How evolution works

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How evolution works
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How evolution works
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• What animal did Darwin specifically notice that
  inspired his theory on evolution?

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• Finches (birdies)

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• What was it about the finches that Darwin noticed?

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• Differences in beak size and shape and how it
  suited its environment.

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• What was did Darwin name the process that
  explains HOW he thought evolution occurred?

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• Natural Selection

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• What are the four steps that explain Natural
  Selection?

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• Overproduction
• Genetic variation - Diversity
• Struggle to survive - competition
• Successful reproduction - Selection

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• What determines whether or not animals are of the
  same species?

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• If they can produce fertile offspring, they are
  the same species!

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• What are the solidified remains or imprints of
  once living things called?

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• fossils

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• What three influences helped Charles Darwin come
  to his conclusion?

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• Farmer, animal and plant breeders (selective
  breeding)
• Geologists (lyells principles of geology
  mentioned age of the earth)
• Thomas Malthus (overproduction of offspring)

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• A change in an organisms genes that results in a
  variation or physical difference is called a?

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• mutation

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• What is the name of the process in which natural
  selection takes place over and over for millions
  of years resulting in a new species?

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• Speciation

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• What are the three steps of speciation?

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• Separation
  (a physical feature separates
  member of the same population)
• Adaptation
• (new environments occur causing animals to adapt
  to their new surroundings)
• Division
• (this takes place over millions of years
  eventually resulting in a new species)

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• What is the process by which populations change
  over time through inherited changes eventually,
  over millions of generations, resulting in new
  species

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• evolution

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• What are the pieces of evidence that lead
  scientists to believe Darwins theory was correct?

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• Fossils and the fossil record
• Vestigial structures
• Comparative anatomy
• (comparing skeletons)
• Comparing embryonic structures (Ontogeny
  recapitualtes Phyllogeny)
• Comparing DNA from different species

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• What is a mold?

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• An imprint of a once living thing or tracks of a
  living thing

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• What is a cast?

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• A cast is a mold filled in with sediment

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