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Lecture Notes for BIOL 346 - Evolution with Salgado at Christian Brothers University (CBU)

Notes Information

Material Type:Class Note
Professor:Salgado
Class:BIOL 346 - Evolution
Subject:Biology
University:Christian Brothers University
Term:--
Keywords:
  • Ambulocetus
  • Archaeopteryx
  • Particularly
  • Archean Time
  • Similarities
  • Disconnected
  • Differences
  • Behind (of)
  • Terrestrial
  • Traditional
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Sample Document Text

Chapter 4 EVOLUTION IN THE FOSSIL RECORD The fossil record reveals the existence of many creatures that have left no living descendants; of great episodes of extinction and diversification; and of the movements of continents and organisms the explain their present distributions. The fossil record provides evidence on two particularly important themes: • • Phenotypic transformations in particular lineages. Changes in biological diversity over time. SOME GEOLOGICAL FUNDAMENTALS ROCK FORMATION EARTH STRUCTURE Radius of 6,357 km (3,948 miles) at the poles and 6,378 km (3,960 miles) at the equator. Asthenosphere: • • • Inner core 800 miles radius, solid iron. Outer core1,300 miles radius, molten iron. Mantle 1,800 miles radius, molten rock. Lithosphere: • • Upper part of the mantle. Crust 5-35 miles thick, solid rock. ROCK TYPES Igneous: solidified magma; about 65% of the crust, e.g. granite, lava flows, basalt. Sedimentary: hardened eroded material due to pressure or chemical means; about 8% of...

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