LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – ZOOLOGY

TS 9

FOURTH SEMESTER – APRIL 2006

                                                  ZO 4501 – ENVIRONMENTAL BIOLOGY

(Also equivalent to ZOO 507)

 

 

Date & Time : 27-04-2006/9.00-12.00         Dept. No.                                                       Max. : 100 Marks

 

 

Part A                                     (Answer All)                                      10 ´ 2 = 20

1. Distinguish autcology from synecology.
2. Define the term: Thermocline.
3. What is division of labour? Give an example.
4. What is meant by Shelford’s law of tolerance?
5. What is a sere and a seral stage?
6. Distinguish grazing food chain from detritus food chain.
7. What is a holoplanklton? Give an example.
8. What are endangered species? Give two examples.
9. What is synergism?
10. Define the term: Exobiology.

 

Part B                                     (Answer any four)                             4 ´ 10 = 40

11. Describe biological effects of temperature.
12. Give an account of social life in honeybees.
13. Explain types of ecological pyramids.
14. Give an account on adaptations of rocky shore fauna.
15. Describe nitrogen cycle with a flow chart.
16. Tabulate different types of natural resources and their importance.

Part C                                     (Answer any two)                              2 ´ 20 = 40

17. Write an essay on interspecific animal relationship with suitable examples.
18. Give an account on pond as an ecosystem.
19. Explain biological attributes of animal population.
20. Describe the various methods of conservation of natural resources.

 

 

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