How might simulating a large bacterial population on a computer help us see what is happening at time scales or size more easily than we could see in our Petri dishes?

The picture below shows two galaxies. spiral galaxy and elliptical galaxy which of these statements best describes a similarity between the two galaxies? (2 points) both have elongated centers. both have centers shaped like bars. both change their shape from time to time. both are held together by gravitational forces.