BIO EXAM 3 LEC 15

Question 1

Chordate Characteristics

Answer 1

Presence of a notochord–rod
of stiffened, but flexible, helps support the body
2 The nerve cord runs parallel with the notochord and gut, anterior
end develops into the brain
3) Gill slits penetrate the wall of gill slits penetrate the wall of a
pharynx
4) Tail extends past an anus
least

Question 2

most chordates are

Answer 2

coelomate, bilateral
animals

Question 3

all chordate characteristics are present during

Answer 3

embryo stage

Question 4

UROCHORDATA

Answer 4

Invertebrates

Question 5

CEPHALOCHORDATA

Answer 5

invertabrates

Question 6

VETEBRATA

Answer 6

Vertebral column
evolves from primitive
notochord, composed of ind.
vertebral bones separated by
disks (ligaments)

Question 7

chordate sub phylum

Answer 7

urochordata, Cephalochordata, vertabrata

Question 8

THE UROCHORDATES

Answer 8

– Sea squirts
(tunicates

Question 9

urochordata type of swoimmers

Answer 9

Larvae are bilateral swimmers! Display all

Question 10

urochordata adulkts display

Answer 10

reversal

Question 11

urochordata have a jelly like

Answer 11

tunic aroiund pharynx

Question 12

urochordata size

Answer 12

most only a few cm long

Question 13

urochordata live

Answer 13

Live in a wide range of aquatic habitats

Question 14

urochordata are what kind of feeders

Answer 14

Filter feeders

Question 15

filter feeders

Answer 15

– siphon, gill slits, out another

Question 16

pharynx is a

Answer 16

respiratory organ

Question 17

Cephalochordata size

Answer 17

Only 3 to 7cm long

Question 18

Cephalochordata body displays

Answer 18

all chordate features throughout life

Question 19

Cephalochordata have a

Answer 19

head and a simple brain, includes neurons

Question 20

Cephalochordata have segmented

Answer 20

muscles

Question 21

cephalachordata are what kinbd of feeders?

Answer 21

filter feeders

Question 22

cephalachordata

Answer 22

Lancelet

Question 23

Lancelet

Answer 23

closest relative to Sub-Phylum “Vertebrata

Question 24

vertabrata pharynx completely shifts to

Answer 24

gas exchange

Question 25

vertabrata eccessory digestive organs

Answer 25

liver, pancrea

Question 26

vertabrata what kind of heart

Answer 26

chambered

Question 27

vertabrata have a tripartite brain meaning they have what parts?

Answer 27

forebrain, midbrain, hindbrain

Question 28

vertabrata have what kind of sensroy structured

Answer 28

advanced

Question 29

vertabrata have hemoglobin which has an

Answer 29

affinity for oxygen in red blood cells

Question 30

vertabrata has these 2 things K.ES

Answer 30

kidney, and endocrine system

Question 31

vertebrata has 2 classes

Answer 31

myxini(hagfish), Petromyzontida (lamprey)

Question 32

hagfish introduces

Answer 32

cranium

Question 33

cranium protects brain

Answer 33

cartilage

Question 34

lamprey introduces

Answer 34

vertebral column

Question 35

hagfish eyesight

Answer 35

blind

Question 36

hagfish have

Answer 36

low metabolic rates, jawless, sensory tentacles

Question 37

hagfish defense

Answer 37

slime and lot of extra skin

Question 38

lamprey characteristics

Answer 38

parastitic
small cerebellum
vertebral column
eyes
in great lakes

Question 39

lamprey life cycle

Answer 39

male and female make crescent shape and nest.
make larvae
larvae burrow themselves for 3-5 years and become adult lampreys
lamprey feed on fish
lamprey go upstream to reproduce