Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Question: Oxygenated blood is transported by what system? Answer: circulatory
Oxygenated blood is transported by the circulatory system from lungs to tissues throughout the body.

Question: When waves of two different frequencies interfere, what phenomenon occurs? Answer: beating
When waves of two different frequencies interfere, a phenomenon known as beating occurs. The frequency of a beat is the difference of the two frequencies.

Question: There are three different types of rna. all three types are needed to make what? Answer: proteins
There are three different types of RNA. All three types are needed to make proteins.