2
QuizMultiple Choice

Natural Resources — Test

Question 2 • Earth and Space Science

A wetland has been drained and paved over to make room for housing and a retail center. Which bacterial function is most likely to decrease?

Answer
A
the breakdown of organic matter into ammonium
B
the conversion of ammonia into nitrite
C
the return of nitrogen gas to the atmosphere
D
the fixation of nitrogen into ammonia

Explanation

Wetlands often have waterlogged, oxygen-poor soils, where denitrifying bacteria convert nitrate into nitrogen gas that returns to the atmosphere. Draining and paving the wetland removes much of this habitat, so that function is most likely to decrease. Nitrification (ammonia to nitrite) generally occurs in oxygen-rich conditions, so it is not the best choice.

AI-written and checked against the verified answer.

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