation
15. Describe the principles of environmental conservation
with suitable example.