Why are footprints easier to cast than tire tracks?

What is the relation between concentration of reactants and the rate of chemical reaction?

Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean