Ch.29 Animal Plant: Lophotrochozoans

Question 1

1. Name the two clades of protostomes?
   a. Lophotrochozoa and Deuterostomia.
   b. Ecdysozoa and Lophotrochozoa.
   c. Lophotrochozoa and Platyhelminthes.
   d. Protozoa and Lophotrochozoa.

Answer 1

b. Ecdysozoa and Lophotrochozoa

Question 2

This class of the Platyhelminthes consists of the parasitic flukes.
a. Turbellaria.
b. Cestoda.
c. Trematoda.
d. Nemertea.

Answer 2

c. Trematoda.

Question 3

What is the function of the scolex in a tapeworm?
a. Attachment to the host.
b. Gas exchange.
c. Reproduction.
d. Digestion.

Answer 3

a. Attachment to the host.

Question 4

Rotifers have a(n)______________.
a. incomplete digestive system
b. complete digestive system
c. circulatory system
d. B and C

Answer 4

b. complete digestive system

Question 5

Which class of molluscs is the most diverse?
a. Class Cephalopoda.
b. Class Bivalvia.
c. Class Polyplacophora.
d. Class Gastropoda.

Answer 5

d. Class Gastropoda.

Question 6

Setae serve various functions in different annelid species. They are used ______.
a. as anchor mechanisms
b. in locomotion
c. in respiration
d. all of the above

Answer 6

d. all of the above

Question 7

Earthworms are monoecious, meaning _______________.
a. they possess a singular sex organ
b. they possess both male and female organs
c. they eat only one sort of food
d. they are either male or female

Answer 7

b. they possess both male and female organs

Question 8

Which of the following are acoelomates?
a. Free-living planarians.
b. Flukes.
c. Tapeworms.
d. All of the above

Answer 8

d. All of the above

Question 9

What class of molluscs provides us with our seafood dinners of clams, oysters, mussels, and scallops?
a. Class Cephalopoda.
b. Class Bivalvia.
c. Class Polyplacophora.
d. Class Gastropoda.

Answer 9

b. Class Bivalvia.

Question 10

Cutting a planarian in half results in the subsequent formation of two fully formed individuals. What is this process called?
a. Magnification.
b. Regreneration
c. Reproduction.
d. Budding.

Answer 10

b. Regeneration

Question 11

Name this thick walled muscular structure found in the earthworm.
a. Crop.
b. Gizzard.
c. Clitellum.
d. Seminal vesicles.

Answer 11

b. Gizzard.

Question 12

What is the function of the pharynx in the planarian?
a. Obtaining food.
b. Excreting waste.
c. Reproduction.
d. Locomotion.

Answer 12

a. Obtaining food

Question 13

A pearl is made from what natural process?
a. A stone enters oysters or mussels and is rubbed smooth.
b. An irritant enters an oyster or mussel and is coated in calcium carbonate.
c. An organ within an oyster or mussel becomes calcified.
d. It is a genetic mutation in oysters and mussels.

Answer 13

b. An irritant enters an oyster or mussel and is coated in calcium carbonate.

Question 14

A radula is present in which mollusc?
a. Snail.
b. Clam.
c. Squid.
d. A and C.

Answer 14

d. A and C.

Question 15

Which of the following is NOT a characteristic of organisms in the class Cestoda?
a. Possess a muscular pharynx.
b. Are made up of a series of proglottids.
c. Are dependent on their host for nutrition.
d. Monoecious.

Answer 15

a. Possess a muscular pharynx.

Question 16

Which of the following is TRUE of flatworms?
a. They have bilateral symmetry.
b. They have anterior and posterior ends.
c. They can be parasitic.
d. All of the above.
e. A and B.

Answer 16

d. all of the above

Question 17

Where does gas exchange occur in turbellarians?
a. Anus.
b. Mouth.
c. Body surface.
d. B and C.

Answer 17

Body surface.

Question 18

Cestodes are dependent on their host for ____________ because they lack ______________.
a. protection, tegument
b. gas exchange, a mouth
c. nutrients, a digestive tract
d. warmth, a circulatory system

Answer 18

c. nutrients, a digestive tract

Question 19

Which of the following are NOT present in the rotifer?
a. Crown of cilia, or corona.
b. True coelom.
c. Complete digestive system.
d. Toes with spurs.

Answer 19

b. True coelom.

Question 20

Which of the following are found in both the rotifer and the annelid.
a. Segmented body.
b. Protective cuticle layer.
c. Cilia used for feeding and locomotion.
d. Incomplete digestive system.

Answer 20

b. Protective cuticle layer.

Question 21

How do turbellarians, such as the planaria, rid themselves of digestive waste products?
a. Anus.
b. Eject wastes through the mouth.
c. Diffuse across the surface of the body.
d. Paired protonephridia and flame cells.

Answer 21

b. Eject wastes through the mouth.

Question 22

Why do squid and other cephalopods secrete a substance known as dark sepia?
a. To attract mates.
b. To ambush their prey.
c. To create a screen for their escape.
d. To communicate with other cephalopods.

Answer 22

c. To create a screen for their escape.

Question 23

The visceral mass region of a mollusc contains which of the following?
a. Digestive and respiratory systems.
b. Digestive, respiratory, and circulatory systems.
c. Digestive and circulatory systems.
d. Digestive, respiratory, circulatory, and reproductive systems.

Answer 23

d. Digestive, respiratory, circulatory, and reproductive systems.

Question 24

Which of the following is NOT a characteristic of lophotrochozoans?
a. Horseshoe-shaped crown of ciliated tentacles.
b. Translucent top-shaped ciliated larvae.
c. Bilateral symmetry.
d. Deuterostomes.

Answer 24

d. Deuterostomes.

Question 25

Which of the following describes the order of infection for the Chinese liver fluke (Clonorchis sinensis)?
a. Water, fish, water, human.
b. Water, water, fish, snail, human.
c. Water, snail, water, fish, human.
d. Water, human, snail, water.

Answer 25

c. Water, snail, water, fish, human.

Question 26

Rotifers live in an environment susceptible to drying out. How does this organism cope with this environmental stress?
a. Reproduces asexually.
b. Reproduces sexually.
c. Enters a state of arrested biological activity.
d. Forms a sclerotium to withstand harsh conditions.

Answer 26

c. Enters a state of arrested biological activity.

Question 27

This is the ventral surface of what organism?

a. Barnacle.
b. Slug.
c. Chiton.
d. Snail.

Answer 27

c. Chiton

Question 28

Perfectly round holes in a mollusc’s shell are caused by ______________.
a. an enemy attacking internal muscle
b. the rasping of the radula of another mollusc
c. natural weathering processes
d. the grinding in of sand particles

Answer 28

b. the rasping of the radula of another mollusc

Question 29

Which of the following adjectives is most closely associated with the term nacreous?
a. Hard.
b. Dull.
c. Lustrous.
d. Gritty.

Answer 29

c. Lustrous.

Question 30

Which feature is NOT attributed to leeches in centuries-old medical procedures?
a. Anesthetic.
b. Anticoagulant.
c. Vasodilator.
d. Antibacterial.

Answer 30

d. Antibacterial.