Echinoderm Test

Question 1

Where are the light sensitive eyespots of a sea star located?

Answer 1

Small tentacles at the tip of each arm

Question 2

What joins the ossicles together on echinoderms?

Answer 2

CT and muscle fibers

Question 3

Gas exchange in a sea star takes place through which of the following two structures?

Answer 3

Tube feet, skin gills

Question 4

For what purposes do brittle stars use their arms?

Answer 4

Take food into their mouths, to crawl rapidly along the bottom

Question 5

How do brittle stars free themselves from predators?

Answer 5

Autonomy

Question 6

Organisms in the class Echinoidea contain these structures, which are sometimes poisonous for protection?

Answer 6

Spines

Question 7

5 toothed mouth called aristotles lantern is located in which organism?

Answer 7

Sea urchin

Question 8

What are the tentacles surrounding the mouth of a sea cucumber used for?

Answer 8

Feeding

Question 9

The test is the internal skeleton for which organism?

Answer 9

Sea urchin

Question 10

Which of these are the most highly mobile echinoderms?

Answer 10

Brittle or serpent stars

Question 11

Which echinoderm rolls up into a ball to travel in the ocean surge, and then opens up to feed?

Answer 11

Basket stars

Question 12

Sea cucumbers have the ability to spit out a portion of their intestines to distract predators, what’s this called?

Answer 12

Evisceration

Question 13

Podia is another name for

Answer 13

Tube feet

Question 14

Circulation of water through a sea star accomplishes what 3 things?

Answer 14

Movement, excretion of waste, gas exchange

Question 15

Asteroids feed on which of the following?

Answer 15

Bivalves

Question 16

Sea stars use what for movement?

Answer 16

Tube feet

Question 17

Sea stars use this system to circulate water through their bodies

Answer 17

Hydro vascular

Question 18

With what do sea stars pry open the shells of scallops, clams, mussels?

Answer 18

Tube feet

Question 19

Calcareous plates fused to form the skeleton of most Echinoderms are called?

Answer 19

Ossicles

Question 20

Where are tube feet housed?

Answer 20

Ambulacral grooves

Question 21

Small pitcher like structures of Echinoderms, used for collecting food, protection, and sometime camouflage

Answer 21

Pedicellariae

Question 22

Stone canal, ring canal, radial canal, all part of what body system of Echinoderms?

Answer 22

Hydro vascular

Question 23

Echinoderms have what type of skeleton

Answer 23

Internal

Question 24

Underside of sea star where the mouth is

Answer 24

Oral surface

Question 25

Feeding styles of Echinoderms

Answer 25

Filtering and suspension, predation, vegetarian

Question 26

Skeleton of Echinoderms composed of

Answer 26

Calcium carbonate

Question 27

Water enters hydro vascular system through what structure?

Answer 27

Madreporite

Question 28

Balloon like structures that control extension of tube feet of Echinoderms

Answer 28

Ampulla

Question 29

Body symmetry of adult Echinoderms

Answer 29

Pentamerous radial

Question 30

What type of symmetry do Echinoderms have during their larval stage?

Answer 30

Bilateral

Question 31

What body systems do Echinoderms not have?

Answer 31

Circulatory, respiratory, excretory

Question 32

Do Echinoderms have a nervous system?

Answer 32

Yes, but they have no head or brain

Question 33

What is the oral surface of Echinoderms?

Answer 33

Mouth located on this side

Question 34

What is aboral surface of Echinoderms?

Answer 34

Top of body

Question 35

Trace the movement of water through the water vascular system

Answer 35

Water enters through the madreporite, passes through stone canal to ring canal, enters radial canal, and connects to tube feet and ampulla

Question 36

Which Echinoderms are filter feeders?

Answer 36

Brittle stars, crinoids

Question 37

Which Echinoderms are grazers?

Answer 37

Sea urchin

Question 38

Which Echinoderms are detritavores?

Answer 38

Sea stars

Question 39

Which Echinoderms are predators?

Answer 39

Sea stars

Question 40

Which Echinoderms are suspension feeders?

Answer 40

Sea cucumber

Question 41

In Echinoderms where are eggs and sperm produced?

Answer 41

In the arms

Question 42

What are free swimming larva

Answer 42

Bipannaria

Question 43

What are the classes of Echinoderms?

Answer 43

- Holothuroidea - Crinoidea - Echinoidea - Ophiuroidea - Asteroidea

Question 44

What organisms are in the class Holothuroidea?

Answer 44

Sea cucumbers/ sea pig

Question 45

What organisms are in Crinoidea?

Answer 45

Sea lilies

Question 46

What organisms are in Echinoidea?

Answer 46

Sea urchins, sand dollars, sea biscuits

Question 47

What organisms are in Ophiuroidea?

Answer 47

Brittle stars

Question 48

What organisms are in Asteroidea?

Answer 48

Sea stars

Question 49

What is a sea cucumbers defense?

Answer 49

Ejects guys through the cloaca | Cloaca: opening used for reproduction and excretion

Question 50

How do sea cucumbers feed?

Answer 50

Sift through sand

Question 51

What type of feeders are sea lilies?

Answer 51

Filter feeders

Question 52

Characteristics of sea lilies?

Answer 52

Long feather like arms and short hook like legs called cirri | -upward facing mouths

Question 53

What do sea urchins feed on?

Answer 53

Algae

Question 54

What eats sea urchins?

Answer 54

Otters

Question 55

What is the test of the sea urchin?

Answer 55

Exoskeleton that houses internal organs

Question 56

How do brittle/basket stars feed?

Answer 56

Suspension/filter feeders | -produce mucus to catch food

Question 57

What do sea stars eat?

Answer 57

Oyster, clams, mussels

Question 58

How many stomachs do sea stars have?

Answer 58

2

Question 59

What are the 2 stomachs?

Answer 59

Cardiac and pyloric | -cardiac: everted out of organism to digest prey