"History Life on Earth"
HISTORY OF LIFE ON EARTH AND CLASSIFICATION OF ORGANISMS QuickTime™ and a decompressor are need ed to see this picture. Biological Changes (BIO EVOLUTION) Universe Origin of Origin of Biodiversity the Life on 10 bya Earth/ Earth and a On QuickTime™ decompressor Solar are need ed to see this picture. Earth 3.5 Bya System 4.6 Bya 1,000,000,000 years = 1 B.Y. Bya = Billion years ago 3.5 Billion Years Ago Bitter Springs Chert (in Red) Oldest known life Prokaryotic cell No nucleus Resembles Cyanobacteria from today http://www.ucmp.berkeley.edu/precambrian/bittersprings.html Ancient Fossil Bacteria : Pictured above are two kinds cyanobacteria from the Bitter Springs Chert. On the left is a colonial chroococcalean form, probably Myxococcoides minor, and on the right is the filamentous Palaeolyngbya. 1 BYA-1.8 BYA First Eukaryotic Cells 1 BYA Fossils with preserved nuclei http://www.ucmp.berkeley.edu/alllife/eukaryotafr.html 600-560 MYA Formation of the Ozone Layer Cyanobacteria now producing much of the world’s Oxygen (O2). UV rays hit oxygen and cause formation of Ozone (O3). Now that Ozone is blocking UV rays…Life can move onto land http://www.albany.edu/faculty/rgk/atm101/ozone.htm#form 3.5 Bya 1 Bya Today 560 MYA Ozone Layer Forms 1,000,000,000 years = 1 B.Y. When did Humans come along? Homo sapien sapiens (modern man) first appears ~1.8 MYA (MILLION not Billion) QuickTime™ and a decompressor are neede d to see this picture. 3.5 Bya 1 Bya Today 560 MYA 1.8 MYA Ozone Layer Forms Homo sapien 1,000,000,000 years = 1 B.Y. Classification All living and extinct organisms are organized into units called TAXONS 6 Kingdom Classification: Bacteria Archaea Protists Plants Fungi Animals (Invertebrates and Vertebrates) Classification — (Linneaus System) Kingdom Phylum Class Order Family Taxonomic Genus unit/ Taxon Species Bacteria and Archaea Are unicellular prokaryotes (no nucleus) Primitive (simple) Archaea live in extreme conditions (ex: in lava flows, ice) Archaea in deep sea QuickTime™ and a vent! decompressor are neede d to see this picture. Protists Are unicellular or multicellular eukaryotes (with nucleus) Includes amoeba, algae (kelp) Volvox Amoeba QuickTime™ and a QuickTime™ and a decompressor decompressor are neede d to see this picture. are need ed to see this picture. Plants Are multicellular Eukaryotes (with nucleus) Can Photosythesize (autotrophs) QuickTime™ and a decompressor are needed to see this picture. Amoeba Fungi Are multicellular eukaryotes (with nucleus) Absorb nutrients from the surrounding (heterotroph) QuickTime™ an d a decompressor are need ed to see this p icture . Animals Eukaryotes and heterotrophs Invertebrates have no backbone Vertebrates have backbone a d na ™emi Tkciu Q ros serpmoced . eru tci p sih t ee s o t de deen e ra Animals Invertebrates - can be motile (move) or sessile (stationary); Body symmetry can be present/absent; if present, body can show radial symmetry or bilateral symmetry; Body can be divided into segments of same type or different types QuickTime™ and a decompressor are neede d to se e this picture. Animals Vertebrates - includes fishes, amphibians, reptiles (includes birds), and mammals (have mammary or milk glands) QuickTime™ and a decompressor are neede d to see this picture. QuickTime™ and a decompressor are neede d to see this picture.