Which type of bacteria appears in grape-like clusters?

The type of bacteria that appears in grape-like clusters is staphylococci. This characteristic arrangement results from the way the staphylococcal cells divide. Unlike other bacterial forms, staphylococci undergo multiple rounds of division in multiple planes, leading to their clustering appearance, which resembles a bunch of grapes.

In contrast, streptococci appear in chains, as they divide along a single plane. Bacilli, on the other hand, are rod-shaped bacteria that typically appear in single or chains of rods. Spirilla are spiral-shaped bacteria that exhibit a twisted form and do not cluster like staphylococci. Therefore, the distinct grouping of staphylococci in grape-like structures is what sets them apart and makes them the correct answer in this context.