Anew and effective antibiotic becomes widely used for a particular species of bacteria. after some time, an antibiotic-resistant strain of the bacteria becomes prevalent. which mechanism explains this phenomenon?

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

Which statement is true regarding the diagram of circle p? the sum of y and z must be 2x. the sum of y and z must be x. the difference of z and y must be 2x. the difference of z and y must be x

What is the difference between a substance "getting wet" and "being dissolved" in a liquid at the particulate level?