Microbes fulfilling their carbon needs via atmospheric CO2 and energy needs through simple inorganic chemical oxidation are termed_________?
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Answer: A. Chemoautotroph
Explanation
Microbes require carbon and energy sources to sustain their metabolic life processes. Chemoautotrophs use atmospheric carbon dioxide for carbon and inorganic oxidation for energy. This specialized nutritional classification distinguishes these organisms from photosynthetic microbes. Autotrophic organisms synthesize complex organic molecules from simple inorganic raw materials. Chemoautotrophic bacteria oxidize compounds like ammonia, sulfur, or iron to generate energy. These microbes play crucial roles in global biogeochemical nutrient cycling pathways.
Nitrifying bacteria in agricultural soils act as chemoautotrophs oxidizing ammonium to nitrate. Understanding microbial metabolism helps scientists manage soil fertility and bioremediation projects. Chemoautotrophic organisms support life in extreme environments devoid of sunlight. Option B describes photoautotrophs, which obtain energy from sunlight instead of chemicals. Option C refers to saprophytes, which feed on dead organic matter for carbon and energy. Option D is incorrect because chemoautotroph accurately identifies this metabolic group.
- Subject
- Agriculture
- Category
- Agriculture
- Topic
- —
- Difficulty
- medium
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