Final answer:
The prefix epi- means above, upon. It is commonly used in biology to describe structures or processes that are located on or above a specific part of the body.
Step-by-step explanation:
The prefix epi- means above, upon. It is commonly used in biology to describe structures or processes that are located on or above a specific part of the body. For example, epidermis refers to the outermost layer of the skin, which is located above the dermis. Another example is epiphyseal plate, which is found at the ends of long bones and is responsible for bone growth.