LAB ACTIVITY 4 Flashcards
What is the title of Lab Act 4?
Human Feet are Strange
Other primates along with Humans
- Orangutans
- Gorillas
- Lemurs
- Baboons
- Chimpanzees
Among living primates, humans are most closely related to _______
Chimpanzees
What trait that distinguish humans from all primates, including chimpanzees?
Walking
Chimpanzees are primarily _____
Quadrupedal
Quadrupedal means
waliking on four limbs
Chimpanzees are also described as ________
knuckle-walkers
Why are Chimps also described as knuckle-walkers?
Chimpanzees move with their hands turned under so that their knuckles make contact with the ground
Humans are _____
Bipedal
Bipedal means
walk on two legs
How does human walk?
We walk with our feet close together and directly underneath our hips, enabling us to balance on one leg while the other leg swings forward
Chimpanzees can also walk in two legs for only a ____ _____
short distance
Why does Chimps can walk in two legs for a long distance?
Because their feet are not directly under their hips, they sway side to side to help maintain balance when walking on two legs
It is a trail of footprints left in soft volcanic ash about 3.6 million years ago that quickly hardened into a cement-like surface after it was rained on
Laetoli trackway
Fossil footprints are referred to as ____ ____, they provide ____ evidence of past life
- Trace fossils
- indirect
What species is the same as the famous “Lucy” fossil?
Australopithecus afarensis
Footprint characteristics of Modern Chimpanzee
- Tracks may include knuckle prints
- The big toe is not in line with the stride
- The feet lack arches
- There is no push-off from the big toe
Footprint characteristics of Modern Human
- Tracks do not have knuckle prints
- The big toe is in line with the stride
- The feet display prominent arches
- There is push-off from the big toe
