Flashcards in HUMAN ANATOMICAL EVOLUTION Deck (9)
What are primates
type of mammal that are members of the mammalian order 'primates'
defined by a suite of anatomical and behavioural traits
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
What is a hominin
members of the family Hominini
includes genus homo but excludes genus gorilla.
What is a hominoid
Opposite of hominin
apes are included but not humans
What is a hominid
includes all humans as well as great apes (orangutans, gorillas, bonobos and chimps)
- dental features
- large brain size
- tool making behaviour
What is mosaic evolution
Where some characteristics evolve while others are not at that timw
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
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