LOYOLA  COLLEGE (AUTONOMOUS), CHENNAI-600 034.

B.Sc. DEGREE  EXAMINATION  – ZOOLOGY

fourth SEMESTER  – APRIL 2003

ZO 4501/ ZOO 507 environmental  biology    

16.04.2003

9.00 – 12.00                                                                                        Max : 100 Marks

 

 

SECTION – A                                (10 ´ 2 = 20 marks)

1. Answer ALL the following questions.

 

1. Distinguish phototaxis from photokinesis.
2. What is Division of Labour? Give an example.
3. Define the term Ecological niche with an example.
4. What is Ecotone?
5. Distinguish holoplankton from meroplankton.
6. What is biological magnification?
7. What is synergism? Give an example
8. What is global warming?
9. What is Pedology?
10. What is Cyclomorphosis?

 

SECTION – b                                 (4 ´ 10 = 40 Marks)

answer any four of the following.

11. Give an account of biological effects of temperature.
12. What are ecological pyramids? Describe the different pyramids.
13. Explain the biological attributes of animal population.
14. Describe the nitrogen cycle with a flow chart.
15. Give an account of sanctuaries and national parks of India.
16. a) What is Chronobiology? Explain
17. What is food chain? Describe

 

SECTION– C                                 (2 ´ 20 = 40 Marks)

Answer any TWO of the following.

 

17. What is Interspecific Relationship? Classify them with suitable examples.
18. Describe components of an ecosystem with pond as an example.
19. What are pollutants? Explain in detail air pollution and its effects on biota.
20. Give an account of adaptations of rocky shore fauna.

 

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