LOYOLA  COLLEGE (AUTONOMOUS), CHENNAI-600 034.

M.Sc. DEGREE  EXAMINATION  – ZOOLOGY

second SEMESTER  – APRIL 2003

ZO 2807 / Z  829   environmental toxicology

           

02.05.2003

1.00 – 4.00                                                                                          Max: 100 Marks

 

PART – A                                       (2 ´ 10 = 20 Marks)

Answer ALL questions

 

1. Comment on aromatic hydrocarbon.
2. Give the names of any four organic acids.
3. Comment on biodegradation and bioaccumulation.
4. Give the name of four herbicide.
5. What is Ozone hole? How is formed?
6. Differentiate domestic waste from Industrial waste.
7. What is biopsy and autopsy?
8. Comment on acute and chronic toxicity.
9. Comment on Toxicity and Toxicant.
10. What is sound? How is it produced?

 

PART – B                                        (4 ´ 10 = 40 Marks)

Answer any four of the following

 

11. Classify pesticides based on the mode of action and the chemical nature.
12. “Toxicology is a multidisciplinary subject” –
13. Discuss briefly the toxicological impact of domestic waste.
14. Analyse the impact of heavy metals in toxicology.
15. Give an account of microorganisms and toxin production.
16. Discuss the impact of light and sound on plants.

 

 

PART – C                                        (2´ 20 = 40 Marks)

Answer any TWO of the following

 

17. Write an essay on the various processes used in the elimination of microbes.
18. Write an essay on the pesticides and its impact on man.
19. Discuss in detail Alicyclic compounds and its degradation and add a note synthetic detergents.
20. Explain the goals of Toxicology and discuss the various factors related to the organism in toxicolog.

 

 

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