Mindstretcher 1. How many Cells does an Egg have?? ONE 2. ___________________ limits the size of a cell. Surface area-to-volume ratio 3. Leeuwenhoek viewed pond scum and called the organisms he saw _______________. Animalicules 4. Who was the first person to describe cells?? Robert Hooke 5. How Many parts are there to the Cell Theory (be prepared to describe each one! ) Three

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 of Ribosomes –Archaea ribosomes are like those of eukaryotic cells Have 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 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! Most Eukaryotic organisms are 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 knows the 3 shapes of bacteria. Find someone who knows how Archea 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.)