Chapter 1.5

Question 1

What are the closest primate relative to homo-sapiens?

Answer 1

Chimpanzee - only 1.6% difference in DNA structure compared to humans

Question 2

What are Vestigial Organs?

Answer 2

Remnants of organs that apparently were better developed and more functional in the ancestors of a species. They now serve little or no purpose.

Ex: Piloerector muscle (hair follicle muscles) - humans are no longer covered in hair for warmth

Question 3

What is Bipedalism?

Answer 3

Standing and walking on 2 legs. This helps spot predators, carry food or infants.

Question 4

What are so adaptations for bipedalism?

Answer 4

• skeletal and muscular modifications
• increased brain volume
• family life and social changes

Question 5

List the bipedal evolutionary names

Answer 5

Australpithecus - oldest bipedal primate

Homo Genus - 2.5 million years ago (taller, larger brain)

Homo erectus - 1.8 million years ago ( mirgated from Africa to Asia)

Homo Sapiens - originated in africa 200,000 years ago