Molluscs

Question 1

unique amongst molluscs, except in bivalves, tiny teeth up to 250,000

Answer 1

radula

Question 2

Mollusca are mostly ______ some are hermaphroditic

Answer 2

dioecious

Question 3

egg hatches and produces a ______ trochophore larva

Answer 3

free-swimming

Question 4

larva undergoes ______ __________ into a small juvenile as in chitons, which is ancestral for most molluscs

Answer 4

direct metamorphosis

Question 5

In many gastropods and bivalves, a uniquely molluscan
intermediate larval stage, the _____, is hatched with the
beginnings of a foot, shell, and mantle

Answer 5

veliger

Question 6

true or false
cephalopods, some freshwater bivalves, and snails have no free swimming larvae and only juveniles hatch directly from eggs

Answer 6

true

Question 7

Class of Chitons or Katharina sp

Answer 7

Class Polyplacophora

Question 8

Chitons are flattened ______ with a convex dorsal surface

Answer 8

dorsoventrally

Question 9

chitons have _____ articulating limy plates

Answer 9

7 or 8

Question 10

most diverse class of mollusca

Answer 10

class gastropoda

Question 11

Shells of gastropods are
a. one piece
b. two piece

Answer 11

a. one piece univalve, coiled or uncoiled

Question 12

_____ is smallest and oldest part of whorl
a. apex
b. spine
c. operculum

Answer 12

a. apex

Question 13

what does it mean when a shell is in dextral coiling formation

Answer 13

right sided

Question 14

what does it mean when a shell is in sinistral coiling formation

Answer 14

left sided

Question 15

entry of snail shells

Answer 15

operculum

Question 16

habitats of gastropod

Answer 16

occupy all kinds of habitats

Question 17

3 subclasses of gastropoda

Answer 17

-prosobranchia
-opisthobranchia
- pulmonata

Question 18

largest subclass of gastropods with mostly marine species and some freshwater forms
a. prosobranchia
b. opisthobranchia
c. pulmonata

Answer 18

a. prosobranchia

Question 19

all marine species including sea slugs, sea hares, nudibranchs
a. prosobranchia
b. opisthobranchia
c. pulmonata

Answer 19

b. opisthobranchia

Question 20

terrestrial and freshwater species
a. prosobranchia
b. opisthobranchia
c. pulmonata

Answer 20

c. pulmonata

Question 21

long siphons may separate incurrent and excurrent flow
a. prosobranchia
b. opisthobranchia
c. pulmonata

Answer 21

a. prosobranchia

Question 22

limpets, flamingo tongues
a. prosobranchia
b. opisthobranchia
c. pulmonata

Answer 22

a. prosobranchia

Question 23

nudibranchs
a. prosobranchia
b. opisthobranchia
c. pulmonata

Answer 23

b. opisthobranchia

Question 24

shell is reduced or absent and all are monoecious
a. prosobranchia
b. opisthobranchia
c. pulmonata

Answer 24

b. opisthobranchs

Question 25

snail, slug a. prosobranchia b. opisthobranchia c. pulmonata

Answer 25

c. pulmonata

Question 26

show some detorsion, generally monoecious a. prosobranchia b. opisthobranchia c. pulmonata

Answer 26

c. pulmonata

Question 27

also called pelecypoda or hatchet-foot a. class gastropoda b. class bivalvia

Answer 27

b. class bivalvia

Question 28

Lack a head, radula, or other aspects of cephalization a. class gastropoda b. class bivalvia

Answer 28

b. class bivalvia

Question 29

are sexes are usually seperate in bivalvia?

Answer 29

yes

Question 30

These class are all marine predators

Answer 30

class cephalopoda

Question 31

squids, octopuses, nautiluses, devilfish and cuttlefish are part of this class

Answer 31

class cephalopoda