Chp.9

Question 1

Molluscan body plan consists of two major parts

Answer 1

head-foot and visceral mass

Question 2

Head-foot

Answer 2

Part of body that contains mouth with its sensory organs and a foot

Question 3

Dorsal visceral mass

Answer 3

contains other organ systems

Question 4

Mantle

Answer 4

tissue found in molluscs responsible for forming shell, locomotion and gas exchange

Question 5

Radula

Answer 5

Ribbon of tissue that contains teeth

Question 6

Chittons

Answer 6

Flattened body covered by eight shell plates

Question 7

Tusk Shells

Answer 7

Open shell with foot protruding from larger opening, water enters and exits through smaller opening bury themselves in sediments with foot

Question 8

Univalve

Answer 8

shell composed of a single piece

Question 9

Whorl

Answer 9

Turn of a gastropod shell around a central axis

Question 10

Aperature

Answer 10

Opening to gastropod shell

Question 11

operculum

Answer 11

Structure gastropods have for closing their aperature

Question 12

Bulb gland

Answer 12

gland located near the mouth of cone snails that produce venom

Question 13

Deposit feeders

Answer 13

animals that feed on organic material that mixes with mineral deposits

Question 14

Nudibranchs

Answer 14

Marine gastropods that lack a shell

Question 15

Cerata

Answer 15

prjections found on nudibranchs that increase the surface area available for gas exchnge

Question 16

Bivalves

Answer 16

Molluscs that have two hinged shells covering their body

Question 17

Umbo

Answer 17

Area around hinge, oldest part of shell

Question 18

Adductor muscles

Answer 18

Closes the two valves of molluscs, wen relaxed they open

Question 19

Palps

Answer 19

structure near bivalves mouth that form food mass and move to mouth

Question 20

Byssal Thread

Answer 20

tough threads composed of protein (how Mussels attach)

Question 21

Cephalopods

Answer 21

octopus and squid (“head”“footed”) foot modified into head like structure

Question 22

Siphuncle

Answer 22

cord tissue that runs through the chambers of a nautiloid and removes seawater from new chambers as they form

Question 23

Chromatophores

Answer 23

pigment containing cells that function in color changes (Cephalopods)

Question 24

Spermatophore

Answer 24

package of sperm

Question 25

Oviduct

Answer 25

tube that carries eggs to outside of body

Question 26

Supporting an animals body using fluid contained in the body

Answer 26

Hydrostatic skeleton

Question 27

Small bristles in the skin of some annelids

Answer 27

Setae; locomotion, digging, anchorage and defense

Question 28

Polychaetes that are active movers

Answer 28

Errant Polychaetes

Question 29

Sessile polychaetes

Answer 29

Sedentry Polychaetes

Question 30

Animals that ingest both organic and mineral particles and then digest organic material

Answer 30

Nonselective deposit feeders

Question 31

masses of organic material and mineral particles that are defecated by deposit feeders

Answer 31

Casting or fecal casts

Question 32

Animals that seperate organic material from minerals and then ingest only the organic material

Answer 32

Selective Deposit Feeders

Question 33

Type of reproduction in some polychaetes that involves the production of a reproductive individual that is adapted for a free swimming existance

Answer 33

Epitoky

Question 34

Behaviour that bring sexually mature individuals together

Answer 34

Swarming

Question 35

Chemical releases by female epitokes that stimulate males to shed sperm

Answer 35

Fertilizin

Question 36

solitary nonsegmented worms

Answer 36

Sipunculids

Question 37

animals with jointed appendages

Answer 37

Arthropods

Question 38

hard exterior skeleton

Answer 38

Exoskeleton

Question 39

Tough polysacharide found in the exoskeltons of Arthropods

Answer 39

Chitin

Question 40

Process where Arthropods shed old exoskeleton and form a new one

Answer 40

Molting

Question 41

Appendages found in Chelicerates that are modified for feeding

Answer 41

Chelicera

Question 42

Body region composed of a fused head and thorax

Answer 42

Cephalothorax

Question 43

body region of an animal that corresponds to the belly

Answer 43

Abdomen

Question 44

Long spike used by horseshoe crab for steering and defense

Answer 44

Telson

Question 45

Sensory sstructures of arthropods

Answer 45

Palps

Question 46

Arthropods that have appendages called mandibles fro chewing food

Answer 46

Mandibulates

Question 47

Arthropod appendages modified for swimming

Answer 47

Swimmerets

Question 48

Claws are

Answer 48

Chelipeds

Question 49

Anterior pair of appendages in male decapods which are adapted for delivering spermatophores to females

Answer 49

Copulatory pleopods

Question 50

Planktonic larval stage of some crabs and mantis shrimp

Answer 50

Zoea

Question 51

Planktonic larval stage of some shrimp and barnacles

Answer 51

Nauplius

Question 52

Bioluminescent organs found in krill

Answer 52

Photophores

Question 53

large masses or krill

Answer 53

Swarms

Question 54

Special appendages found in amphipods that are used for feeding

Answer 54

Gnathopods

Question 55

Feathery appendages found in barnacles that function in feeding

Answer 55

Cirripeds

Question 56

Structures on the heads of arrow worms used to catch prey

Answer 56

Grasping spines

Question 57

INternal skeleton

Answer 57

Endoskeleton

Question 58

Plates of calcium carbonate that make up enchinoderm endoskeleton

Answer 58

Ossicles

Question 59

pincher like structures found on skin of echinoderms

Answer 59

Pedicellariae

Question 60

System of tubes found in echinoderms that circulate water through body and functions in locomotion, feeding, gas exchange and excretion

Answer 60

Water vascular system

Question 61

Site at which water enters the water vascular system of echinoderms

Answer 61

madreporite

Question 62

Tube feet

Answer 62

Podia

Question 63

Side opposite the mouth in an echinoderm

Answer 63

Aboral surface

Question 64

To cast off a body part in defense (sea stars)

Answer 64

Autotomize

Question 65

Hard endoskeleton of an echinoid echinoderms

Answer 65

Test