What formation results from tetrads (tetracocci) after cell division?

The correct answer is that tetrads result in squares of cocci. Tetrads specifically refer to a structure in which four spherical bacteria (cocci) remain linked together after division. This occurs when bacterial cells divide in two planes, which is characteristic of certain species of cocci. As these cells divide and remain connected, they form the distinctive square-like arrangement of four cells. This unique arrangement is key to identifying and classifying certain types of bacteria in microbiology. In the case of tetracocci, understanding this formation is important for recognizing their characteristics and behavior in various environments.