Ascientist formed a theory based on an experiment he conducted. many years later, researchers studied his experiment to see if there were any possible sources of error. should the researchers do this?

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Glycogen is an energy-storage molecule in humans. a hormone that is called insulin controls the storage of glycogen in the liver. insulin is made up of amino acids.