Pepperoni dominates as the most popular pizza topping. A whopping 36% of people order pepperoni on their pizzas, according to research by business advisor Brian Roemmele. Roemmele researched point-of-sale data from 604 pizza locations across the United States. Here's the chart of his findings, which was first posted to Quora: Brian Roemmele/Quora
Nutrient Agar is a complex medium because it contains ingredients with contain unknown amounts or types of nutrients. Nutrient Agar contains Beef Extract, Peptone and Agar in water. Beef extract is the commercially prepared dehydrated form of autolysed beef and is supplied in the form of a paste.
Blood agar is a bright red, opaque medium. The variety of complex nutrients found in blood supports the growth of most bacteria, fastidious and otherwise, that would be encountered by students. Such media are said to be complex (incapable of being chemically recreated) and enriched (containing an uncommonly rich array of nutrients).