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
- Comment on aromatic hydrocarbon.
- Give the names of any four organic acids.
- Comment on biodegradation and bioaccumulation.
- Give the name of four herbicide.
- What is Ozone hole? How is formed?
- Differentiate domestic waste from Industrial waste.
- What is biopsy and autopsy?
- Comment on acute and chronic toxicity.
- Comment on Toxicity and Toxicant.
- What is sound? How is it produced?
PART – B (4 ´ 10 = 40 Marks)
Answer any four of the following
- Classify pesticides based on the mode of action and the chemical nature.
- “Toxicology is a multidisciplinary subject” –
- Discuss briefly the toxicological impact of domestic waste.
- Analyse the impact of heavy metals in toxicology.
- Give an account of microorganisms and toxin production.
- Discuss the impact of light and sound on plants.
PART – C (2´ 20 = 40 Marks)
Answer any TWO of the following
- Write an essay on the various processes used in the elimination of microbes.
- Write an essay on the pesticides and its impact on man.
- Discuss in detail Alicyclic compounds and its degradation and add a note synthetic detergents.
- Explain the goals of Toxicology and discuss the various factors related to the organism in toxicolog.