Which of the following organisms reduces nitrates in the soil to gaseous nitrogen?

Assessment: WAEC SSCE - Biology - 1992 (Objective) Subject: Biology

Question 1 Report

Which of the following organisms reduces nitrates in the soil to gaseous nitrogen?
Answer Details
The organism that reduces nitrates in the soil to gaseous nitrogen is the denitrifying bacterium. These bacteria convert nitrates into nitrogen gas, which is released into the atmosphere. This process is called denitrification, and it is an essential part of the nitrogen cycle. Without denitrifying bacteria, nitrates would accumulate in the soil, which could lead to problems like eutrophication and decreased soil fertility. In summary, denitrifying bacteria play a crucial role in maintaining a healthy soil environment by converting excess nitrates into nitrogen gas.
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