LOYOLA COLLEGE (AUTONOMOUS), CHENNAI 600 034

M.Sc. DEGREE EXAMINATION –  ZOOLOGY

SECOND SEMESTER-APRIL 2004

ZO 2807/ Z  829  ENVIRONMENTAL TOXICOLOGY

19.04.2004

1.00 –4.00                                                                                         Max. 100 Marks

 

 

PART – A                              (10 ´ 2= 20 Marks)

Answer ALL the questions in two or three sentences.

 

1. What is physical poison?
2. What is response relationship?
3. Comment on ‘sludge’.
4. Differentiate bioremediation and biodegradation.
5. What is fluecolation?
6. Differentiate Toxicant and Toxin.
7. Differentiate acute and chronic toxicity.
8. Define ‘Oil sleek’.
9. Differentiate LD₅₀ and LC₅₀.
10. What is ozone hole and how it is formed?

 

PART – B                                                 (4 ´ 10 = 40 Marks)

Answer any FOUR of the following.

11. Toxicology is a multidisciplinary subject –
12. Discuss light and its role in vision of Man.
13. Give an account of soil pollution with a note on prevention.
14. Give an account of sources and impact of carbonmonoxide on man.
15. Give an account of synthetic polymers and their impact on animals.
16. Give an account of airpollutants and its toxicolgical impact on plants and animals.

 

    PART – C                                                 (2 ´ 20 = 40 Marks)

Answer any TWO of the following.

 

17. Write an essay on the classification of pesticides and their impact on fauna and flora.
18. Analyse the impact of heavy metals toxicants on reproduction of animals and add a note on its control methods.
19. Discuss indetail the role of domestic waste as toxicants and treatment of waste water.
20. a) Discuss indetail the role temperature in toxicity.
21. b) impact of industrial waste.

 

 

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