Aim: Who came first? An exercise on Human Evolution
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Transcript of Aim: Who came first? An exercise on Human Evolution
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Aim: Who came first? An exercise on Human Evolution
HW #14
Chapter 32 read pages 833-841
Motivation: tie your shoe laces without your thumb
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Arrange the skulls according to who you think came first
• Make a list of the skull characteristics that you are looking at to determine who came first
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Aim:What are the characteristics of Hominids?
………Humans share a common ancestor with other primates, we did not evolve
from them
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Use your detective skills and Look at the tracks and answer
the following questions
1. Who probably made the tracks?2. How were they moving , walking,
running?3. What interactions do the tracks
suggest?
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What are the characteristics of Hominids?
• In 1976, members of a team led by Mary Leakey discovered the fossilized footprints of human ancestors in Laetoli, Africa. The footprints were formed 3.5 million years ago when at least two individuals walked over wet volcanic ash. The wet ash hardened like cement and was then covered by more ash.
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Characteristics of the Hominid Family
• Able to walk upright
-hominid footprints at Laetoli in Tanzania
• Developed thumbs
• Developed large brain (more brain matter)
Lucy
The Benchmark of
Human
Ancestry
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Section 32-3
Modern GorillaModern Human
Comparing Human and Gorilla Skeletons
Modern Human Modern GorillaSkull atopS-shaped spine
Spinal cord exitsat bottom of skull
Arms shorter thanlegs; hands do not touch groundduring walking
Pelvis is bowl-shaped
Thigh bones angledinward, directlybelow body
Skull atopC-shaped spine
Spinal cord exitsnear back of skull
Arms longer thanlegs; hands touch ground during walking
Pelvis is longand narrow
Thigh bones angledaway from pelvis
Building bodies that stand up
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Cladogram of Hominid evolution
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Hominid Migration and the development of culture