15.10 Hominid Evolution

Early hominids had larger brains.

Early hominids were better communicators.

As skull size increased, brain size increased.

As skull size decreased, brain size increased.

As skull sizes increased, brain size increased, leading to an increase in tool use

As skull sizes increased, brain size increased, leading to a decrease in tool use

As skull sizes decreased, brain sizes increased, leading to an increase in tool use

As skull sizes decreased, brain sizes decreased, leading to a decrease in tool use

Brain size decreased leading to improved communication/language development and tool usage

Brain size decreased leading to worsened communication/language development and tool usage

Brain size increased leading to improved communication/language development and tool usage

Brain size increased leading to worsened communication/language development and tool usage

Jaw size increased over time

Jaw size decreased over time

Jaw size remained the same over time

Hominid skulls provide evidence of a static species without evolution

Hominid skulls provide evidence of gradual changes in brain size and structure over time

Hominid skulls are identical to modern human skulls

Hominid skulls show no changes in brain size over time

Humans did not change their walking patterns

Humans have evolved to walk less upright

Humans have evolved to walk upright

Jaw size increase, leading to a less diverse diet.

Jaw size decreased, leading to an increase in the manufacturing of tools.

Brain size decreased, creating better ways of communicating with one another.

Brain size increased, causing an improvement in communication and language development.

The jaws of hominids evolved to be larger and more protruding over time

There appears to be no change in the jaw over time

The jaws of hominids changed over time due to a change in brain size

The jaws of hominids evolved to be smaller and less protruding over time