Phylum Mollusca

Question 1

Class Polyplacophora

Answer 1

chitons

Question 2

Class Scaphopoda

Answer 2

tusk or tooth shells

Question 3

Class Gastropoda

Answer 3

single shell snails, limpets, nudibranchs

Question 4

C. Gastropoda, Subclass Prosobranchia

Answer 4

limpets, perriwinkles, whelks, sea snails

Question 5

C. Gastropoda, Subclass Opistobranchia

Answer 5

nudibranchs - 2 groups

Question 6

C Gastropoda, SC Opistobranchia, Group Aeolids

Answer 6

oral tentacles, have cerata

Question 7

C Gastropoda, SC Opistobranchia, Group Dorids

Answer 7

bumpy surface, gills in ring on back

Question 8

Class Bivalvia

Answer 8

mussels, clams, scallops, oysters, shipworms

Question 9

Class Cephalopoda

Answer 9

chambered nautilus, cuttlefish, squid, octopus, squid

Question 10

C. Cephalopoda, Subclass Nautilodea

Answer 10

chambered nautilus

Question 11

C. Cephalopoda, Subclass Coleoidea

Answer 11

cuttlefish, squid, octopus

Question 12

C. Cephalopoda, Subclass Coleoidea, Order Teuthoidea

Answer 12

squid

Question 13

C. Cephalopoda, Subclass Coleoidea, Order Vampyromorpha

Answer 13

vampire squid

Question 14

C. Cephalopoda, Subclass Coleoidea, Order Sepiida

Answer 14

cuttlefish

Question 15

C. Cephalopoda, Subclass Coleoidea, Order Octopoda - two subclasses

Answer 15

octopus: Subclass Cirrina and Incirrina

Question 16

mantle

Answer 16

cavity that secretes shell, provides protection, and allows for jet propulsion

Question 17

foot

Answer 17

used for locomotion and attachment

Question 18

radula

Answer 18

rows of backward teeth used to scrape

Question 19

sessile movement in molluscs

Answer 19

use byssal threads for attachment

Question 20

motile movement in molluscs

Answer 20

have muscles, use siphon

Question 21

siphon

Answer 21

modified foot for jet propulsion

Question 22

filter feeding

Answer 22

use siphon

Question 23

predatory feeding

Answer 23

use powerful beak

Question 24

rhinophores

Answer 24

used for sensing in nudibranchs

Question 25

defining trait of aeolids

Answer 25

have 2 oral tentacles and finger-like gills

Question 26

defining trait or dorids

Answer 26

bumpy skin, gills in a ring-like shape

Question 27

what is special about the bivalve shell

Answer 27

two-part shell with extremely strong adductor muscle to keep shell closed

Question 28

how do bivalves feed

Answer 28

filter feeders - two parts

Question 29

what are the two parts of a bivalves feeding system?

Answer 29

excurrent and incurrent siphons

Question 30

how is the cephalopod foot modified

Answer 30

with tentacles

Question 31

how do cephalopods move

Answer 31

a muscular contraction of the mantle, allowing for jet propulsion

Question 32

how to cephalopods feed

Answer 32

they have a long tentacle with suckers

Question 33

how does cephalopod color change occur (hint: two parts - chromatophores and iridiocytes)

Answer 33

the chromatophores create numerous pigments, in which the iridiocytes reflect off of; so when the skin muscles contract, they change color

Question 34

inc sac

Answer 34

used for defense/escape

Question 35

siphuncle (key trait of the nautilus shell)

Answer 35

helps with buoyancy

Question 36

what type of sucker does a squid have

Answer 36

horny rims

Question 37

pen

Answer 37

adapted shell - internal for support

Question 38

what type of a sucker does a vampire squid have

Answer 38

none