Echinoderms

Question 1

“echino” means _________

Answer 1

spiny

Question 2

Phylum Echinodermata is Bilaterally Symmetrical. (true or false)

Answer 2

False. Pentaradial Symmetry

Question 3

“dermata” means ________

Answer 3

skin

Question 4

are echinoderms diploblastic or triploblastic?

Answer 4

triploblastic

Question 5

what is the cavity for echinoderms that is responsible with feeding, respiration, and movement?

Answer 5

water-vascular cavity

Question 6

tube feet allows the echinoderms to move and _________

Answer 6

transfer oxygen

Question 7

what comes first? mouth or the anus?

Answer 7

the first opening (blastopore) becomes anus and the mouth is formed later from another opening.

Question 8

what is the endoskeleton made up of large plates or small scattered ______?

Answer 8

ossicles

Question 9

serves as the protection for the phylum. it is the spines in starfish and sea urchins

Answer 9

Pedicellarias

Question 10

tube feet is for locomotion, gas exchange, and excretion on the aboral side. (true or false)

Answer 10

false. oral not aboral

Question 11

it is the opposite end of the suction cup.

Answer 11

ampulla

Question 12

corresponds to the bulb and the eyedropper.

Answer 12

ampulla

Question 13

disk-shaped opening in echinoderms body.

Answer 13

madreporite

Question 14

madreporite controls the water pressure in the echinoderm’s body . (true or false)

Answer 14

true

Question 15

most echinoderms have the ability to osmoregulate (true or false)

Answer 15

false. most echino have no ability to osmoregulate

Question 16

what is the abundant species found in the Philippine trench?

Answer 16

sea cucumber

Question 17

echinoderms occur in all oceans, in shallow parts of the sea (true or false)

Answer 17

false. all oceans at all depths

Question 18

echinoderms are sessile and not free living (true or false)

Answer 18

false. echinoderms are free living

Question 19

4 classes of echinodermata and their common names

Answer 19

Asteroidea - Sea Stars
Ophiuroidea - Brittle Stars
Echinoidea - Sea Urchins
Holothuroidea - Sea Cucumber

Question 20

The prima donnas are predators (true or false)

Answer 20

True. sea stars are particle feeders and predate in slow-moving prey

Question 21

The madreporite plate of the class asteroidea is found in the oral surface (true or false)

Answer 21

false. it is found in the aboral surface

Question 22

what helps in the asteroidea’s digestion and secrete enzymes?

Answer 22

Pyloric Caeca

Question 23

what connects the stomach and the duodenum of the class asteroidea?

Answer 23

Pentagonal Pyloric Stomach

Question 24

Class Asteroidea is monoecious (true or false)

Answer 24

false. dioecious

Question 25

the class Asteroidea has a unique reproductive trait and only has one gonad (true or false)

Answer 25

false. asteroidea has paired gonads

Question 26

the fertilization of Asteroidea occurs internally or externally?

Answer 26

externally. asteroidea’s reproduction is an external fertilization

Question 27

What class is the most agile echinoderm?

Answer 27

Ophiuroidea

Question 28

Class ophiuroidea is an active predator and selective deposit feeders (true or false)

Answer 28

true

Question 29

ophiuroidea has _____, ______, and ______ plates.

Answer 29

aboral, lateral, oral

Question 30

the bursal slit in class ophiuroidea serves as the mouth for eating (true or false)

Answer 30

false. bursal slit is for respiration

Question 31

Ophiuroids have 3 triangular jaws and 2 tube feet for feeding and locomotion (true or false)

Answer 31

false. 5 triangular jaws

Question 32

what is the class of echinoderm that has a globose shell?

Answer 32

echinoidea

Question 33

common name of echinoidea

Answer 33

sea urchin

Question 34

sea urchins have movable spines but don’t have any arms (true or false)

Answer 34

true.

Question 35

what holds the spine erect in sea urchins?

Answer 35

cog muscles

Question 36

tube feet of sea urchins originated from the madreporite and its ambulacral region (true or false)

Answer 36

false. only from the 5 ambulacral region

Question 37

class echinoidea has a flagellated epidermis (true or false)

Answer 37

false. ciliated.

Question 38

what is the largest among the class’ genital plate?

Answer 38

madreporite plate

Question 39

what are the unique features of class ophiuroidea

Answer 39

- aristotles lantern - madreporite plate - ciliated epidermis - iterlocked ossicles

Question 40

class holothuroidea has an _______ body.

Answer 40

elongated

Question 41

the mouth and anus of the sea cucumbers are found in one area (true or false)

Answer 41

false. mouth and anus are located at opposite poles.

Question 42

sea cucumbers have tentacles (true or false)

Answer 42

true.

Question 43

the pharynx of holothuroidea is supported by 7 rings of calcacerous plates (true or false)

Answer 43

false. i want it i got it yarn? only 1 ring hehe

Question 44

the expansion of stomach of sea cucumbers form cloaca (true or false)

Answer 44

true.

Question 45

functions of respiratory trees in class holothuroidea

Answer 45

respiratory and excretory

Question 46

what maintains the pressure in the water vascular system of the class holothuroidea?

Answer 46

Polian Vesicles

Question 47

class holothuroidea are dioecious (true or false)

Answer 47

true.

Question 48

the only class of echinoderms that has an internal fertilization is the class holothuroidea (true or false)

Answer 48

false. class Holothuroidea performs external fertilization as well

Question 49

what class folds itself around the food?

Answer 49

asteroidea

Question 50

echinodermata is mostly parasitic of the coral reeves (true or false)

Answer 50

false. no recorded parasitism, but some are commensalistic