Every living organism on Earth is composed of one or more cells. Cells contain smaller parts called organelles that must work together in order for the cell to live and reproduce. Simple cells are found in organisms such as bacteria, and more complex cells are found in plants and animals. The cells of animals and plants contain similar cell parts; however, plants cells have additional parts that make them unique. Both plant and animal cells take in and convert energy from their environment to support cellular function.
Choose one type of plant and one type of animal that interests you. Write down the name and a description of the physical characteristics that describe each organism. You can also include a drawing of each organism. Use the information in this chapter to describe how they are similar and different when you look at them on a cellular level.