How do many exotic species find their way to new waters?
a. Migrations
b. Carried in the ballast water of tankers
c. Marine birds
d. Storms
ANS: B
Sometimes these species out-compete native species. When they enter an area, they often cause a
decline in the biodiversity of the community. Information can be found in the section Marine
Pollutants May Be Natural or Human Generated.
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Improved farm equipment and technology introduced during the Industrial Revolution resulted in fewer farm workers needed in rural areas and a major rural-to-urban shift in the population.
a. true b. false
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