First Test

Question 0

Phylum hemichordata

Answer 0

Pharynx w/ slits, dorsal hollow nerve cord, stomochord, no post anal

Question 1

Phylum Chordata

Answer 1

Multicellular, triploblastic, deutrostomes, coelom, complete gut tube, bilateral symmetry, notochord, dorsal hollow nerve cord, pharynx w/ slits, post anal tail, endostyle

Question 2

Phylum cephalochordata

Answer 2

Lancelets, amphioxus , branchiostoma,

No vertebrae, some cephalization, Asymmetry in myomeres

Question 3

Subphylum Urochordata

Answer 3

Tunicates, sea squirts, pharyngeal slits,

Notochord in tail of larvae, filter feeders, tunic of cellulose

Question 4

Subphylum vertebrae

Answer 4

About 500 may, about 50,000 species, true brain, well developed eyes, extreme cephalization, thyroid, solid liver, hepatic portal blood system, gall bladder,

Question 5

Agnatha

Answer 5

Without jaw

Question 6

Gnathostomes

Answer 6

With jaw

Question 7

Amniotes

Answer 7

Extra embryonic membrane

Question 8

Class Agnatha

Answer 8

Jawless fish, first vertebrae, most primitive body plan

Question 9

Subphylum myxinoidea

Answer 9

Hagfish, no jaw bone or scale , sucking mouth , mucous glands

Question 10

Subclass Petromyzontida

Answer 10

Lamprey, no jaw bones or scales, rasping tongue many are parasites

Question 11

Subclass ostracodermi

Answer 11

First vertebrates, 500 mya, first bone, filter feeders, no jaw

Question 12

Class placodermi

Answer 12

400 mya, all extinct, armored fish, first jaw, jaws from first pharyngeal arch, paired appendages, gas bladder

Question 13

Class Chondrichthyes

Answer 13

400 mya, cartilage fish, evolutionary dead end

Question 14

Class Osteichthyes

Answer 14

400 mya, bone fish, over 25000 species, bony scales

Question 15

Subclass actinopterygii

Answer 15

Ray finned fish, fin muscles inside body wall

Question 16

Subclass sarcopterygii

Answer 16

Lobe finned fish, fin muscles are in the fish, point of evolution from fish to tetrapods