EVOLUTION

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EVOLUTION

• A Look At The Evidence

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Evolution

• Definition In the simplest context it is change
  (in populations) over time.
• The Theory of Evolution has become the
  cornerstone concept in the field of Biology.

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• The Evidence

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What is the Evidence?

• Geological Time
• Fossil
• Embryonic and Vestigial structures
• Morphological
• Artificial Selection
• Molecular and Genetic
• Natural selection (Today)

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Geological Time

• The age of the Earth is a critical component to
  the evolutionary process.
• Change over Time
• Earth is between 4-5 Billion years old.

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Fossil Evidence

• Traditional evidence of evolutionist
• Incomplete record (Missing links)
• Subject to Interpretation
• Requires time

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Fossil evidence
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Fossil Evidence
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Fossil Evidence
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Fossil evidence
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Embryonic

• All Vertebrate animals go through similar
  embryonic stages
• At some point in development all
• Have a Tail
• Have Gills
• Have Flippers (Arms and Legs)
• Single Chambered Heart
• Open Nerve Cord

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Embryonic
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Morphological

• Morphological or Homologous structures are those
  that have a common evolutionary origin and may
  have similar functions.
• Example Forelimbs of many animals have the same
  bone origins

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Homolog's
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Homologs
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Homologs
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Structural Adaptation

• Camouflage
• Mimicry
• Analogs

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Camouflage
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Natural selectionMimicry
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Artificial Selection

• Artificial Selection has been going on for 10,000
  years
• Started with domestication of plants and animals
• Continues today with selective breeding of
  animals and plants

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Molecular
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Evidence

• Today, great strides are being made in the area
  of genetics to show relationships between
  organisms
• Man and Chimps share 98 of the same genetics.
• All life forms have a common core of genetic
  similarities.

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Evidence

• Collectively, Fossil, physiological,
  embryological, genetic evidence all point to a
  common life ancestral form.
• What is the mechanism that drives evolution