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Evolution Of Humankind > African Apes & Humans Compared > Flashcards

Flashcards in African Apes & Humans Compared Deck (9)
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1

Is it true to say that humans evolved from African apes?

No, it's not. The two groups evolved from a common ancestor.

2

What are the anatomical similarities between Apes and humans?

- lack external nails
- hands with opposable thumbs
- have fingers and toes with flat nails
- eyes that face forward
- molar and premolars teeth with low and rounded cusps.

3

What are their are their anatomical differences?

- skeletal differences
- skull differences
- brain differences

4

What is the main skeletal difference?

Habitual bipedalism in humans

5

What are the skeletal differences between apes and humans

Apes:
- arms longer than legs
- fingers and toes long and curved
- big toes, divergent
-hip ones large

Humans:
- arms shorter and weaker than legs
- fingers and toes short and straight
- thumbs grasp easily
- shorter, broader pelvis
- longer femurs
- spine curvature, two major curves > thoracic and lumbar

6

How are human brains different from apes?

Humans have much a larger brain, especially cerebral cortex

7

What unique qualities is brain responsible for?

- tool making
- use and control fire
- use highly developed language

8

What are the skull differences?

- Humans don't have pronounced brow ridges
- Foramen magnum found centrally under skull in humans,apes at rear end of skull
- humans have large brain case, small jaws, nearly vertical face & chin
- canine of teeth of humans are relatively small, apes large and pointed

9

What similarities tell us that humans closely resemble African apes?

Physical and genetic similarities.