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Biology, 6/e
Author Dr. George B. Johnson, Washington University
Author Dr. Peter H. Raven, Missouri Botanical Gardens & Washington University
Contributor Dr. Susan Singer, Carleton College
Contributor Dr. Jonathan Losos, Washington University
Echinoderms

Multiple Choice Quiz

Please answer all questions



1

The echinoderm development type is
A)terminal
B)indeterminate
C)indefinite
D)determinate
2

An evolutionary advance that first appeared in echinoderms was
A)radial symmetry
B)one-way digestive system
C)external digestion
D)endoskeleton
3

The functions of waste removal and respiration are combined in the sea star's
A)tube feet
B)madreporite
C)papulae
D)pedicellariae
4

Breaking in half and regenerating the other half is actually a reproductive mechanism of some members of the class
A)Echinoidea
B)Ophiuroidea
C)Holothuroidea
D)Asteroidea
5

Swimming is a locomotion mechanism for some
A)brittle stars
B)sea urchins
C)sea cucumbers
D)sand dollars
6

The protostome embryos have a _______________ form of cleavage.
A)bilateral
B)spiral
C)elliptical
D)radial
E)centric
7

In echinoderms, water enters the water vascular system through the
A)ring canal
B)radial canals
C)ampulae
D)madreporite
E)skin gills
8

Sea cucumbers feed by
A)scraping algae from surfaces
B)capturing organisms with their tube feet
C)evagination of the stomach
D)trapping small organisms in mucous
E)ingesting plankton into their water vascular system
9

The deuterostome coelom forms from
A)invagination of the blastopore
B)evagination of the archenteron
C)folding of the endoderm
D)invagination of the archenteron
E)evagination of the blastopore
10

The "spiny skin" for which echinoderms are named refers to the
A)extended skin gills
B)protruding tube feet
C)rigid tentacles
D)chitinous exoskeleton
E)calcium-rich endoskeleton
11

The only living echinoderms that are fully sessile are the
A)sea lilies
B)brittle stars
C)feather stars
D)sand dollars
E)sea cucumbers
12

Water entering a starfish through the madreporite passes first into the
A)ring canal
B)ampulae
C)stone canal
D)ossicles
E)radial canal
13

All living species of sea lilies live at depths of
A)0 to 10 meters
B)about 30 meters
C)more than 100 meters
D)more than 10,000 meters
E)50 to 100 meters
14

Around the base of sea star spines are minute _______________ with tiny jaws.
A)tube feet
B)skin gills
C)ossicles
D)pedicellariae
E)tentacles
15

Some sea stars digest bivalve mollusks
A)in the mouth region
B)in the mollusk shell
C)within their gastrovascular cavity
D)in a digestive space in the central disk
E)in their water vascular system
16

The _______________ comprise the largest class of echinoderms in terms of numbers.
A)brittle stars
B)sand dollars
C)sea urchins
D)sea lilies
E)sea stars
17

The cleavage pattern of deuterostome embryos is
A)bilateral
B)spiral
C)elliptical
D)radial
E)centric
18

The _______________ differ from all other living echinoderms in that their mouth and anus are on the upper surface in an open disk.
A)sea urchins
B)sea stars
C)brittle stars
D)sea cucumbers
E)crinoids
19

The _______________ have an extensive internal branching respiratory tree arising from the cloaca.
A)sea cucumbers
B)sea stars
C)sea urchins
D)sea daises
E)feather stars
20

The most recently described echinoderms are the
A)feather stars
B)sea cucumbers
C)sea urchins
D)sea lilies
E)sea daises
21

The living echinoderm that most resembles the ancestral form is the
A)sand dollar
B)sea star
C)brittle star
D)sea urchin
E)sea lily
22

Sea urchins move about by
A)tentacles
B)flexible arms
C)movable spines
D)small pinchers
E)extruding slime
23

Most reproduction in echinoderms is
A)sexual and external
B)hermaphroditic
C)asexual by fragmentation
D)parthenogenic
E)sexual and internal
24

Which of the following is not descriptive of deuterostomes?
A)embryo divides by radial cleavage
B)larva is a trochophore
C)anus develops from the blastopore
D)generally show regulative development
E)includes echinoderms and chordates
25

Echinoderms are most closely related to:
A)roundworms
B)mollusks
C)annelids
D)arthropods
E)chordates
26

Early embryonic development of echinoderms is similar to that found in
A)gastropods
B)arthropods
C)cephalpods
D)humans
E)other protostomes
27

Which of the following is not an echinoderm?
A)sea urchin
B)sea star
C)earthworm
D)sea cucumber
E)acorn worm
28

Which of the following is not characteristic of the sea stars?
A)water vascular system
B)central disk with five or more arms
C)notochord
D)spiny skeleton
E)tube feet
29

Which of the following are not correctly matched?
A)sea cucumber-have reduced and separated endoskeletons, making them soft bodied
B)sea stars-active predators that are able to move about using their tube feet
C)brittle stars-use their tube feet for feeding and move about using two arms
D)sea daisies-disc-shaped bodies that lack tube feet
E)sea lilies-are primarily sessile and have mouth and anus on upper surface
30

Which of the following features are unique to echinoderms?
A)They are bilaterally symmetrical as larvae, but undergo metamorphosis to radial adults.
B)They possess an endoskeleton of dermal plates beneath the skin.
C)The coelom is transformed into a unique water-vascular system that uses hydraulic power to operate many tiny feet.
D)They exhibit protostomal growth pattern.
E)all above are unique features to echinoderms
31

Echinoderms use muscles attached to an exoskeleton to move.
A)True
B)False
32

The echinoderms exhibit radial symmetry and are therefore more closely related to cnindarins than to the bilateral symmetrical animal phyla.
A)True
B)False
33

Sea stars are among the most important predators in the marine ecosystems.
A)True
B)False








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