Lab 10 - Echinodermata

Question 1

Echinodermata are _____stomes

Answer 1

deuterostomes

Question 2

deuterostomes (3)

Answer 2

blastopore becomes the anus, being enterocoelous, and having radial/intermediate cleavage

Question 3

what feature has Echinodermata re-evolved?

Answer 3

radial symmetry (pentaradial)

Question 4

another unique feature of echinoderms is the _____ vascular system

Answer 4

water

Question 5

the water vascular system evolved from part of the _____

Answer 5

coelom

Question 6

water vascular system

Answer 6

uses seawater or coelomic fluid to generate hydraulic pressure to operate tube feet

Question 7

what structure do Echinoderms uses for locomotion and prey capture?

Answer 7

tube feet

Question 8

echinoderms live in exclusively _____ environment

Answer 8

marine

Question 9

members of Echinodermata have an _____skeleton

Answer 9

endo

Question 10

what is the skeleton of Echinoderms made from?

Answer 10

calcareous ossicles

Question 11

oral surface

Answer 11

where the mouth is

Question 12

aboral surface

Answer 12

opposite with the mouth and usually with an anus

Question 13

larvae in Phylum Echinodermata are all this kind of symmetry

Answer 13

bilateral

Question 14

autotomy

Answer 14

the ability to deliberately shed parts of their own body

Question 15

Class Crinoidea

Answer 15

sea lilies

Question 16

what distinguishes members of Class Crinoidea from the others? (2)

Answer 16

• a mouth that faces upward
• water vascular system uses coelomic fluid instead of seawater

Question 17

where are the tube feet of Crinoids located? (2)

Answer 17

• calyx
• oral side

Question 18

Members of Class Crinoidea are what kinds of feeders?

Answer 18

filter feeders

Question 19

What are the feeding structures of Class Crinoidea called

Answer 19

cirri

Question 20

Class Ophiuroidea has these two types of animals (2)

Answer 20

• brittle stars
• basket stars

Question 21

what makes members of Class Ophiuroidea unique?

Answer 21

they have an incomplete gut

Question 22

Class Ophiuroidea have no _____ groove on the arms

Answer 22

ambulacral

Question 23

How do brittle/basket stars (Class Ophiuroidea) move?

Answer 23

they use their entire slender arms instead of just their tube feet

Question 24

Class Ophiuroidea have shields which are…

Answer 24

protective ossicles

Question 25

Class Echinoidea has what types of animals? (3)

Answer 25

- sea urchins - sand dollars - sea biscuits

Question 26

What do members of Class Echinoidea use for protection and support?

Answer 26

calcareous spines

Question 27

test

Answer 27

a collection of fused calcareous endoskeletal plates called ossicles

Question 28

what is the jaw-like structure found on Class Echinoidea used for feeding?

Answer 28

Aristotle's lantern

Question 29

what are the tiny pincer-like ossicles found on the surface of members of Classes Echinoidea and Asteroidea?

Answer 29

pedicellariae

Question 30

pedicellariae function (2)

Answer 30

- cleaning the surface of the body of debris - in defense (many discharge toxin)

Question 31

Class Asteroidea contain what kind of animal?

Answer 31

sea stars

Question 32

what kind of eaters are members of Class Asteroidea?

Answer 32

carnivores

Question 33

How do the arms and central disc of Asteroidea differ from those of Ophiuroidea?

Answer 33

The central disc of Asteroidea bears a madreporite on the aboral surface, while Ophiuroidea have the madreporite on the oral surface of the central disc

Question 34

What role(s) does the madreporite play in the water vascular system of Asteroidea? (3)

Answer 34

- pressure regulator - serves as a filter to keep out foreign particles - serves as an entrance for seawater in the water vascular system

Question 35

what method of food acquisition odes Holothuroidea employ?

Answer 35

filter/deposit feeding

Question 36

Class Holothuroidea contains what kind of animals?

Answer 36

sea cucumbers

Question 37

Class Holothuroidea exhibit what kind of symmetry?

Answer 37

bilateral; they are elongated along the oral/aboral axis

Question 38

feeding tentacles

Answer 38

in members of Holothuroidea, they are modified ring of tube feet near the mouth

Question 39

members of Class Holothuroidea use what structure for respiration?

Answer 39

respiratory tree that branches off their anus

Question 40

cuvierian tubules

Answer 40

in members of Holothuroidea, they are offshoots of the respiratory tree shot through their anus to confuse predators

Question 41

Because Holothuroidea have lost the sharp spines and hard endoskeleton most Echinoderms rely on for protection, how do they defend themselves?

Answer 41

if threatened excessively, they may eviscerate their internal organs

Question 42

what class of Echinodermata has a rigid exoskeleton composed of ossicles called plates?

Answer 42

Echinoidea

Question 43

Which class does NOT use tube feet for locomotion?

Answer 43

Ophiuroidea

Question 44

what is a unique feature to Holothuroidea?

Answer 44

respiratory tree

Question 45

name these specimen

Answer 45

Phylum Echinodermata Class Asteroidea

Question 46

name these specimen

Answer 46

Phylum Echinodermata Class Asteroidea

Question 47

name this specimen

Answer 47

Phylum Echinodermata Class Holothuroidea

Question 48

name this specimen

Answer 48

Phylum Echinodermata Class Holothuroidea

Question 49

name these specimen

Answer 49

Phylum Echinodermata Class Crinoidea

Question 50

name these specimen

Answer 50

Phylum Echinodermata Class Crinoidea

Question 51

name these specimen

Answer 51

Phylum Echinodermata Class Ophiuroidea

Question 52

name these specimen

Answer 52

Phylum Echinodermata Class Ophiuroidea

Question 53

name these specimen

Answer 53

Phylum Echinodermata Class Ophiuroidea

Question 54

name these specimen

Answer 54

Phylum Echinodermata Class Ophiuroidea

Question 55

name these specimen

Answer 55

Phylum Echinodermata Class Ophiuroidea

Question 56

name these specimen

Answer 56

Phylum Echinodermata Class Ophiuroidea

Question 57

name these specimen

Answer 57

Phylum Echinodermata Class Echinoidea

Question 58

name these specimen

Answer 58

Phylum Echinodermata Class Echinoidea

Question 59

name these specimen

Answer 59

Phylum Echinodermata Class Echinoidea

Question 60

name these spceimen

Answer 60

Phylum Echinodermata Class Echinoidea