Final answer:
Prokaryotes rely on their plasma membranes to acquire necessary materials and eliminate wastes. This membrane regulates the movement of substances into and out of the cell.
Step-by-step explanation:
Prokaryotes depend on their plasma membranes to obtain some materials and to get rid of wastes. Prokaryotic cells are surrounded by a plasma membrane that is crucial for controlling what enters and leaves the cell, and it also acts as a site for metabolic reactions to take place, such as cellular respiration and photosynthesis. The plasma membrane's selective permeability allows prokaryotes to absorb nutrients and expel waste, thereby maintaining proper cellular function.