This week, I learned all about the structures of viruses and bacteria. We figured out that bacteria were alive. We think so because they have something called the cell wall, which is like a skeleton, and holds the insides of the bacteria in shape, or something like that. A bacteria also has something called a cell membrane which keeps everything in place. It also controls what goes in and what goes out. A bacteria has parts of it which are composed of cells, and a living thing must have the trait of being composed of cells. The bacteria has something called DNA which is something like heredity, and heredity is another trait of a living thing. A virus does not have DNA. Instead, it has something called RNA, which could also be called nucleoprotein. Another thing is that they have NOTHING made up of cells. A virus has a lipid envelope, or fat or oil covering. This blocks all the water from coming in. I learned a lot about viruses and bacterias this week.