Biology 12

Chapter 12 Adaptation and Speciation • MHR 409

Post-lab Questions

1.Compare the three skulls in terms of the following

traits.

(a)face-to-brain area

(b)cranial capacity

(c)jaw angle

2.Describe other differences in the skulls that you

could use to determine evolutionary relationships.

Conclude and Apply

3.Which characteristics of Australopithecusappear

to be like the ape? Which appear to be like the

modern human?

Exploring Further

4.Use library or Internet resources to obtain

illustrations of gorilla and Australopithecus africanus

skeletons. Describe their similarities and differences.

Australopithecus

1/4 natural size

brow ridge

sagittal crest

brow ridge

Gorilla

1/4 natural size

Modern human

1/4 natural size