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Name ______________________________ Class ___________________ Date __________________
SECTION 35-1 REVIEW
MOLLUSCA
VOCABULARY REVIEW Explain the relationship between the terms in each
of the following pairs of terms.
1. visceral mass, mantle ______________________________________________
_______________________________________________________________
_______________________________________________________________
2. hemolymph, hemocoel ____________________________________________
_______________________________________________________________
_______________________________________________________________
3. incurrent siphon, excurrent siphon ___________________________________
_______________________________________________________________
_______________________________________________________________
MULTIPLE CHOICE Write the correct letter in the blank.
_____ 1. One advantage of a coelom over a pseudocoelom is that a coelom
a.
b.
c.
d.
contains fluid while a pseudocoelom does not.
is completely surrounded by endoderm.
eliminates the need for a circulatory system.
allows body wall muscles to contract without hindering digestion.
_____ 2. One feature that is shared by many mollusks and annelids is the
a. radula.
b. mantle cavity.
c. trochophore. d. pseudopodium.
_____ 3. Mollusks in the class Gastropoda
a. lack a distinct head.
c. do not have a hemocoel.
b. have an open circulatory system. d. are usually sessile.
_____ 4. Bivalves have all of the following structures except
a. a radula. b. adductor muscles. c. siphons.
d. gills.
_____ 5. An octopus generally moves by
a.
b.
c.
d.
pumping a jet of water through its incurrent siphon.
crawling along the bottom with its tentacles.
gliding on a layer of mucus with the help of cilia.
repeatedly opening its valves and snapping them shut.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Modern Biology
191
Mollusca
Name ______________________________ Class ___________________ Date __________________
SHORT ANSWER Answer the questions in the space provided.
1. Identify the two main regions of a typical mollusk’s body.
_______________________
_______________________________________________________________
Which region contains most of the internal organs? _____________________
Which region is directly involved with locomotion? _____________________
2. What is the usual function of the mantle in a snail or clam?
_______________________
_______________________________________________________________
3. Contrast the feeding methods of gastropods and bivalves.
_______________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
4. Contrast sexual reproduction of marine clams and most freshwater clams.
_______________________
_______________________________________________________________
_______________________________________________________________
5. Critical Thinking A cephalopod called the paper nautilus makes a type of
shell with its foot. This shell, which consists largely of protein, is formed only
by the female and is used to protect the eggs. List four reasons why this shell
is not a typical molluskan shell. _______________________
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
STRUCTURES AND FUNCTIONS Identify the structures labeled a–h in the
diagram of the basic body plan of a mollusk shown below.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Modern Biology
192
Mollusca
Name ______________________________ Class ___________________ Date __________________
SECTION 35-2 REVIEW
ANNELIDA
VOCABULARY REVIEW Define the following terms.
1. seta ____________________________________________________________
_______________________________________________________________
2. parapodium _____________________________________________________
_______________________________________________________________
3. typhlosole ______________________________________________________
_______________________________________________________________
4. nephridium______________________________________________________
_______________________________________________________________
MULTIPLE CHOICE Write the correct letter in the blank.
_____ 1. Segmentation is an advantage for annelid worms because it
a.
b.
c.
d.
requires the whole body to move as a single unit.
reduces the number of setae on the parapodia.
divides the pseudocoelom into multiple compartments.
is accompanied by the duplication of some internal organs.
_____ 2. Contraction of an earthworm’s longitudinal muscles
a. pushes the anterior end forward. c. pulls the posterior end forward.
b. pulls the anterior end backward. d. pushes the posterior end
backward.
_____ 3. An earthworm uses its setae to
a. grip the soil surface.
c. contract in a longitudinal
direction.
b. contract in a circular direction. d. form a protective case for its
eggs.
_____ 4. One difference between leeches and polychaetes is that leeches
a. do not have segments.
b. do not have setae.
c. have parapodia.
d. are never carnivorous.
_____ 5. All annelids in the classes Oligochaeta and Hirudinea have
a. gills.
b. parapodia.
c. a segmented coelom.
d. an open circulatory system.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Modern Biology
193
Mollusca
Name ______________________________ Class ___________________ Date __________________
SHORT ANSWER Answer the questions in the space provided.
1. How does the function of an earthworm’s crop differ from that of its gizzard?
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
2. List three benefits of earthworm activity. ______________________________
_______________________________________________________________
_______________________________________________________________
3. What is the function of an earthworm’s aortic arches? ____________________
_______________________________________________________________
4. Describe the locomotion of a leech on land. ____________________________
_______________________________________________________________
_______________________________________________________________
5. Critical Thinking Some parasitic leeches are attracted by warmth. What type
of host would you expect such leeches to have, and what would be the
adaptive advantage of this attraction?
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
STRUCTURES AND FUNCTIONS Identify the structures labeled a–h in the
diagram of an earthworm shown below.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Modern Biology
194
Mollusca