4) comparing algae and plants single celled algae multicelullar algae multicellular green plant all living things are made of one or more cells. how does the green plant in slide #3 differ from the single celled green algae in slide #1 and the multicellular green algae in slide #2? a) only the plant has chloroplast to make food. b) only the algae cells require water to stay alive. c) the green plant has cells that are able to reproduce. d) there are many types of cells within the green plant.