If both the oysters and barnacles will grow on a single rock and compete for space, then the relationship between them would be harmful as none of them would benefit the other but would only try to outcompete the other due to the limited availability of space.
<em>Hence, the relationship that the two would share would be harmful to both the organisms. </em>
Prokaryotes are living organisms with one cell (unicellular) with no nuclear envelope, and cell organelles lacking membranes. Examples of Prokaryotes include bacteria and cyanobacteria
