Denitrifying bacteria do not necessarily require abundant oxygen for respiration; therefore, they are:
Correct answer: B. In water-logged soil
- A. In well-aerated soils
- B. In water-logged soil
- C. In root nodules of leguminous plants
- D. On the root surfaces of leguminous plants
Explanation
Denitrifying bacteria thrive in environments where oxygen is limited, such as water-logged soils. These bacteria convert nitrates into nitrogen gas in the absence of oxygen. Therefore, option B is correct as it describes the low-oxygen environment that supports denitrification.Options A, C, and D describe environments where denitrifying bacteria are not typically found or are less active.
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An ecosystem consists of organisms interacting with one another and with abiotic factors such as light, water, soil and temperature. The topic covers populations and communities, food chains and webs, trophic levels, ecological pyramids, energy flow, nutrient cycles and ecological succession.
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