Timeline of Major Evolutionary Milestones in Earth's History, Quizzes of Biology

Download Timeline of Major Evolutionary Milestones in Earth's History and more Quizzes Biology in PDF only on Docsity! TERM 1 Triploblastic DEFINITION 1 Triploblasty is a condition of the blastula in which there are three primary germ layers: the ectoderm, mesoderm, and endoderm. TERM 2 7 Phylums DEFINITION 2 Chordata Mollusca Porifera Cnidarian Annelida Arthropoda Echinodermata TERM 3 First shelled organisms DEFINITION 3 543 mya Paleozoic era Cambrian period TERM 4 First Chordates DEFINITION 4 Paleozoic era Cambiran period TERM 5 First bryozoans DEFINITION 5 Paleozoic era Ordovician period TERM 6 First vertebrates (jawless fish) DEFINITION 6 Paleozoic era Ordovician period TERM 7 First Zygomycete fungi DEFINITION 7 Paleozoic era Ordovician period TERM 8 First land plants DEFINITION 8 Paleozoic era Ordovician period TERM 9 First fish with jaws DEFINITION 9 Paleozoic era Silurian period TERM 10 First bony fish DEFINITION 10 Paleozoic era Silurian period TERM 21 Super continents Laurendia N and Gondwana S DEFINITION 21 Paleozoic era Devonian period TERM 22 Super continent Pangea DEFINITION 22 Paleozoic era Permian period TERM 23 Burgess Shale & Chengjiang Faunas DEFINITION 23 larger more complex animals in Cambiran period TERM 24 Why a dramatic change in Cambrian? DEFINITION 24 hypothesis: increase in oxygen TERM 25 Tiktaalik roseae DEFINITION 25 link from water to land animals, 370 mya, had gills scales wrist joints and lungs TERM 26 First dinosaurs DEFINITION 26 Mesozoic era Triassic period TERM 27 First mammals DEFINITION 27 Mesozoic era Jurassic period TERM 28 First Bird DEFINITION 28 Mesozoic era Jurassic period TERM 29 First placental mammals DEFINITION 29 Mesozoic era Cretaceous period TERM 30 First flowering plants DEFINITION 30 Mesozoic era Cretaceous period TERM 31 Pangea intact DEFINITION 31 Mesozoic era Triassic period TERM 32 Pangea begins to break apart DEFINITION 32 Mesozoic era Jurassic period TERM 33 First horses DEFINITION 33 Cenozoic era Paleocene period TERM 34 First apes DEFINITION 34 Cenozoic era OIigocene period TERM 35 Phyletic gradualism (Darwin) DEFINITION 35 all change is constant and gradual, rate of speciation slow