Plants Animals Fungi Bacteria Protists 1 11/12/2012 Who Disco - PDF document

11/12/2012 What the Cell ??? ??? ??? ??? ??? ??? Set 2: Bell Ringer #3 List 5 things made of cells The Cell l Theory ry Cells are the basic units of life All living things are made up of cells. New cells are made from existing cells. This is theory applie ies to : bacteria ia, , multic ticellular ar organ anis isms, , unicellular ar organ anis isms, , plants ts, , animal imals – anyth thin ing living! What t th the Cell?! l?! Plants Animals Fungi Bacteria Protists 1

11/12/2012 Who Disco scove vere red d the Cell Theory? ory? 1665 – Robert Hooke • Looked at cork & named cells 1674 – Anton van Leeuwenhoek • Looked at living cells & improved microscope 1838 – Matthias Schleiden • Looked at plants & determined that plants were made of cells 1839 – Theodor Schwann • Looked at animals & determined that animals were made of cells 1855 – Rudolph Virchow • Stated that all cells come from other living cells How Did They y See e the Cell? l?  They used microscopes!  Micro means ________. SMALL  A microscope is a tool we use to see small objects. What t th the Cell?! l?! The ____ & _____ of a cell relate to its function. size shape I am a I am a I am a prison heart cell! skin cell! cell! Cell l Speci ciali liza zati tion – Divi visi sion on of Labor or 2

11/12/2012 What t th the Cell?! l?!  All cells have 4 things in common:  Surrounded by a barrier = Cell Membrane  Cytoplasm  Ribosomes  At some time, they contain DNA  Molecule that carries genetic info What t is an Organell anelle? e?  Internal structure  Enclosed in a membrane  Thin layer of cover or lining  Specific function (job)  “Little Organ” Organelles What t is a N Nucleu leus? s?  Large structure  Enclosed in a membrane  Thin layer of cover or lining  Contains the cell’s DNA  Controls many cell activities Nucleus 3

11/12/2012 Types s of Ce Cells ls Prokaryote Eukaryote Pro = No No nucleus . Nucleus that Genetic material contains genetic NOT contained in material a nucleus Generally larger & more complex. Generally smaller Have & simpler membrane-bound organelles. Plants, Animals, Bacteria Fungi, & Protists Types s of Ce Cells ls Venn n Diagr gram am of Cell l Types es • Cell membrane Eukaryotes • DNA Prokaryotes • Carry out a • Nucleus variety of • No nucleus • Larger activities • Smaller • Cytoplasm • Complex • Ribosomes • Simpler • Membrane-bound organelles 4