Plant and animal cellsI. Introduction All living organisms are composed of at least one or more cells. Cells are the fundamental units of life. There are three main characteristics of a cell. First, all organisms are made up of one or more cells. Secondly, cells are the smallest units of life, and thirdly, cells arise only from pre-existing cells. These three facts are called cell theory. All cells can be classified into two basic cell types: prokaryotic and eukaryotic. To distinguish the location of cells in the two categories, you first need to look at what's inside the cell. Every cell, whether prokaryotic or eukaryotic, contains basic cell parts. They are: a plasma membrane, cytoplasm, DNA (the genetic material), and ribosomes. Prokaryotic cells have a simple structure and are usually smaller than eukaryotic cells. Furthermore, most prokaryotic cells contain a cell wall. In addition to having the basic cellular parts, eukaryotic cells also contain a membrane-bound nucleus and cell organelles. The membrane surrounding the nucleus in eukaryotic cells separates the nucleus from the cytoplasm. Most of the cells we used in the experiments we conducted were multicellular or made up of more than one cell. Different cells were used to complete the experiments. We used union cells, cheek cells, potato cells and Elodeo cells. We also used Planaria which is a unicellular organism. Many dyes and dyes were used in the experiments. They were water, methylene blue, salts and iodine. In our cell studies, we conducted three experiments to test different cell characteristics. The first two experiments were about how membranes were selectively permeable, diffusion, and andosmosis. To test this, we set up two experiments. The first experiment we did involved three cups. A slice of potato and a different liquid were placed in each cup. Distilled water was filled into the first cup. The second cup was filled with salt water and the third remained empty. We left these cups there for twenty-four hours and then observed them. The second experiment we set up involved a dialysis tube that acted like a membrane. In the dialysis tube we inserted a liquid composed of starches and sugars. We then placed the dialysis tubing in a glass of water with a paper solution......we sucked some of the water into the cells. When we looked at the cheek cells we discovered that they were very different from plant cells. The nucleus was in the center of the cheek cells, and there were some cell organelles. The Planarian cell was all red and had lines running through it. In this cell, however, the nucleus was not present. Plant and animal cells were very different. In plant cells there was movement of cell parts, but in animal cells there was no movement. Furthermore, the nucleus and chloroplast of the plant cell faced the outside of the cell because the chloroplast can receive sunlight better outside the cell than inside. In animal cells, however, the nucleus and cell organelles were located towards the center of the cell.III. Conclusions All living organisms are made up of at least one or more cells. Cells are the fundamental units of life. Without cells life cannot exist. In our experiments we went to see how cells work and what their characteristics are. By finding this information, I know I have a better understanding of how the.