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.
- What is physical poison?
- What is response relationship?
- Comment on ‘sludge’.
- Differentiate bioremediation and biodegradation.
- What is fluecolation?
- Differentiate Toxicant and Toxin.
- Differentiate acute and chronic toxicity.
- Define ‘Oil sleek’.
- Differentiate LD50 and LC50.
- What is ozone hole and how it is formed?
PART – B (4 ´ 10 = 40 Marks)
Answer any FOUR of the following.
- Toxicology is a multidisciplinary subject –
- Discuss light and its role in vision of Man.
- Give an account of soil pollution with a note on prevention.
- Give an account of sources and impact of carbonmonoxide on man.
- Give an account of synthetic polymers and their impact on animals.
- 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.
- Write an essay on the classification of pesticides and their impact on fauna and flora.
- Analyse the impact of heavy metals toxicants on reproduction of animals and add a note on its control methods.
- Discuss indetail the role of domestic waste as toxicants and treatment of waste water.
- a) Discuss indetail the role temperature in toxicity.
- b) impact of industrial waste.
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