Fryshta is using the Help window in PowerPoint to learn about inserting Smart Shapes into a presentation. She currently has a Help page open that shows all of the steps she needs to take.

Which button on the Help window would be most useful for keeping the window open and visible while Fryshta completes the steps?

Which best describes the role or restriction enzymes in the analysis of edna a. to break dna into fragments that vary in size so they can be sorted and analyzed b. to amplify small amounts of dna and generate large amounts of dna for analysis c. to purify samples of dna obtained from the environment so they can be analyzed d. to sort different sizes of dna fragments into a banding pattern that can be analyzed