Micrococcus luteus is known for its tetrad arrangement. This means that the bacteria divide in two planes, resulting in groups of four cells adhering to each other.

While a tetrad arrangement is the most common, it's worth noting that Micrococcus luteus can also exhibit other arrangements under certain conditions, including:

* Pairs: Two cells together.

* Irregular clusters: Larger groups of cells that are not organized in a specific pattern.

The specific arrangement can be influenced by factors such as the growth medium and the age of the culture.