Transcript Cells
Cells So what is a cell? Cell The most basic unit of organization that can be considered as life. Original Cell Theory http://www.bio.miami.edu/~cmallery/150/unity/cell.text.htm Theodor Schwann and Matthias Schleiden , 1839 1) The cell is the unit of structure, physiology, and organization in living things. 2) The cell retains a dual existence as a distinct entity and a building block in the construction of organisms. 3) Cells form by free-cell formation, similar to the formation of crystals (spontaneous generation). Cell Theory Spontaneous Generation was part of the original cell theory Spontaneous Generation: http://www.chem.ox.ac.uk/vrchemistry/chapter26/page02.htm Modern Cell Theory 1. All known living things are made up of cells. 2. The cell is the structural & functional unit of all living things. 3. All cells come from pre-existing cells by division. (Spontaneous Generation does not occur). 4. Cells contain hereditary information which is passed from cell to cell during cell division. 5. All cells are basically the same in chemical composition. 6. All energy flow (metabolism & biochemistry) of life occurs within cells. 70 There are 2 fundamental types of cells There are 2 types of cells http://www.phschool.com/science/biology_place/biocoach/cells/common.html What are the two types of cells? Two Types of Cells 1. Prokaryotes 2. Eukaryotes Life on Mars http://www.actionbioscience.org/biodiversity/salyers2.html?print Life on Jupiter’s Moon Europa? What do you think? History of the Universe http://www.historyoftheuniverse.com/archaebact.html There are 2 types of cells http://www.biologymad.com/ http://www.cod.edu/people/faculty/fancher/ProkEuk.htm http://www.phschool.com/science/biology_place/biocoach/cells/common.html http://www.slic2.wsu.edu:82/hurlbert/micro101/pages/Chap2.html#Eukaryotic http://www.cod.edu/people/faculty/fancher/CellStructure.htm Cells Alive: http://www.cellsalive.com/cells/cell_model.htm Prokaryotic Eukaryotic Page 195 Page 195 Cell that lacks internal structures surrounded by membranes. Organisms that have cells containing internal, membrane-bound structures. Usually single-celled organisms. Organelle: Each has its own membrane. Nucleoli rather than nucleus Kingdom Archaebacteria Kingdom Monera (Eubacteria) Kingdoms Protista, Plantae, Fungae, Animalia. Appeared 3.5 billion years ago Evolved 1.5 billion years ago Kingdoms and Cell Type http://www.ric.edu/faculty/ptiskus/six_kingdoms/index.htm http://www.britannica.com/EBchecked/topic/32547/archaea http://faculty.ccbcmd.edu/courses/bio141/lecguide/unit1/3domain/3domain.html Prokaryote – Eubacteria / Monera Protista – The Protozoans Euglena Amoeba Paramecium Also Unicellular Archaebacteria: Found in extreme environments Plant Cell / Eukaryote Animal Cell / Eukaryote Cell Parts http://www.biology.arizona.edu/CELL_BIO/tutorials/pev/page3.html www.cellsalive.com http://www.johnkyrk.com/CellIndex.html Plant Cell Coloring Sheet http://www.biologycorner.com/worksheets/cell_color_plant.html Animal Cell Coloring Sheet http://www.biologyjunction.com/biology_coloring_worksheets.htm Human Cell http://www.crayola.com/free-coloring-pages/print/human-cell-coloring-page/ Cell Function Animation Cell Cycle and Mitosis Animation Animation http://www.biology.arizona.edu/CELL_BIO/tutorials/cell_cycle/cells1.html Cell Division Interactive: http://www.biologyinmotion.com/ Genetics http://digilander.libero.it/avifauna/articoli_ornicoltura/PHTright7.html Cellular Reproduction http://silverfalls.k12.or.us/staff/read_shari/mysite/chapter_8_AB.htm http://essayweb.net/biology/celldivision.shtml http://www.biology.iupui.edu/biocourses/N100/2k4ch9meiosisnotes.html http://www.brown.edu/Courses/BI0032/gentherp/meioIB.html Meiosis http://www.macroevolution.net/meiosis-stages.html http://www.biology.arizona.edu/CELL_BIO/tutorials/meiosis/main.html Meiosis Animation Meiosis I Animation Meiosis II Animation Meiosis