1. Cell Organization Chapter 1 Section 3

2. Cell Organization  All organisms can be classified by their cell type.  Archaea and Bacteria  Most unicellular organisms are classified here  Prokaryote (no nucleus, ribosomes in cytoplasm but not other organelles, tough cell wall)  Eukarya  Plant cells and animal cells are two main types  Eukaryotes (have a nucleus, many specilized organelles, complex in structrue)

3. Cell Organization  Cells in multicellular organisms are specialized  Specialization : of cells means that specific cells perform specific functions.  This is why a single cell from a multicellular organism can not survive on its own

4. Cell Organization  A multicellular organism is community of cells working together.  The amount of specilized cells depends on the complexity of the organism.  Groups of specilized cells are called tissues  Groups of tissues are called organs  Groups of organs are called organ systems