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Biology Laboratory Manual, 6/e
Darrell S. Vodopich, Baylor University
Randy Moore, University of Minnesota--Minneapolis

Exercise 22 - Pollution

Choose the one answer that best answers the question.



1

What is a physical or chemical agent that decreases the aesthetic value, economic productivity, or health of the biosphere?
A)pollutant
B)pesticide
C)eutrophication
D)environmental resistance
2

Which of the following types of pollutants affects the pH levels of water and soil?
A)acid precipitation
B)pesticides
C)thermal pollution
D)ozone depletion
3

Which of the following types of pollutants directly affects the growth of shrimp by decreasing oxygen supply in water?
A)acid precipitation
B)pesticides
C)thermal pollution
D)ozone depletion
4

Which of the following is a source of the nitrates and sulfates that cause acid rain?
A)raw sewage
B)fertilizers
C)factories using water to cool equipment
D)automobile emissions
5

After planting 213 seeds and subjecting them to an acid environment, only 23 seeds germinated. What was the percentage of germination?
A).11
B)11%
C)4899
D)9.3
6

What is eutrophication?
A)the nutrient enrichment of lakes and ponds
B)the decrease in the pH of a lake or pond
C)the increase of water temperature of a lake or pond
D)the depletion of nutrients in lakes and ponds
7

Which of the following is a potential cause of eutrophication?
A)auto emissions which release nitrates
B)nitrates found in fertilizers and raw sewage
C)pesticides
D)Allium
8

In what way does thermal pollution affect organisms?
A)lowers the pH of water
B)interrupts normal physiological pathways
C)decreases oxygen supply in water
D)increases oxygen supply in water
9

Which of the following pollutants would the Allium Test be useful to measure their effects on living organisms?
A)pesticides
B)acid rain
C)thermal pollution
D)all of the above
10

When taking a sample of water from a local pond, an environmentalist looked at 10 fields on a filter, each measuring 7 mm2, and found at total of 55 algae. From this information what can you conclude about the pond?
A)The pond is exhibiting signs of water pollution.
B)The pond's water temperature is too high.
C)The pond does not exhibit any sign of pollution.
D)There is not enough information to make a clear conclusion.








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