The Aerated Upper Layer of Soil Is Likely to Have

question 1

Multiple Choice

The aerated upper layer of soil is likely to have ________ concentrations of H₂ for aerobic H₂-oxidizing Bacteria, so these bacteria likely ________.

• A) high / thrive in such conditions by not competing with chemoorganotrophs
• B) high / generate important reducing equivalents as byproducts for other microorganisms in the soil
• C) low / do not occur in such habitats
• D) low / will need a chemoorganotrophic way to grow as well

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