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Biology/Zoology Lab Help
A return to a radiate form: Echinodermata

Species
Pharyngeal slits
Adult dorsal nerve cord

Jaws

Bony skeleton
Eyes
Gills
Teeth
Deuterostome

Closed circulatory system
Complete digestion system
Total

UrochordataTunicates
1
0
0
0
0
0
0
0
0
1
0
0
1
3

PlacodermsJawed fish
1
1
0
1
1
0
1
1
0
1
1
1
1
10

MyxiniHagfish
1
1
1
0
0
0
0
1
1
1
0
1
1
8

CephalochordataLancelets
1
1
0
0
0
0
0
1
0
1
0
1
1
6

ChondrichthesShark
1
1
0
1
1
0
1
1
1
1
1
1
1
11

PetromyzontidaeLamprey
1
1
1
0
0
0
1
1
1
1
0
1
1
9

OstracodermsJawless fish
1
1
0
0
0
0
1
1
0
1
1
1
1
8

ActinopterygiiMost fish
1
1
0
1
1
1
1
1
1
1
1
1
1
12

SarcopterygiiCoelocanth
1
1
0
1
1
1
1
1
1
1
1
1
1
12

EchinodermStar fish
0
0
0
0
0
0
0
0
0
1
0
0
1
2