Acrasiomycetes -

: Because they never fuse their cell membranes, they are often used by scientists to study how single-celled life evolved the ability to cooperate and build multicellular organisms.

The confusion likely stems from comparing them to a different group of slime molds. 🔬 Acrasiomycetes vs. Myxomycetes acrasiomycetes

The class does not form a "solid piece" or a single fused mass at any point in its life cycle. Instead, these organisms are defined as cellular slime molds , meaning they maintain their individual cell membranes at all times. : Because they never fuse their cell membranes,