Why is citric acid added to food? to add color to add tartness to add bitterness to add sweetness its b. i'm only putting this out there because all the ones that are already on this website are wrong and archived.

Embryos of different species look very similar, which shows that the organisms share a ancestor.

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

Is it safe to take 450mg of diphenhydramine hydrochloride?