What type of bacteria is shaped like two spheres?

The type of bacteria that is shaped like two spheres is known as diplococci. Diplococci are a specific arrangement of cocci, which are spherical bacteria. When these bacteria divide, they do so in planes and remain attached to one another, resulting in pairs. This characteristic grouping is what distinguishes them from other forms of cocci which may exist as single spheres or in chains, clusters, or other formations.

Bacilli, on the other hand, are rod-shaped bacteria, and spirilla are spiral-shaped. Both do not correspond to the description of being shaped like two spheres. Cocci is a broader term that includes any spherical bacteria, which can be single or clustered in various formations, but it does not specifically refer to the paired arrangement of spheres that defines diplococci. Therefore, diplococci are the clear and accurate answer for bacteria shaped like two spheres.