Yes. Go to your event editor, then to "Calls to Action". From "CTA Type" select "Live Poll".
You have to set the time for the poll question to appear (for live events you can manually trigger that from "Live Console"). Then add your questions and answers. You can select where the poll should appear, i.e beneath video/on video/top side right/bottom side right.
You can change color for button, poll question, answers and background as well. Once you are done, you can preview how it will look like during the webinar.
If you want to show poll results as well, you can do that too. You can also decide when the results should appear. Don't forget to hit save!