Which type of bacteria clusters resemble grapes?

The correct answer identifies Staphylococci as the type of bacteria that clusters resemble grapes. This term is derived from the Greek word "staphyle," meaning a bunch of grapes, due to the characteristic arrangement of these bacteria. Staphylococci are cocci-shaped bacteria that tend to form irregular clusters, similar to how grapes grow in bunches.

In contrast, streptococci, which are also cocci-shaped, typically align in chains rather than clusters, leading to a different formation that does not resemble grapes. Bacilli refer to rod-shaped bacteria, which naturally do not cluster in a manner resembling grapes, while spirilla are spiral-shaped bacteria that have a distinct corkscrew appearance. None of these shapes or arrangements match the grape-like clustering that defines Staphylococci.