What element is used to disinfect swimming pools?

Which of the following is an oxidation-reduction reaction? (pictured below)

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

What are the result of when individual components in an organism interact with others to create noval stucture and function called