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History of Evolutionary Thought. Engage. Can you tell a chicken from a fish? A human from a turtle? http://www.pbs.org/wgbh/nova/beta/evolution/guess-embryo.html Sure you can…complete “Timing is everything” activity

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  • Can you tell a chicken from a fish? A human from a turtle? http://www.pbs.org/wgbh/nova/beta/evolution/guess-embryo.html
  • Sure you can…complete “Timing is everything” activity
  • When you are done get your INB ready for cornell notes on the History of Evolutionary Thought.


the evolution of evolution
The Evolution of Evolution

Catastrophism  Uniformatiarianism

Lamarck  Darwin

problems with lamarck s theory of evolution
Problems with Lamarck’s Theory of Evolution
  • Inheritance Of Acquired Traits
    • Traits Acquired During Ones Lifetime Would Be Passed To Offspring

What happened in 30-50 MY’s?

contributor s to darwin s thinking included
Contributor’s to Darwin’s thinking included:


  • Charles Lyell - proposed earth formed MYA not thousands of years ago
  • Thomas Malthus – struggle for existence through available resources
contributor s to darwin s thinking included1
Contributor’s to Darwin’s thinking included:


  • John Baptiste Lamarck 1700’s – Inheritance of acquired CharacteristicsandLaw of Use and Disuse
  • Alfred Russel Wallace – came to the same conclusions as Darwin

Hardy-Weinberg– researched changesin allelic frequencies. For example, what might happen in a population of mice, if their ability to run quickly and escape predation was due to a single genetic trait?

  • 1st to group similar organisms and assign them Latin names (Taxonomy)
  • Binomial Nomenclature (Genus species)
voyage of the beagle
Voyage of the Beagle

Charles Darwin

  • Wrote On the Origin of Species by Means of Natural Selection AKA The Origin
    • Fossil Record
    • Taxonomy
    • Comparative Anatomy
    • Comparative Embryology
    • Biogeography
darwin left england in 1831
Darwin Left England in 1831

Darwin returned 5 years later in 1836

the galapagos islands
The Galapagos Islands
  • Small Group of Islands 1000 km West of South America
  • Very Different Climates
  • Animals On Islands Unique
      • Tortoises
      • Iguanas
      • Finches
the galapagos islands1
The Galapagos Islands
  • Finches resembled a mainland finch
  • More types of finches appeared where the available food was different (seeds, nuts, berries, insects…)
  • Finches had different types of beaks adapted to type of food gathering…ex of:Speciation

How did the finch speciation occur? What environmental, genetic, physical changes took place?

explore your choice of activities
Explore your choice of activities
  • What a Beak Activity (UTDanaCtr) can be used to elaborate on speciation/ natural selection
  • Peppered Moth Activity (UTDanaCtr) can be used to elaborate natural selection due to environmental changes.
  • Easter Island Activity (UTDanaCtr) can be used for natural selection due to human impact
  • Natural Selection lab can be used
evolution basics
Evolution Basics
  • Evolution is a gradual change in the characteristics of a species over time. The structures, behaviors, interactions, and internal processes observed in the millions of species on this planet are the result of the process of evolution.
  • Charles Darwin stated that evolution by natural selection explained how populations of organisms evolve.
evidence to support evolution
Evidence to support Evolution
  • Embryology
  • DNA sequences
  • Fossils
  • Anatomical structures
1 embryology
1. Embryology
  • Similarity in embryo development shows a closerelationship (vertebrate embryos all have tail & gill slits)

Sure you can…complete “Timing is everything” activity



by comparing the DNA sequencesof two organisms or the amino acid sequences made from the DNA, scientists can learn which organisms are related; the more DNA two organisms have in common, the closer related they are


Using the table, compare the amino acid sequence of the chimp and the human.

Notice that for this protein the chimp and human have the exact same sequence.

Now compare the baboon and the human.

Notice that there are 5 differences in the sequence.

This tells you that the human is more closely related to the chimp than the baboon.





  • In undisturbed layers of sedimentary rock, the deeper it is, the older it is.
  • Give us information about extinct species.
anatomical structures
Anatomical structures
  • An inherited trait that increases the population’s chances of survival and reproduction is an adaptation

homologous structures:

  • structure with different functions found in different species and thought to be inherited from common ancestors

ex: whales, cats and birds all have the same # and type of bones in the forelimbs but their functions are different


analogous structures:

  • have the different structures but the same function & do not show a close relationship
  • Come up with your own examples


  • DNA Sequences
  • phylogeny
  • survival of the fittest
  • homologous structures
  • anatomical similarities
  • analogous structures
  • natural selection
  • embryology
  • sedimentary rock
  • variation
  • adaptation
  • vestigial organs
  • speciation
  • fossils
  • camouflage
  • mutation
  • mimicry
  • speciation
  • niche
  • species
  • extinction
  • common ancestor