Lesson 6.1

Question 1

Changes in skull over evolution

Answer 1

Zygomatic arches
Masseter muscle
Occipital bun
Foramen magnum
Supraorbital ridge
Sagital crest
Mandible
Maxilla
Teeth
Prognathism

Question 2

Zygomatic arches

Answer 2

Get smaller, proportional to jaw size because attachment for musculature

Question 3

Occipital bun

Answer 3

Accomodates big brain prominent in Neanderthals

Question 4

Masseter muscle

Answer 4

Used for chewing and grinding
Affects angle
Decreases

Question 5

Brow ridges

Answer 5

Become less prominent and decrease in size
Used to reduce the stress on other face bones for those with big jaws

Question 6

Sagital crest

Answer 6

Only in paranthropus and some afarensis not super important tho

Question 7

Mandible

Answer 7

Decreased in size, got a chin, gets shorter

Question 8

Maxilla

Answer 8

Diastema in early ones

Question 9

Teeth

Answer 9

Dental arcade went from u shaped to parabolic
Less specialised and more uniform

Question 10

Prognathism

Answer 10

Decreased