Detailed Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: In the body, a reaction that uses the enzyme arginase produces both ornithine and this product in a process that has a citrulline intermediate. Birds and reptile produce a similar acidified form of this compound which is excreted as a white mass. Sometimes known as carbamide, it contains two amino groups bonded to a central carbonyl group and was produced by Friedrich Wohler (VUH-ler) in a reaction that showed that organic compounds could be produced from simple starting ingredients. For 10 points, name this compound found in mammalian urine.
A:
Science