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?

If you want to change the pitch of a sound, you have to change the question 7 options: volume speed amplitude frequency

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel

In science class richard learns that a substance has a boiling point of 230 fahrenheit his teacher ask him to convert this temperature to degrees celsius what is the boiling point of his substance in degrees celsius