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Evolutionary Events Challenge: Place these events in their proper order Last dinosaurs Chrictonsaurus Ankylosaurus First mammals Megazostrodon? First dinosaurs Eoraptor Cretaceous-Tertiary extinction event Photosynthetic bacteria Chromatium okenii Bacteria and Archaea split Helicobacter pylori (bacteria) Halobacterium halobium (archaea) First Homo Homo habilis Seed ferns Simple animals Caenorhabitis elegans First flowering plants Magnolia sp. Earliest primates Ring-tailed lemur--representative of an early primate lineage Jawless fish Lampetra fluviatilis First multicellular organisms Microthamnion sp.-- a simple alga Permian-Triassic extinction event eliminates 98% of marine species Simple land plants Fossils of Cooksonia (found in Ireland) Insects, Coal age Simple cells emerge Hot springs containing Archaea First arthropods Opabinia First bird Archaeopterix Accumulation of oxygen, ozone Cliffs of oxidized iron: Fe3+ Early amphibians Tyrannosaurus rex appears Primitive eukaryotes First sexual reproduction