Question

You have inoculated a Clostridium species into a tube of media. After incubation, you observe that there is no growth, and you remember that Clostridium is an obligate anaerobe. What is the best explanation for the observed lack of growth?

Answer 1

presence of oxygen

Step-by-step explanation:

An obligate anaerobe organism is one that can only survive in an environment that is devoid of oxygen. If such organism is cultured in the presence of oxygen, it will refuse to grow.

The Clostridium must have been incubated in an oxygen-rich environment. Hence, its refusal to grow.