When is the lac operon most active?

As an asteroid comes close to earth, it's name will change to? apex

Match each description of an object’s motion with the position-time graph that represents it. not moving moving with constant speed speeding up slowing down

Ruby is conducting an investigation. an advantage of her design is that she can use a large range of variables, with that she can not be sure that one variable is the cause of another. what kind of investigation is ruby most likely conducting?