A culture medium consisting of agar, peptone, and beef heart is a "complex medium".
A culture medium is a specific in nature which is popularly applied in microbiological laboratories to cultivate various types of micro-organisms. A formation or a culture medium consists of various nutrients which are necessary for microbial growth and characteristics. The solid culture media consists of a brown jelly-like substance called as agar.
The full spectrum of growth factors that a species may require is included in complicated media generally to use more efficiently to grow unknown bacteria or bacteria that have specific nutritional requirements means species that require a lot of growth factors either known or unknown in nature.