HUMAN ANATOMICAL EVOLUTION Flashcards Preview

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Flashcards in HUMAN ANATOMICAL EVOLUTION Deck (9)
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1

What are primates

type of mammal that are members of the mammalian order 'primates'

defined by a suite of anatomical and behavioural traits

2

What traits define a primate

Specialised limbs and locomotion: nails instead of claws, thumbs, allows quadrapedalism, vertical clinging/brachiation

Lack of dietary specialisation reflected in dentition

Visual acuity and reduced sense of smell: best vision due to eyes being more front (visual field more condensed, better detail)

Neocortex expansion: larger expansion for vision and not smell (a snout does not necessarily measure smelling strength

3

What is a hominin

members of the family Hominini

includes genus homo but excludes genus gorilla.

4

What is a hominoid

Opposite of hominin

apes are included but not humans

5

What is a hominid

includes all humans as well as great apes (orangutans, gorillas, bonobos and chimps)

defined by:
- dental features
- bipedalism
- large brain size
- tool making behaviour

6

What is mosaic evolution

Where some characteristics evolve while others are not at that timw

7

What is the multi regional hypothesis

homo erectus evolved in africa then spread to other continents. While this happened interbreeding occurred finally making homo sapiens

issues of this include that if the species spread out from africa how did we all end up the same

8

What is the replacement model

a first species spread out from africa. Then back in africa homo sapiens were produced.

They then spread out replacing all other species.

If this was true, african DNA should have highest variation which was found true + most fossils are found in africa

9

What was the human migration pattern

africa

middle east, asia, australia

europe

north america (later due to ice age)

south america