Question

A nutrient medium that contains at least one ingredient that is NOT chemically definable would be termed?

1) Undefined medium
2) Complex medium
3) Synthetic medium
4) Selective medium

Answer 1

2) Complex medium.
A nutrient medium that contains at least one ingredient that is not chemically definable is called a complex medium. Complex media are made from natural substances such as extracts from plants, animals, or microorganisms, and their exact composition is not known. Examples of complex media include nutrient broth and
tryptic soy agar