本题目来源于试卷: IB ESS Unit 2: Ecosystems & Ecology，类别为 IB环境系统与社会
[单选题]
Identify which of the fo ) n t)rqdmhc:xkyfva(. t7p;(llowing is not a human-inducb0.m/b ,n +/bx.c(e3qrqv-trr t olq red effect on the nitrogen cyx0ml/ rtr( /rb.3on qcq-.rbbvt ,+q ecle.
A. Fixation of nitrogen for the production of fertilizers.
B. Eutrophication of freshwater bodies.
C. Burning of fossil fuels releases gases that can cause acid rain.
D. Uptake of nutrients from the soil by specialized bacteria.
参考答案: D
本题详细解析:
In the nitrogen cycle, soil bf7+q p,z axt:-dp pdmfnc+(5l acteria convert ammonia to nitrates which can then be taken up by 7+cfp(n:tpldf,m -x+ 5z qdapplants. This is part of the natural cycle of nitrogen and not a human-induced effect on the nitrogen cycle.
Industrial production and use of fertilizers increase the amount of nitrogen in the soil and water bodies of agricultural regions (Option A).
The use of fertilizers can lead to runoff of water containing nitrogen into neighboring water bodies, leading to eutrophication (Option B).
Burning of fossil fuels releases not only carbon but also nitrogen as nitrogen oxides, which can react with water to form nitric acid, decreasing the pH of streams and rivers (Option C).
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