Hominid evolution

1.Over time our ancestors developed ?????? brains- specially cerebrum and

Increase in cranial capacity.

• larger

• smaller

Tags

NGSS.HS-LS4-2

Our ancestors showed changes in skull shape, including ?????? in size

of brow ridge (section of bone above eye)

• increase

• decrease

Tags

NGSS.MS-LS4-2

Our ancestors showed an ?????? in jaw size and angle at which jaw

protrudes from face

• (increase/

• decrease

Tags

NGSS.HS-LS4-4

Our ancestors showed a ????????? in the number of teeth and tooth size

• increase

• decrease

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-1

What is the blue part of the brain called?

What is the yellow part called?

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NGSS.HS-LS1-2

What is the green part called?

What is the red part called?

Scientists have found that about 2.4 million years ago a gene regulating jaw muscles

mutated and may have led to the more graceful human jaw we see today. The

diagram below shows the skulls of 3 hominid species.

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

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

• C.There appears to be no change in the jaws of hominids over time.

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

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

NGSS.HS-LS3-2

NGSS.HS-LS4-1