Ch 33

Front 1

the yunnanozoans may be the _______ of the deuterostomes

Back 1

ancestors

Front 2

the ______ is the muscular structure at the front of the _________ tract. they may have ______

Back 2

pharynx; digestive; teeth

Front 3

pharyngeal slits are used to either trap ______ _______ or used as _____. they're found in chordate ______

Back 3

food particles; gills; embryos

Front 4

the three main groups of deuterostomes are _______, ______, and hemi______.

Back 4

echinoderms, chordates, hemichordates

Front 5

echinoderm larva is _______ symmetrical and adults can be _______ symmetrical

Back 5

bilaterally; pentaradial

Front 6

echinoderm larva have _______ arms

Back 6

ciliated

Front 7

examples of echinoderms?

Back 7

starfish, brittle stars, urchins, sea cucumbers, sand dollars, feather stars, sea lillies

Front 8

star fish have ____ feet that are used for ______ and ____ exchange

Back 8

tube, locomotion, gas

Front 9

tube feet have _____ and _____ muscles that are used for movement

Back 9

circular; longitudinal

Front 10

unlike sea stars, brittle stars have ______ arms composed of _____ ____ plates

Back 10

flexible; jointed, hard

Front 11

unlike most other echinoderms, brittle stars have ____ opening(s) to the _____ tract

Back 11

one; digestive

Front 12

sea urchins and sand dollars have a __ party body plan but no ____

Back 12

five; arms

Front 13

sea urchins' spines are attached to an underlying _______

Back 13

skeleton

Front 14

sea cucumbers have _____ _____ feet used to attach to a substrate and ______ ____ feet modified into _______ used to feed

Back 14

posterior tube;
anterior tube; tentacles

Front 15

on sea cucumbers the mouth is _____ and the anus is ______ (position on body)

Back 15

anterior; posterior

Front 16

acorn worms and pterobranchs have a three part body plan: ________, _______, and _____

Back 16

proboscis, collar, and trunk

Front 17

an acorn worm's proboscis is used for _____ and is coated with ______ to trap prey. _____ move the prey into the mouth.

Back 17

digging, mucus (sticky); cilia

Front 18

behind an acorn worm's mouth is a ________ which opens via _________ slits

Back 18

pharynx; pharyngeal

Front 19

pterbranchs are mobile, true or false?

Back 19

false - they're sedentary

Front 20

are humans chordates?

Back 20

yes

Front 21

an example of cephalochordates are lancelets, who ______ their notochord and use it for _______

Back 21

retain; burrowing

Front 22

lancelets extract prey from water with _________ basket

Back 22

pharyngeal

Front 23

an example of urochordates are ____ _____.

Back 23

sea squirts

Front 24

seq squirts are mobile or sessile?

Back 24

sessile

Front 25

vertebrates have a _______ _______ that replace the ______ during development

Back 25

vertebral column; notochord

Front 26

vertebrates have a rigid ____ ______ with vertebral column as an anchor

Back 26

internal skeleton

Front 27

how many pairs of appendages are attached to a vertebral column?

Back 27

two

Front 28

vertebrates skulls are ______ and their internal organs are ______

Back 28

anterior; suspended

Front 29

jawless fish evolved jaws from the ____ _____ supporting their gills

Back 29

skeletal arches

Front 30

after lungfish came ________ when enlargement of fin bones allowed for _____ _____

Back 30

amphibians; walking legs