Question

fill in the blank question
a complex nutrient medium supplemented with blood, serum, or some growth factor to provide the nutrition of fastidious microorganisms is called an ​medium.

Explanation:

In microbiology (a subfield of Biology, which is part of Natural Science), a complex nutrient medium supplemented with blood, serum, or some growth factor to support the growth of fastidious microorganisms is known as an enriched medium. Fastidious organisms have complex nutritional requirements, and enriched media provide the necessary additional nutrients (like those from blood/serum or growth factors) to allow their growth.

Answer:

enriched