LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – ADVANCED ZOOLOGY & BIOTECH.
THIRD SEMESTER – NOVEMBER 2012
AZ 3506/3502 - ENVIRONMENTAL BIOLOGY
Date : 05/11/2012
Time : 9:00 - 12:00
Dept. No.
Max. : 100 Marks
PART – A
Answer ALL questions, each in a few words:
(10 x 2 = 20 marks)
01. What is phototropism?
02. Define edge effect.
03. Name four rocky shore organisms.
04. Illustrate food web.
05. How are wild life managed in India?
06. What is photochemical smog? What are its ill effects?
07. Define plankton.
08. List down any four adaptations of deep sea forms.
09. Give the energy flow diagram of an ecosystem.
10. Suggest some measures to abate water pollution.
PART – B
Answer any FOUR questions, each in about two pages:
(4 x 10 = 40 marks)
11. Define substratum. Briefly explain how soil acts as a substratum.
12. Bring out the significance of the population growth curves.
13. Comment on ecological pyramids.
14. Differentiate renewable resources from non-renewable resources.
15. “The current cycle of global warming is changing the rhythms of climate”. Substantiate. Suggest a
few solutions to reduce global warming.
16. How is sulfur cycled in ecosystems?
PART – C
Answer any TWO questions, each in about four pages:
(2 x 20 = 40 marks)
17. Discuss temperature as an ecological factor.
18. Write an essay on interspecific animal relationships.
19. What is ecological succession? Explain the process of succession with an example.
20. Enumerate the characteristic features of desert. Explain the adaptations of desert animals.
$$$$$$$