This document provides information about cells, including: - All cells must have a cell membrane, cytoplasm, and DNA according to the cell theory. - Prokaryotic cells like bacteria and archaea lack membrane-bound organelles and nuclei, while eukaryotic cells have these structures. - Bacteria are the most common prokaryotes and can be spherical, rod-shaped, or spiral; archaea differ from bacteria in their ribosomes and cell structures.

1. 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

2. All Cells Must Have……. Cell membranes Cytoplasm DNA

3. Prokaryotic Cells Prokaryotes Do not have membrane bound organelles Do not have a Nucleus Classified into two major groups Bacteria Archaea

4. 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!!!)

5. Shapes of Bacteria Bacteria Have Three Shapes Sphere Rod Spiral Spherical Rods Spiral

6. 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

7. 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

8. Prokaryotic Vs. Eukaryotic Cell

9. 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.)