What feature is unique to Yersinia pestis when compared to other Yersinia species?

A - Motile

B - Capsule

C - Spore forming

D - Can grow in the presence of oxygen

B-Capsule

Explanation:

Bacteria from Yersinia genus don't develop capsules, but Yersinia pestis has the exception. Y. pestis develops a similar structure to a capsule.

Other options are true for Y. pestis and all Yersina genus. Despite the fact that someones can lose their motility in a stage of their life cycle, these bacteria are motile. Also, they are facultative anaerobic organisms and they don't form spores.