Lab 2 - Human Feet are Strange

Question 1

primate that is most closely related to humans

Answer 1

chimpanzees

Question 2

when did the common ancestor of humans and chimpanzees live

Answer 2

6-7 million years ago

Question 3

walk on four limbs

Answer 3

quadrupedal

Question 4

chimpanzees are also described as

Answer 4

knuckle-walkers

Question 5

walk on two legs

Answer 5

bipedal

Question 6

trail of footprints that were made in what is now East Africa about 3.6 million years ago

Answer 6

Laetoli trackway

Question 7

when was Laetoli trackway made

Answer 7

3.6 million years ago

Question 8

where was the Laetoli trackway made

Answer 8

East Africa

Question 9

materials used in lab 2

Answer 9

per group
1. 1mX3m strip of white paper
2. 2 disposable aluminum pans
3. 1 big basin of water for washing feet
4. paper towels or clean cloth for drying feet
5. two chairs
6. one meterstick
7. one copy of Laetoli trackway

per class
1. two rolls of wide masking tape or duct tape
2. two big bottles of washable finger paint
3. one roll of large-size black trash bag

Question 10

title of film watched in lab 2

Answer 10

Great Transitions: The Origin of Humans

Question 11

fossil footprints are referred to as

Answer 11

trace fossils

Question 12

same species as “Lucy” fossil

Answer 12

Australopithecus afarensis

Question 13

labels of the two footprints in the Laetoli trackway

Answer 13

G.1
G.2/3

Question 14

Modern chimpanzee footprints

Answer 14

1. tracks may include knuckles prints
2. big toe not in line with stride
3. feet lack arch
4. no push-off from big toe

Question 15

Modern human footprints

Answer 15

1. do not have knuckle prints
2. big toe in line with stride
3. feet display prominent arch
4. push-off from big toe