Tom and jesse decided to perform an experiment to see what exercise does to blood pressure. they decided to test their friend john. below is their procedure.1. take test subject's resting blood pressure.2. have test subject do either sit ups, push ups, or sprint for one minute.3. take test subject's blood pressure. tom and jesse run the same tests on john every day for one week. running the same test, for one week, is an example ofa) validity. b) a control. c) repetition. d) replication.

The correct answer is option C, that is, repetition.  

Repetition takes place when various sets of measurements are performed at the time of one scientific investigation. While replication takes place when a scientific investigation is reproduced by another individual. Repetition refers to multiple trials, while replication is when one redo the whole experiment. In repetition, the experiment is repeated at least three times.  

explanation:

yes you are doing it right great gob

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure