Evidence for Evolution

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Evidence for Evolution

• Ideas that shaped Darwins thinking

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• The story of the Soapberry bug and the antibiotic
  resistant bacteria.

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• Natural selection is a process of editing, not a
  creative mechanism.
• A drug/fruit does not create a different species
  it selects for specific traits in a population
  that allow it to survive it that specific
  environment.

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Ideas that shaped Darwins thinking

• Prior to Darwins Theory of Evolution there were
  4 scientists that had their own ideas and
  theorys
• 1. Hutton
• 2.Lyell
• 3.Lamarck
• 4. Malthus

The Rock Boys!!
The Math guy!
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James Hutton

• Helped scientists understand that Earth is many
  millions of years old
• Processes that changed the Earth in the past are
  the same processes that operate in the present

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Charles Lyell

• In Lyells book Principles of Geology
• Rock Cycle Volcanoes and Earthquakes
• Erosion continues to carve out canyons.

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Uniformitarianism

• Uniformitarianism the natural laws and processes
  that operate in the universe now, have always
  operated in the past.

How do you pronounce that??
Uniformitarianism
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Jean-Baptiste Lamarck

• Use or disuse of organs, organisms acquired or
  lost certain traits during their lifetime.
• Traits could then be passed on to their
  offspring.

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Thomas Robert Malthus

• Malthus reasoned that if the human population
  continued to grow unchecked, sooner or later
  there would be insufficient living space and food
  for everyone.
• Supporting Darwins thought that only those who
  have the best traits for the environment will
  find the space, food, etc.

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Thomas Robert Malthus

• He theorized that there was a carrying capacity
  in every habitat/ environment
• Populations will naturally get checked by famine,
  disease etc.

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Darwins Theory of Evolution

• 1. Change over time, common ancestor
• Pre-existing variation
• 2. Variation within a population or species
• Everyone is just a little different
• 3. Natural selection
• Adaptations
• Survival of the fittest

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Darwins Evidences

• 1. Fossil Record
• 2.Biogeography Geographical
• 
  Distribution
• 3. Vestigial Organs
• 4. Similarities in Structure
• Homologous Structures
• 5. Similarities in Early development
• Embryology

Yes, I can support it!
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1. Fossil Record

• Preserved remains or markings left by organisms
  that lived in the past are called fossils.

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• Comparing fossils to present day organisms not
  only show changes but also what species have
  become extinct.
• Position of fossils can reveal their age.

Younger Older
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2. BIogeography

• Organisms in different parts of the world shared
  similarities (continental drift)
• Ex. Endemic species

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3. Vestigial Organs

• Organs of many animals are so reduced in size
  that they are just vestiges, or traces, of
  homologous organs in other species

I have a pelvis!!!
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4. Similarities in structures

• Homologous structure same basic structure but
  different function
• Analogous structure same basic function, but do
  not have the same basic structure

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Homologous

• Homologous structures similar structures but
  have different function
• Derived from a common ancestor different
  environment conditions
• Ex. Forelimb

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Analogous

• Analogous structures similar function but not
  similar in structure
• Not derived from a common ancestor same
  environmental conditions
• Ex. A butterfly wing and a bird wing

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5. Similarities in Early development

• Common pattern in the development
• In their early stages, chickens, turtles, and
  rats look similar, providing evidence that they
  shared a common ancestor
• Posterior tail, pharyngeal pouches

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Lets Play a Game

• Adopt an Embryo!
• Select one embryo to adopt as your own!!

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Class Activity

• Adopt an Embryo!
• 1 2 3 4 5 6 7 8

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Adopt and Embryo

• Stage 2
• 1 2 3 4 5 6 7 8

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Adopt an Embryo

• Stage 3

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Darwins Evidences

• 1. Fossil Record
• 2.Biogeography Geographical
• 
  Distribution
• 3. Vestigial Organs
• 4. Similarities in Structure
• Homologous Structures
• 5. Similarities in Early development
• Embryology

Yes, I can support it!
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• Evolution.just a theory.
• Life has changed over time, documented and
  supported

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Homologous vs. Analogous Activity

• Homologous Structure

• Analogous Structure

• Same Structure different function

• Same function different structure

• Instructions
• Read
• Define
• Color
• Chart
• Answer Questions