Environmental Studies Questions and Answers for Competitive Exams | Environmental Studies Quiz Set 25
Questions
1
Mixing height during night is typically in the range
Answer: < few hundred metres
2
At a given urban location, the temperature at an elevation of 25 m above ground is 15 °C. If the inversion conditions prevail and the environmental lapse rate is 1.25 °C per 100 m, the temperature at an elevation of 200 m will be
Answer: 17.25 °C
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3
When the temperature of the atmosphere falls at a rate greater than the dry adiabatic lapse rate, the atmosphere is
Answer: unstable
4
Gross Primary Productivity (GPP) of an ecosystem is
Answer: photosynthetic fixation rate of atmospheric carbon dioxide
5
The oxygen atom species, which reacts with water to form hydroxyl radical, is produced by the photodissociation of
Answer: O3
6
Identify the incorrect statement about carbon isotopes :
Answer: C-13 is used for carbon-dating
7
Among the following insecticides, which one is relatively more soluble in water ?
Answer: Aldicarb
8
Identify the incorrect statement about humus.
Answer: Rate of nitrogen release to plants is slow during warm growing season and fast during winter months
9
Drugs that prevent the formation of bacterial cell wall are
Answer: Beta-lactams
10
The predominant bioparticulate allergens in the air are
Answer: Pollen grains and fungal spores
11
The enhancement of the fitness of a recipient individual by acts that reduce the evolutionary fitness of the donor individual is
Answer: Altruism
12
The change in species composition that is imposed by factors external to the biotic community is known as
Answer: Allogenic succession
15
Which group of following factors determine the discharge of a stream ?
Answer: DWidth, depth and velocity
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