Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Review Session # 3 *The Characteristics of Cells
Document related concepts
Transcript
Review Session # 3 “The Characteristics of Cells” True of false: All living organisms are made up of one or more cells. True of false: All living organisms are made up of one or more cells. True True or false: Rocks are made up of cells. True or false: Rocks are made up of cells. False. Since rocks have never been alive (because they have never performed any life functions), they have never had any cells. True or false All cells are the same size. True or false All cells are the same size. False. Particularly in eukaryotic or multicellular organisms, cells are specialized and therefore have different jobs to do so they are therefore not alike. True or false Cells perform life functions for living organisms. True or false Cells perform life functons for living organisms True • List two ways that all cells are alike. • List two ways that all cells are alike. • A. Both contain DNA B. Both have cytoplasm C. Both have ribosomes • D. Both have cell walls • Even though I’ve listed four, you only need to remember two. Calculate the surface area-to-volume ratio of a cube whose sides are c cm long. Calculate the surface area-to-volume ratio of a cube whose sides are c cm long. 54 cm2 : 27 cm3 or when reduced down 2 cm2 : 1 cm3 DON’T FORGE TO PROPERLY LABEL EACH NUMBER! What is the cell theory? What is the cell theory? All organisms are made up of one or more cells. The cell is the basic unit of all living organisms All cells come from existing cells • Who was Anton van Leewenboek? • Who was Anton van Leewenboek? • Was the first person to describe living cells. How do prokaryotes differ from eukaryotes? How do prokaryotes differ from eukaryotes? Eukaryotes DNA is found in the nucleus, while prokaryotes DNA is in the cytoplasm. Eukaryotes have membranes around all organelles and prokaryotes do not. How are prokaryotes and eukaryotes alike? How are prokaryotes and eukaryotes alike? The cells of both prokaryotes and eukaryotes contain DNA, a cell membrane, and cytoplasm. Who was Rudolf Virchow? Who was Rudolf Virchow? Developed the theory that cells come from existing cells. Who was Matthias Schwann? Who was Matthias Schwann? Proved the idea that plants are made of cells. Could a single-celled organism become large enough to eat all of Adel? • Could a single-celled organism become large enough to eat all of Adel? • No. A single-celled organism couldn’t become large enough to eat Adel. It would not be able to have a large enough surface-to-volume ratio. It therefore would not have enough surface area to exchange it nutrients and waste products. • Who was Anton van Leewenboek? • Who was Anton van Leewenboek? • Was the first person to describe living cells. Of what importance did Theodor Schwann play in the development of the cell theory? Of what importance did Theodor Schwann play in the development of the cell theory? Proved that cells are the basic unit of all organisms. A. How is the structure of a unicellular organism different than the structure of a multicellular organism? B. How does this affect each of their respective function? A. How is the structure of a unicellular organism different than the structure of a multicellular organism? B. How does this affect each of their respective function? A. A unicellular organism is made up of one cell. This cell must perform all of the life functions for the organism. B. A multicellular organism is made up of many cells, allowing these organisms to have specialized functions.
