Thank you for the opportunity to help you with your question!
The incorrect statement is
Aerobic bacteria will undergo fermentation instead of cellular respiration when o2 is present
Aerobic bacteria use oxygen to undergo cellular respiration. Cellular respiration creates more ATP molecules for the bacteria which they use as their energy source. Fermentation happens when oxygen is not present.
Please let me know if you need any clarification. I'm always happy to answer your questions.