LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – ADV.ZOOLOGY
THIRD SEMESTER – APRIL 2011
AZ 3506 - ENVIRONMENTAL BIOLOGY
Date : 25-04-2011
Time : 1:00 - 4:00
Dept. No.
Max. : 100 Marks
PART – A
Answer ALL questions, each in a few words
10  2 = 20 marks
01. Define abiotic factors of environment. Give two examples.
02. What is the difference between medium and substratum of an organism.
03. Differentiate between plankton and nekton.
04. There are 6556 wild elephants in the Mudumalai forest, which has an area of 100 km 2.
What is the population density of elephants in this area?
05. What is antibiosis? Give an example.
06. Bring out the difference between habitat and niche.
07. Draw a diagram to illustrate food chain.
08. Mention any four environmental conditions to which benthos must adapt.
09. What is the difference between aestivation and hibernation?
10. Define renewable and non-renewable resources of energy, with an example each.
PART B
Answer any FOUR questions, each in about two pages
4  10 = 40 marks
11. Explain the effects environmental temperature on animal growth and distribution.
12. With the help of diagrams describe any two types of growth curves in animal population.
13. Describe the sequence of ecological succession.
14. Discuss the adaptations of deep sea fauna.
15. Briefly discuss the conventional and non-conventional resources of energy.
16. Comment on: (i) Endangered species; (ii) global warming; (iii) Biodiversity;
(iv) Environmental biotechnology
PART C
Answer any TWO questions, each in about 4 pages
2  20 = 40 marks
17. Give an account of the intraspecific and interspecific animal relationships.
18. Discuss the factors affecting the size of an animal population.
19. Describe biogeochemical cycle with reference to nitrogen and carbon.
20. Write explanatory notes on: (i) Forest conservation; (ii) Green house gases.
(iii) Food Chain; (iv) Project Tiger.
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