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Flashcards in Mammals Part II Deck (44)
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1

Characteristics of Primates

arboreal ancestor

2

Characteristics of Primates

grasping limbs with opposable thumbs

3

Characteristics of Primates

foward facing eyes

4

Characteristics of Primates

big cerebrum

5

what are the two major groups of primates?

prosimians and anthropoids

6

what percent of primate species are in danger of extinction?

48%

7

Characteristics of prosimians

arboreal and nocturnal

8

examples of prosimians

lemurs and lorises

9

anthropoids: tarsier

- not on the phlyogenetic tree

10

tarsier is the only entirely _____ primate

carnivourous

11

Difference between old world monkeys and new world monkeys

most new world monkeys have a prehensile tail - used to grasp/hold objects

12

Difference between old world monkeys and new world monkeys

new world monkeys have flat noses and tend to be arboreal

13

characteristics of gibbons, orangutans, and african apes

lack tails

14

gibbons

smaller than other apes
- arboreal

15

Orangutangs

too large to cross from tree to tree by branches - they have to walk

16

what is the sole hominid to inhabit the earth in the last 30,000 years?

homo sapiens

17

how has the skull changed over time?

the face has gotten narrower

18

australopithecus are all

extinct

19

Homo habilis

"handy/skillful"

20

what homo species is believed to be the first hominid to leave africa?

homo erectus

21

homo neanderthalensis are

short, stalky but powerfully built

22

why did humans evolve larger brains?

- main hypothesis: early Homos used symbolic spoken language and tools extensively - triggering selection for larger brains
- evidence: larger ares - relative to other early hominids - for language in brain

23

homo sapiens and neanderthals...

interbred :O

24

what caused the extinction of homo floreinsis

volcanic eruption

25

CNS

central nervous system

26

PNS

peripheral nervous system

27

CNS

dorsal, hollow tube of nervous tissue

28

brain

large cephalic ganglion

29

bone protects both the

brain and spinal cord

30

PNS is a system of

lateral nerves