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Bivalva Quiz
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1

What does the name “bivalvia” mean? What does the name “pelecypoda” mean?
2

What are the defining characteristics of the Class Bivalvia in the Phylum Mollusca?
3

What are the major bivalve characteristics?
4

What is the major habitat of bivalves?
5

What is the umbo? hinge ligament? adductor muscle? siphons?
6

What is the primitive subclass of bivalves? What does the name mean?
7

What type of gill is present in protobranch bivalves? What is its primary function?
8

How do protobranch bivalves collect food? What are labial palps? Pseudofeces? What is this type of feeding called?
9

What is the major subclass of bivalves? What does the name mean?
10

What are the defining characteristics of the Subclass Lamellibranchia in the Class Bivalvia?
11

What are the habitats of lamellibranchs?
12

What ecological role do lamellibranchs play?
13

What are the 2 functions of lamellibranch gills? How is the lamellibranch gill modified to perform these functions?
14

How does the nutrition of some deep-sea lamellibranchs, such as those at hydrothermal vents, differ from the majority?
15

What are byssal threads?
16

How do most bivalves avoid predation?
17

What is the defining characteristic of the 3rd (minor) subclass, the Septibranchia? What does the name mean? How do they feed?
18

Closely related to the bivalves (sharing a common ancestor) is the Class Scaphopoda. What does the name mean? What are common names of these?
19

What is the defining characteristic of the Class Scaphopoda?
20

Where do scaphopods live (habitat)?
21

What structures are lacking in scaphopods?
22

What does the name “cephalopoda” mean?
23

What are the defining characteristics of the Class Cephalopoda in the Phylum Mollusca?
24

Where do cephalopods live (habitat)? What is the largest marine invertebrate?
25

Describe the shell of Nautilus. How is the buoyancy of the shell changed as it migrates vertically daily?
26

How is the shell modified in other cephalopods? This is a major evolutionary change in cephalopod evolution!
27

With the loss of the shell for protection, what other adaptations for protection evolved?
28

How many hearts are present in the closed, high-pressurecirculatory system of cephalopods?
29

How have cephalopods adapted for an active, carnivorous lifestyle? How was the evolution of cephalopods affected by the diversification and success of the bony fishes?
30

What type of larva is characteristic of molluscs?
31

What group has a specialized glochidium larva?
32

What type of larva is characteristic of gastropods?
33

Which group lacks a free-living larva in the life-cycle of all species?





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