Problem
A. Examine the phalanges of the cat and coyote. What do you notice that is different about the claws of these animals?
B. What is different about the bones in the 'arm' and the phalanges of the porpoise compared to other skeletons?
C. What is the origin of porpoise two oval-shaped bones?
D. What is the origin of these two bones in the snake?
E. What bones make up most of the bat's wings?
F. Bats hang from two 'hooks' that are on their wings. What are these hooks derived from?
G. What do you notice that is different about the bird wing compared to the bat wing?
H. What modifications do bird and bat have to the structure of their forelimbs that allow them to survive and obtain food?
I. Why do you think some intermediate-aged skulls have very large canine teeth, while some older and more modern specimens do not?
J. Summarize the major changes that have taken place in skull morphology from the common ancestors with chimpanzees to modern humans and Neanderthals.