alleryStart learning →One of the worst dead zones lies off the coast of the United States. Which river basin feeds it?
AThe Colorado River basin
BThe Columbia River basin
CThe Hudson River basin
DThe Mississippi River basin
Answer & Solution
Correct answer: D. The Mississippi River basin
1. A dead zone is an area stripped of its normal flora and fauna by oxygen depletion.
2. More than 400 such zones were counted worldwide as of 2008.
3. One of the worst sits in the Gulf of Mexico.
4. Fertilizer runoff carried down the Mississippi River basin created it.
5. It covers more than 8463 square miles.
_Source: OpenStax Biology 1e (CC BY 4.0), Chs 44 and 46, section 46.3 Biogeochemical Cycles_
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