Question

question 17 2 pts ______ bacterial cells use oxygen in their metabolism.
○ aerobic
○ anaerobic
○ facultative

Explanation:

To solve this, we analyze the definitions:

• Aerobic bacteria require oxygen for metabolism.
• Anaerobic bacteria do not use oxygen (and may be harmed by it).
• Facultative bacteria can switch between using oxygen and not, but the question is about those that use oxygen in their metabolism, so "aerobic" is the best fit as it specifically denotes using oxygen.

Answer:

A. aerobic