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Capnophiles Grow Best in

Question 21

Multiple Choice
Capnophiles grow best in

Capnophiles grow best in


A) ambient air, which contains 21% oxygen (O₂) and a small amount (0.03%) of carbon dioxide.
B) increased concentrations of CO₂ (5% to 10%) and approximately 15% O₂.
C) Five percent to 10% hydrogen (H₂) , 5% to 10% CO₂, 80% to 90% nitrogen (N₂) , and 0% O₂.
D) Reduced O₂ (5% to 10%) and increased CO₂ (8% to 10%) .

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