What experiment? Id prob say popularity
Answer:
A hydration reaction is a chemical reaction where a hydrogen and hydroxyl ion is attached to a carbon in a carbon double bond.
The answer is C. species are the smallest taxonomic group. I also have taken this test before
The bacteria that caused diseases treated by penicillin became resistant to the drug. The overuse of penicillin easily narrowed the populations of disease-causing bacteria to the few strains that were resistant to penicillin, and these few strains grew to populate. Natural selection.