8.7 Human Evolution
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Transcript of 8.7 Human Evolution
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8.7 Human Evolution
Pages 358-365
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Our uniqueness
• Complex reasoning abilities• Enormous aptitude for learning• Design and use of tools• Language
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Physical
• Large brain• Fine motor skills• Bipedal
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Examples
• Prosimians
• Anthropoids
• Hominoids
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Cladogram
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DNA
• Humans and chimpanzees share 98.8% of their DNA
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Primates
• Large brains• Forward looking eyes• Arms that rotate• Flexible hands and feet• Opposable thumbs• tails
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Early ancestor
• 60-70 mya
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Fossils
• Skull size• Hips, feet, leg bones, insteps• Tools and burial sites
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Timeline
• 6-7mya Sahelanthropus walked upright
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Timeline
• 3.4 mya• Australopithecus aferensis
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Timeline
• 3.6 mya
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Timeline
• 2mya• Homo habilis (handy man)
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Out of Africa
• 1.9 mya• Homo erectus wanders throughout Europe
and Asia
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Timeline
• 200 000-800 000 ya• Homo heidelbergensis
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Timeline
• 500 000 ya• Homo neanderthalensis• Europe
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Timeline
• 100 000 ya• Homo sapiens
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The last 1000 generations…
• Developed agriculture• Lived in cities• 6000 languages• Rituals, customs, belief systems
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The last 10 generations…
• Human population explosion
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Current human evolution
• Lactose tolerance• Sense of taste• Medicine suppresses our natural response to
illness.• Vitamin D• CCR5-D32 gene protects 10% of Europeans
from HIV disease