ANSWERS FOR Environment Quiz



1. In an area where DDT had been used extensively, the population of birds declined significantly because
A.Cobras were feeding exclusively on birds
B.Many of the birds eggs laid, did not hatch
C.Birds stopped laying eggs
D.Earthworms in the area got eradicated
1.B
2. Which one of the following is a wrong statement?
A. Greenhouse effect is a natural phenomenon
B. Eutrophication is a natural phenomenon in freshwater bodies
C. Most of the forests have been lost in tropical areas
D. Ozone in upper part of atmosphere is harmful to animals
2.D
3. Measuring Biochemical Oxygen Demand (BOD) is a method used for
A.Measuring the activity of Saccharomyces cerevisiae in producing curd on a commercial scale
B.Working out the efficiency of R.B.Cs. about their capacity to carry oxygen
C.Estimating the amount of organic matter in sewage water
D.Working out the efficiency of oil driven automobile engines
3.C
4. dB is a standard abbreviation used for the quantitative expression of
A.The dominant Bacillus in a culture
B.The density of bacteria in a medium
C.A certain pesticide
D.A particular pollutant
4.D
5. Identify the correctly matched pair
A.Basal Convention – Biodiversity Conservation
B.Montreal Protocol – Global warming
C.Kyoto protocol – Climatic change
D.Ramsar Convention – Ground water pollution
5.C
6. Common indicator organism of water pollution is:
A.Entamoeba histolytica
B.Escherichia coli
C.Eichhornia crassipes
D.Lemna paucicostata
6.B
7. Shell of egg in bird becomes thin (not properly formed) due to the pollution of pesticides. This is due to interference in the activity of:
A.Calmodulin
B.Mg ATPase
C.Ca ATPase
D.None of these
7.A
8. Lichens can be used as:
A.Source of wood
B.Initial vegetation for waste lands
C.Bio-indicator for water and air pollution
D.To check the air pollution
8.C
9. Industrial melanism is an example of
A.Protective resemblance with the surrounding
B.Drug resistance
C.Defensive adaptation of skin against UV radiations
D.Darkening of skin due to industries
9.A
10. Carbon dioxide is called green-house gas because it is
A.Transparent to sunlight but traps heat
B.Transparent to heat but traps sunlight
C.Used in green-house to increase plant growth
D.Transparent to both sunlight and heat
10.A
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