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GACE Biology (256 (026/027)) Practice Tests & Test Prep by Exam Edge - Free Test


Our free GACE Biology (256 (026/027)) Practice Test was created by experienced educators who designed them to align with the official Georgia Assessments for the Certification of Educators content guidelines. They were built to accurately mirror the real exam's structure, coverage of topics, difficulty, and types of questions.

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GACE Biology - Free Test Sample Questions

Nitrospira and Nitrosomonas are what?

Correct Answer:
bacteria.


the correct answer to the question "nitrospira and nitrosomonas are what?" is "bacteria." nitrospira and nitrosomonas are both types of nitrifying bacteria that play crucial roles in the nitrogen cycle, particularly in aquatic and soil ecosystems.

nitrosomonas are bacteria that oxidize ammonia into nitrite. this is a critical step in the nitrogen cycle called ammonia oxidation. ammonia (nh3), which can be toxic to aquatic life and plants in high concentrations, is produced from organic matter decomposition and other sources such as agricultural runoff. nitrosomonas use ammonia as an energy source, converting it into nitrite (no2-), which is less toxic.

following the action of nitrosomonas, nitrospira bacteria take over to perform the next step in the nitrification process. nitrospira oxidize nitrite into nitrate (no3-). nitrates are an essential nutrient for plants and are less harmful to aquatic life compared to ammonia and nitrite. this conversion is vital for maintaining the balance of nitrogen in the environment, preventing the accumulation of harmful nitrogenous compounds.

together, nitrosomonas and nitrospira facilitate the transformation of nitrogen from its toxic ammonia form into nitrates, which can be utilized by plants to grow. this process not only supports plant life but also helps in maintaining the ecological balance by detoxifying environments that receive high loads of nitrogen from natural and anthropogenic sources. hence, understanding the roles of these bacteria is crucial for environmental management and conservation efforts, particularly in areas impacted by excessive nitrogen pollution.