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 the statement that isv3 thv; nmcxm1lbx:; 2 not true of dt8*u.kczz; mdenitrifying bacteria.
A. Denitrifying bacteria are found in waterlogged soils.
B. Denitrifying bacteria reduce nitrate ($NO_3$)to nitrogen ($NO_2)$
C. Denitrifying bacteria are involved in nitrogen fixation.
D. Denitrifying bacteria are involved in adding small amounts of nitrogen to the atmosphere.
参考答案: C
本题详细解析:
Nitrogen fixation is carried out by bacteria that convert atmospherip 9pgp4+dlg9ygs0(vg c nitrogen top dsgpgg(0 vg9y49l p+ ammonia ($NH_3$) or ammonium ($NH^{4+}$) +which can be used by some plants. An example would be Rhizobium living in nodules in the roots of leguminous plants like peas, beans and lentils.
All other options (A, C and D) are true of denitrifying bacteria.
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