Acetate is added to sites that have both Uranium and Iron in subsurface, which:
A. gets oxidized and it oxidizes both Iron and Uranium rendering them immobile
B. gets oxidized and it reduces both Iron and Uranium rendering them immobile
C. is oxidized by Geobacter and the consequent products immobilize Iron and Uranium
D. is more effective than addition of lactate when it comes to Uranium sequestration
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Which of the following intermediates is the last step in biodegradation of many aromatic compounds, because upon its degradation the aromatic ring breaks and is easily degraded:
A. benzendiol
B. catechol
C. benzoate
D. o-cresol
反硝化作用的最终产物是;()
A. NH3
B. HNO3
C. N2
D. HNO2
将某放线菌与某细菌的成熟培养液按1:5的比例混合后取1mL均匀涂布至普通营养琼脂培养基表面,并在30-35℃培养箱中倒置培养24小时观察,发现平板表面形成一层均匀的菌苔;继续倒置培养24小时后再次观察,发现一些表面干燥的菌落周围出现透明圈。这一结果说明两种微生物之间的关系为:()
A. 互生关系
B. 共生关系
C. 寄生关系
D. 拮抗关系
大肠杆菌与大肠杆菌噬菌体之间的关系为:()
A. 互生关系
B. 共生关系
C. 寄生关系
D. 拮抗关系