Ch 9 Part 3 Test

Question 1

endoskeleton

Answer 1

skeleton made with tissue; spines covered by a thin layer of tissue

Question 2

water vascular system

Answer 2

unique to exoskeleton; hydraulic system that functions in locomotion, feeding, gas exchange, and excretion

Question 3

madreporite

Answer 3

1st part of water vascular system water enters through and then passes through a system of canals that run throughout the animal’s body

Question 4

tube feet

Answer 4

2nd part of the water vascular system; extensions and extend

Question 5

ampullae

Answer 5

3rd part of the water vascular system; muscular sacs, opposite tube feet inside the organism.

Question 6

seastars phylum and class

Answer 6

encindermata; class Asteroidea

Question 7

ambulacral grooves

Answer 7

several hundred tube feet on their oral surface protruding from channels on each arm

Question 8

duocells

Answer 8

cells that secrete a sticky adhesive. The same cells then can produce a substance that will dissolve the adhesive

Question 9

seastars endoskeleton

Answer 9

CaCO3 interconnected plates; flexible

Question 10

pedicellariae

Answer 10

pincer like structures on aboral surface; keeps it clean

Question 11

seastar feeding behavior

Answer 11

carnivore; eat bivalves by pulling its shell apart and then extruding its stomach out into the shell digesting the bivalve internally; some are scavengers

Question 12

where are seastars found

Answer 12

rocky intertidal zones, coral reefs, attached to surfaces

Question 13

brittle stars phylum and class

Answer 13

encindermata; ophiuroidea

Question 14

ossicles

Answer 14

found in brittle stars; skeletal plates that aid in flexibility

Question 15

brittle stars feeding behavior

Answer 15

deposit and suspension feeders

Question 16

where are brittle stars found?

Answer 16

rocky intertidal, reefs, and mud/sand

Question 17

sea urchin and sand dollar phylum and class

Answer 17

encindermata; echinoidea

Question 18

sea urchin and sand dollar characteristics

Answer 18

endoskeleton forms a round rigid test with moveable spines and pedicellariae

Question 19

how do sea urchins and sand dollars move?

Answer 19

by spines and tube feet

Question 20

sea urchin feeding behavior

Answer 20

have big appetites and graze on algae and seaweed. They wipe out large kelp beds when they have population explosions

Question 21

Aristotle’s Lantern

Answer 21

sea urchins’s jaws and teeth used to bite algae

Question 22

Where are sea urchins found

Answer 22

rocky intertidal, kelp beds, some in coral reefs

Question 23

sand dollars and heart urchins feeding behavior

Answer 23

deposit or suspension feeders; uses tube feet to get food particles out of water column and into mouth

Question 24

where are sand dollars and heart urchins found?

Answer 24

sandy bottoms

Question 25

sea cucumbers phylum and class

Answer 25

encindermata; holothuroidea

Question 26

sea cucumbers symmetry

Answer 26

lack radial symmetry

Question 27

sea cucumber endoskeleton

Answer 27

microscopic, calcareous spicules

Question 28

sea cucumber respiration

Answer 28

have respiratory trees which branch from the aboral region and exchange gases with water

Question 29

sea cucumber defensive mechanism

Answer 29

some can secrete toxins and all can eject their intestines

Question 30

cuvierian tubes

Answer 30

branch from the base of respitory trees; they inflate

Question 31

evisceration

Answer 31

ejects its intestines out of their mouth and predator feeds on those while sea cucumber crawls away

Question 32

crinoids examples

Answer 32

feather stars and sea lilies

Question 33

crinoids phylum and class

Answer 33

encindermata; crinoidea

Question 34

crinoids feeding behavior

Answer 34

suspension feeders: use tube feet to snap food particles

Question 35

where are feather stars found

Answer 35

shallow to deep bottom; nocturnal - crawl around hard surfaces only during the night in search of food

Question 36

where are sea lilies found

Answer 36

deep water; sessile

Question 37

automize

Answer 37

brittle stars can cast off limbs like lizards

Question 38

What defines a chordate?

Answer 38

1. nerve cord 2. gill slits 3. notochord 4. sometimes a tail

Question 39

Tunicates phylum and subphylum

Answer 39

chordata; urochordata

Question 40

Tunicates examples

Answer 40

sea squirts and salps

Question 41

tunicates are found

Answer 41

attatched to substrates

Question 42

feeding behavior of tunicates

Answer 42

filter feeders with incurrent and excurrent siphon

Question 43

Why are tunicates in the phylum chordata

Answer 43

As larva they have a notochord and nerve cord which is later absorbed as an adult called retroagressive metaorphisis

Question 44

Lancelets phylum and subphylum

Answer 44

chordata; cephalochordata

Question 45

why aren't lancelets considered fish?

Answer 45

lack a backbone

Question 46

Where are lancelets found?

Answer 46

buried in sand

Question 47

lancelets feeding behavior

Answer 47

filter feeders using gill slits to filter

Question 48

nerve cord

Answer 48

a dorsal hollow nereve cord

Question 49

gill slits

Answer 49

small openings along the anterior of the gut

Question 50

notochord

Answer 50

flexible rod for support