Evolution Elaine
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Evolution Elaine



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Evolution Elaine Evolution Elaine Presentation Transcript

  • _elaine’s_ Reminders
    • Do not use the enter key you might not see some effects. Use the mouse if possible.
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    • Thank You
  • Contents
          • Definition of Evolution
          • Mechanisms of Evolution
          • Evidences of Evolution
    • – the change in a living population over time.
  • Modern Theory of Evolution Religion vs Science Early Concepts Lamarck's Concept
    • Special Creation Theory
    • vs
    • The Theory of Evolution
  • Special Creation Theory
    • All species were made by a supreme being during creation and that they have changed little since then .
  • Theory of Evolution
    • Evolutionists maintain that present-day species have developed from simpler, more primitive organisms that existed millions of years ago.
  • Early Concepts of Evolution
  • Aristotle The nature evolved gradually from the simple to the more complex and from the imperfect to the perfect
    • He wrote an evolutionary explanation of the origin of plants and animals.
  • Leonardo da Vinci
    The fossil found in the rocks resulted from a succession of fires and flood
  • James Hutton
    • sedimentary deposits was due to geological forces of erosion
  • Charles Lyell
  • Lamarck's Concept of Evolution
    • He believed that once organisms have become adapted to their environment, the traits that they have acquired are transmitted to the next generation.
  • Charles Darwin
    • Father of the Modern Theory of Evolution proposed that evolution is brought about by natural selection.
    • Natural selection is the process by which organisms with traits suited to an environment, or favorable traits, have a better chance of surviving and reproducing than those that are not suited.
  • It is the struggle for existence and the survival of the fittest
  • Evidences of Evolution Fossils DNA Coding Comparisons
    • (from Latin fossus , literally "having been dug up")
    • - are the preserved remains
    • that had lived in the past.
    • Three small ammonite fossils, each approximately 1.5 cm across.
    • Petrified wood . The internal structure of the tree and bark are maintained in the permineralization process.
    • Eocene fossil fish Priscacara liops from Green Riv e r Formation of Utah
  • DNA Coding
    • To determine whether the species have evolved from a common ancestor, it is logical to look for similarities among the species
  • Comparative anatomy is the study of similarities and differences in the anatomy of organisms.
    • .
    • Comparative biochemistry or biochemical evolution is the study of differences in chemical (metabolic) processes among species . For example, the difference between carnivorous species of animals and herbivores is included in comparative biochemistry.
  • Comparative Embryology