deuterostome animals Flashcards
1
Q
a series of tubes and chambers the radiates throughout the body, forming a sophisticated hydrostatic skeleton
A
water vascular systems
2
Q
what do Echinoderms often use their feet for?
A
they play a key role in obtaining food
3
Q
what are types if Echinoderms?
A
- feather stars and sea lilies
- sea stars
- brittle stars and basket stars
- sea urchins and sand dollars
- sea cucumbers
4
Q
some synapomorphies of
Echinoderms
A
- radial symmetry in adults
- exoskeleton of calcium carbonate
- water vascular systems
5
Q
what major lineages are included in deuterostomes?
A
1 Echinoderm
2 hemichordates
3. xenoturbella
4. chordate
6
Q
what do chordate a include?
A
vertebrates
7
Q
Echinoderms
A
- exclusively marine
- bilaterians
- have bilaterally symmetric larvae
4 pentaradial symmetry - endoskeleton
- water vascular system
8
Q
at some point in their life all chordate a have:
A
- pharyngeal gill slits
- dorsal hollow nerve cord
- notochord
- muscular post anal tail
9
Q
invertebrates within the chordate group
A
cephalochordates
Urochordates
10
Q
synaphorphies of vertebrates
A
vertebrae
cranium
11
Q
forebrain
A
smell
12
Q
midbrain
A
vision
13
Q
hindbrain
A
hearing
14
Q
grade
A
a sequence of lineages that are paraphyletic
15
Q
are reptiles more closely related to mammals or amphibians?
A
mammals
