Zoology (Semester IV) (CGPA) Examination, 2017
ENVIRONMENTAL BIOLOGY AND TOXICOLOGY
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Day Date: Monday, 24-04-2017 Max. Marks: 70
Time: 02.30 PM to 05.00 PM
N.B. 1). Questions 2 and 6 are Compulsory.
Attempt any two questions from question 4 and 5.
Draw neat labeled diagrams wherever necessary.
Figures to the right indicate full marks.
Q.1 Choose the correct alternative given in the bracket. 14
UV radiations in stratosphere are absorbed by
Ozone Oxygen
So2 Argon
2 Ozone layer of upper atmosphere is being destroyed

So2 Photooxidants
Chlorofluorocarbon Smog
3 Taj Mahal at Agra is damaged by
Sulphur dioxuied Chlorine
Hydrogen Oxygen
4 Disease caused by eating fish in mercury contaminated water
is
Brights disease Minamata disease
Osteoporosis Hashimoto disease
5 Sound becomes hazardous at decibels
Above 30 Above 80
Above 20 Above 50
6 Which of the following is not a greenhouse gas
oxygen CO2
Chlorofluorocarbons Methane
7 Increasing skin cancer and high mutation rate are the result of

Ozone depletion Acid rain
Co2 pollution noise
Q.2 Describe the case study of Bhopal gas tragedy. 14
Q.3 Describe food chain and energy flow in an ecosystem. 07
Page 2 of 2
Describe fresh water ecosystem. 07
Q.4 Explain in brief Conservation of natural resources. 05
Biological indication of pollution. 05
Describe the effects of noise pollution. 04
Q.5 Explain Rain water harvesting system. 07
Describe management of green house 07
Q.6 Short Notes (Any Four) 1
Carbon credits 14
Soil toxic agents
Induced pisciculture
Carbon cycle
Grassland ecosystem
Food colors and preservatives