Answer:
the branch of science concerned with classification, especially of organisms; systematics.
Explanation:
The correct answer is p53 gene.
This is one of the most important genes in our bodies, which is evident by its nickname of the "guardian angel of the genome." It is called that way because it protects our cells from becoming cancerous. It also activates many other genes.
Correct answer - Frequency.
Why? - The frequency, is the number of waves that pass a certain point in a specified amount of time.