Quiz 5 - Molluscs

Question 1

rasping structure around in the oral cavity of nearly all molluscs. Absent in bivalves.

Answer 1

radula

Question 2

different classes of phylum molluscs (5)

Answer 2

polyplacophora, gastropoda, Scaphopoda, bivalvia, cephalopoda

Question 3

example of phylum molluscs class polyplacophora

Answer 3

chitons

Question 4

example of class phylum molluscs Gastropoda

Answer 4

snail and slugs

Question 5

subclasses of Gastropoda

Answer 5

Prosobranchia, Opisthobranchia, Pulmonata

Question 6

examples of phylum molluscs class Gastropoda subclass Prosobranchia

Answer 6

shelled aquatic snails

Question 7

examples of phylum molluscs class Gastropoda subclass Opisthobranchia

Answer 7

sea hares and most nudibranchs (slugs)

Question 8

examples of phylum molluscs class Gastropoda subclass pulmonata

Answer 8

land snails and slugs

Question 9

examples of phylum molluscs class Scaphopoda

Answer 9

tusk/tooth shells

Question 10

examples of phylum molluscs class bivalvia

Answer 10

clams, oysters, scallops, etc.

Question 11

examples of phylum molluscs class Cephalopoda

Answer 11

octopus, squid, cuttlefish, and nautilus

Question 12

another name for gills

Answer 12

ctenidia

Question 13

surrounded on either side of the chiton foot, contains ctenidia

Answer 13

pallial groove on chiton

Question 14

largest class of molluscs

Answer 14

Gastropoda

Question 15

conspicuous opening of the Gastropoda shell

Answer 15

aperture

Question 16

ancestral condition of coiling in gastropods, single plane coiling

Answer 16

planispiral

Question 17

gastropoda shell coiling in a spiral in three dimensions, allows for gastropods to achieve larger sizes because weight could be shifted off the snails back and less danger of tipping over

Answer 17

conispiral

Question 18

left-handed gastropoda shells

Answer 18

sinistral

Question 19

right-handed gastropoda shells

Answer 19

dextral

Question 20

predators tend to prefer what kind of shell handedness

Answer 20

right-handed

Question 21

this has the function of bringing in water and directing the flow of water over the ctenidia in gastropods

Answer 21

siphon

Question 22

what subclass has a hard covering that lies on over the aperture when a snail retracts into the shell and what’s its called

Answer 22

Prosobranchia

Operculum

Question 23

beautiful molluscs that swim gracefully

Answer 23

Opisthobranchia (sea hares and nudibranch)

Question 24

members of this mollusc class/subclass lost their ctenidia and have a vascular mantle section that acts as a lung.

Answer 24

Class gastropoda
Subclass Pulmonata

Question 25

molluscs with elongated, open ended shells that are produced

Answer 25

Class Scaphopoda

Question 26

Molluscs that are deposit feeders

Answer 26

Class Scaphopoda

Question 27

smallest part of a class bivalvia shell and the oldest

Answer 27

umbo

Question 28

umbo is dorsal/ventral?

Answer 28

Dorsal