Human EVOLUTION Flashcards Preview

BIO DEATH #4 > Human EVOLUTION > Flashcards

Flashcards in Human EVOLUTION Deck (20):
1

primates

mammal order
-about 250 species/4500 mammal species

2

characteristics of primates

-stereoscopic color vision, boney orbits to protect the eye
-large brain to body size ration
-largely tree-dwelling and tropical

3

arboreal

tree- dwelling

4

adaptations to arboreal and social life

-digits with independent mobility and thumb.
-flat nails, sensitive fingers
-complex facial musculature
-half turn rotation at the elbow and free rotation at the shoulder

5

classification of primates order to humans

haplorhines- anthropoidea- catarrhines- hominoids

6

stepshirhines

wet nosed
lorises, galagos, lemurs

7

haplorhines

dry nosed
us
tarsiiformes, platyrhines, cercopithecoids, hominoids

8

tarsiiformes

tarsiers

9

anthropoidea

simiiformes
us
platyrhines, cercopithecoids, hominoids

10

platyrhines

new world monkeys, spider monkey

11

catarrhines

us
-cercopithecoids, hominoids
-no prehensile tail, 2 pre-molars, narrow nasal septum
-distinguish red and green, locate fruit

12

cercopithecoids

old world moneys

13

hominoids

-apes (including humans)
-brachiation, more erect posture, arms and shoulders
-more flexible, spine stiffer, arms extend laterally
-larger pelvis, loss of tail

14

prehensile tail

long tail to grasp tree branches with

15

brachiation

arm swinging, primates swing from tree to tree
arm over arm

16

orangutan

-hominoid
-fruit eaters, not as social, small family units
-only occasionally on forest floor

17

Gorilla

-catarrhine hominoid
-dominated by male silverback
-male male competition- polygyny
-males almost twice the size as females

18

Chimpanzees

-catarrhine hominoid
-bonobo and chimps
-extended child care, prolonged adolescence (8-10)
-feed and sleep in trees, often on ground
-knuckle walker
-extensive tool use

19

how long ago were hominoids related to eachother

7 mya

20

AMH showed up around

6 mya to 100,000 years ago
in the rift valley of africa