Control groups are useful in scientific experiments because they (1 point) Are easily identified by the experimenter during the investigation.
Are cheap and relatively easy to maintain throughout the experiment.
Prevent the data collection from being contaminated by other variables.
Provide a standard for comparison with the data collected in the investigation,

a) are muscles that have bands.

happy to

pls mark as brainliest

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

hèllo, sorry i really need some more points so if you need this qustion answered than retype it

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers