Transcript
Page 1: Paleontology, Homology, and Evolution

Paleontology, Homology, and Evolution

May 22, 2013

Page 2: Paleontology, Homology, and Evolution

Paleontology, Homology, and Evolution

• Paleontologists use homology to understand the evolution of organisms!

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Paleontology, Homology, and Evolution

• Paleontologists use homology to understand the evolution of organisms!

DERIVED CHARACTERISTICS

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Derived Characteristics

• A trait that has been passed down from the ancestral organism

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Derived Characteristics

• A trait that has been passed down from the ancestral organism

– Multicellular– Vertebrates– Mammals

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Derived Characteristics

• Trace back to understand evolution– Good example are horses and their ancestors• Using a number of morphological traits, they can trace

back the ancestry of modern horses.

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Whales

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Paleontology

• It is your job now to become the paleontologists and find what is in the soil.

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Paleontology

• Use the pictures of modern organisms to try and figure out what where the fossils come from!

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What did your fossil organism(s) look like?

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What did your fossil organism(s) look like?

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What did your fossil organism(s) look like?

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What did your fossil organism(s) look like?

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What could you tell about the behavior or environment?

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What could you tell about the behavior or environment?

• Fossils are found right here in LA at the La Brea tar pits.

• Take a look at the fossils from the tar pits-what can we tell about these organisms?

• How did they get trapped in the tar pit?

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Dire WolfCanus dirus

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BisonBison antiquus

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Other organisms

• Camels (Camelops hesternus)

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Other organisms

• Ground Sloth (Paralmylodon harlani)

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Other organisms

• Mammoths (Mammuthus columbi)

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Other organisms

• Smilodon (Smilodon fatalis)

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Other organisms

• California dogwood (Cornus californica)

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Other organisms

• White Sage (Salvia apiana)

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Environment

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La Brea


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