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Mind Stretcher 1. How many Cells does an Egg have? ONE 4. Who was the first person to describe cells? Robert Hooke 5. What are the parts to the cell theory? 1. All organisms are made of one or more cells. 2. The cell is the basic unit of all living things. 3. All cells come from existing cells. All Cells Must Have……. • Cell membranes • Cytoplasm • DNA Prokaryotic Cells • Prokaryotes – Do not have membrane bound organelles – Do not have a Nucleus – Classified into two major groups • Bacteria • Archaea Bacteria • • • • Most Common Prokaryotes Smallest of all cells Can live almost everywhere DNA is long and circular – Shaped like a twisted rubber band • Not all Bacteria are bad!! – We have bacteria on our teeth, skin, and in our digestive systems! (They help us!!!) Shapes of Bacteria • Bacteria Have Three Shapes – Sphere – Rod – Spiral Spherical Rods Spiral Archaea • Different from bacteria because they have eukaryotic type ribosomes • Different cell wall and cell membrane from all other cells • Live in extreme environments – Extremophiles • Heat-Loving • Salt-Loving – Methane-making • Can live near volcanic vents Eukaryotic Cells • Have membrane bound organelles and a nucleus • Largest of all cells – 10 times larger than bacteria cells • ALL other living things (that are not bacteria or archaea) are made of eukaryotic cells! • Can be unicellular (made of 1 cell) or multicellular (made of many cells Prokaryotic Vs. Eukaryotic Cell Super Slueth Find someone who can name the 3 things all cells have. Find someone who can tell you the 2 major groups of prokaryotic cells. Find someone who knows the most common type of prokaryote. Find someone who knows the smallest type of cell. Find someone who Find someone who knows the 3 shapes knows how Archea of bacteria. differ from other bacteria. Find someone who knows what eukaryotic cells have that prokaryotes do not. Find someone who knows the largest type of cells. Find someone who when called on can summarize this lesson. (Only need their name here.)