Answer:
Pioneers
Step-by-step explanation:
This question is related to primary succession, which is the first time colonization of a bare rock by certain organisms called PIONEER SPECIES. In this type of succession, a rock surface where there is absence of soil or vegetation is colonized by these set of organisms known as PIONEER.
These pioneer species greatly aid in the formation of soil in that area in order for other form of lives to inhabit the area. Examples of pioneer species that are adapted to grow on these bare or Rocky surfaces are LICHEN, GRASSES etc.