本题目来源于试卷: SL/HL Topic D4.2 Stability and change，类别为 IB生物学
[单选题]
4. Why does leaching of nitrogen and phosphew-j sco;pz6 qrm4 /27 zyw6j,,zezw sate fertilisers lead to an 5w/rr4 d my;w xl6bxx9increase the Biochemical Oxygen Demand (BOD) of local freshwater ecosystemr/6 l4x yxd; bxrw5w9ms (lakes and rivers)?
A. It increases the rate of photosynthesis of producers.
B. It decreases the population of producers.
C. It increases the population of saprotrophs.
D. It deceases the fish populations.
参考答案: C
本题详细解析:
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