If a person has a family history of substance abuse, does this mean that the person will also become a substance abuser? why?

Enzymes are proteins that speed up reactions by providing an additional energy source supplying additional molecules for the reaction removing inhibitors that slow down reactions lowering the amount of energy required

Modern whales developed their traits through natural selection what occurs during the process of natural selection

The united states produces an average of 429 billion pounds of food annually. about 133 billion pounds of that food ends up as waste.the percentage of food that the united states wastes each year is %.