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Zoology > Echinoderms > Flashcards

Echinoderms Flashcards

1
Q

“echino” means _________

A

spiny

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2
Q

Phylum Echinodermata is Bilaterally Symmetrical. (true or false)

A

False. Pentaradial Symmetry

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3
Q

“dermata” means ________

A

skin

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4
Q

are echinoderms diploblastic or triploblastic?

A

triploblastic

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5
Q

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

A

water-vascular cavity

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6
Q

tube feet allows the echinoderms to move and _________

A

transfer oxygen

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7
Q

what comes first? mouth or the anus?

A

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

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8
Q

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

A

ossicles

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9
Q

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

A

Pedicellarias

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10
Q

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

A

false. oral not aboral

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11
Q

it is the opposite end of the suction cup.

A

ampulla

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12
Q

corresponds to the bulb and the eyedropper.

A

ampulla

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13
Q

disk-shaped opening in echinoderms body.

A

madreporite

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14
Q

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

A

true

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15
Q

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

A

false. most echino have no ability to osmoregulate

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16
Q

what is the abundant species found in the Philippine trench?

A

sea cucumber

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17
Q

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

A

false. all oceans at all depths

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18
Q

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

A

false. echinoderms are free living

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19
Q

4 classes of echinodermata and their common names

A

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

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20
Q

The prima donnas are predators (true or false)

A

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

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21
Q

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

A

false. it is found in the aboral surface

22
Q

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

A

Pyloric Caeca

23
Q

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

A

Pentagonal Pyloric Stomach

24
Q

Class Asteroidea is monoecious (true or false)

A

false. dioecious

25
Q

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

A

false. asteroidea has paired gonads

26
Q

the fertilization of Asteroidea occurs internally or externally?

A

externally. asteroidea’s reproduction is an external fertilization

27
Q

What class is the most agile echinoderm?

A

Ophiuroidea

28
Q

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

A

true

29
Q

ophiuroidea has _____, ______, and ______ plates.

A

aboral, lateral, oral

30
Q

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

A

false. bursal slit is for respiration

31
Q

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

A

false. 5 triangular jaws

32
Q

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

A

echinoidea

33
Q

common name of echinoidea

A

sea urchin

34
Q

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

A

true.

35
Q

what holds the spine erect in sea urchins?

A

cog muscles

36
Q

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

A

false. only from the 5 ambulacral region

37
Q

class echinoidea has a flagellated epidermis (true or false)

A

false. ciliated.

38
Q

what is the largest among the class’ genital plate?

A

madreporite plate

39
Q

what are the unique features of class ophiuroidea

A
  • aristotles lantern
  • madreporite plate
  • ciliated epidermis
  • iterlocked ossicles
40
Q

class holothuroidea has an _______ body.

A

elongated

41
Q

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

A

false. mouth and anus are located at opposite poles.

42
Q

sea cucumbers have tentacles (true or false)

A

true.

43
Q

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

A

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

44
Q

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

A

true.

45
Q

functions of respiratory trees in class holothuroidea

A

respiratory and excretory

46
Q

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

A

Polian Vesicles

47
Q

class holothuroidea are dioecious (true or false)

A

true.

48
Q

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

A

false. class Holothuroidea performs external fertilization as well

49
Q

what class folds itself around the food?

A

asteroidea

50
Q

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

A

false. no recorded parasitism, but some are commensalistic

Zoology (1 decks)

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