2-3 Characteristics

Question 1

Chordata

Answer 1

notochord
post-anal tail

Question 2

Craniata

Answer 2

usually cartilaginous/bony vertebrae
1-3 pairs of semicircular canals (ears)

Question 3

Agnatha

Answer 3

jawless
No paired fins
median fins

Question 4

Gnathostomata

Answer 4

3 semicircular canals
hinged jaws
paired appendages

Question 5

Urochordata

Answer 5

NC, DNC, PAT ONLY IN LARVA
Have a tunic (outer layer)

Question 6

Cephalochordata

Answer 6

notochord retained in adults
very small (less than 5 cms)

Question 7

Chondrichthyes

Answer 7

cartilagnous endoskeleton persists in adults
lack opercula
some have placoid scales (made from dermal bone)

Question 8

Actinoptery

Answer 8

bony endoskeleton
operculum
rays support fins

Question 9

Sarcopterygii

Answer 9

Internal support skeleton in fins
Functional Lungs
Some with septum in heart

Question 10

Amphibia

Answer 10

integument system with mucous secretions
one cervical vertebrae
young REQUIRE a water source adults do not

Question 11

Amniota

Answer 11

Has amniotic egg
heterodont dentition

Question 12

Reptiles

Answer 12

dry skin with epidermal scales
skulls with one point articulation
ectotherm

Question 13

Mammals

Answer 13

Mammary glands
Hair
Diaphragm that specifically creates negative pressure for breathing

Question 14

Aves

Answer 14

Feathers derived from epidermals scales
Endothermy
Bones with Airspaces
Horny Bill