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Glencoe Biology

Alton Biggs

Chapter 25

Worms and Mollusks - all with Video Answers

Educators

Chapter Questions

00:27

Problem 1

What is a group of nerve cell bodies that coordinates ingoing and outgoing messages?

Aditya Sood
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00:40

Problem 2

What is a tubelike muscular organ that releases digestive enzymes?

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Aditya Sood
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00:35

Problem 3

What structure attaches to the intestinal lining of a host with hooks and suckers?

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Aditya Sood
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01:28

Problem 4

What function does the structure in the diagram perform?
A. digestion
B. movement
C. maintains homeostasis
D. provides support

Jordan Abadie
Jordan Abadie
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00:40

Problem 5

Which animals have proglottids?
A. flukes
B. planarians
C. tapeworms
D. roundworms

Aditya Sood
Aditya Sood
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00:46

Problem 6

Which classification fits a flatworm that is free-living?
A. Turbellaria
B. Cestoda
C. Trematoda
D. Nematoda

Aditya Sood
Aditya Sood
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00:46

Problem 7

Which is not involved in planarian movement?
A. cilia
B. muscles
C. mucus
D. flame cells

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Aditya Sood
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01:43

Problem 8

A certain tapeworm secretes a chemical that slows the intestinal pulsations of its host. This helps to ensure that the tapeworm is not expelled from the body of the host. Explain how adding this chemical to a drug for humans might increase the drug's effectiveness.

Jordan Abadie
Jordan Abadie
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02:15

Problem 9

Design a parasitic worm for an animal that lives in the desert. Remember to consider how the animal will contract the parasite and how the parasite will stay within its host.

Jordan Abadie
Jordan Abadie
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02:56

Problem 10

Design an experiment that would determine what a planarian prefers to eat.

Jordan Abadie
Jordan Abadie
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00:42

Problem 11

Each of the following sentences is false. Make each sentence true by replacing the italicized word with a vocabulary term from the Study Guide page.
Roundworms are bilaterally symmetrical, cylindrical, segmented, and are tapered at both ends.

Aditya Sood
Aditya Sood
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00:40

Problem 12

Each of the following sentences is false. Make each sentence true by replacing the italicized word with a vocabulary term from the Study Guide page.
Trichinosis can be contracted by walking barefoot on contaminated soil.

Aditya Sood
Aditya Sood
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00:35

Problem 13

Each of the following sentences is false. Make each sentence true by replacing the italicized word with a vocabulary term from the Study Guide page.
Roundworms have crosswise muscles that cause their bodies to move in a thrashing manner.

Aditya Sood
Aditya Sood
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00:50

Problem 14

Which feature of roundworms is illustrated in the diagram above?
A. pseudocoelom
B. scolex
C. circulatory system
D. nervous system

Aditya Sood
Aditya Sood
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00:42

Problem 15

The feature in the diagram led to which adaptation in roundworms?
A. a coelom
B. a gut
C. a mantle
D. segments

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02:13

Problem 16

Make a diagram that shows the life cycle of a beef tapeworm.

Jordan Abadie
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01:36

Problem 17

Select a human parasite and indicate with a key on a map of the world where the parasite is most common. Visit biologygmh.com to find information.

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Jordan Abadie
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01:17

Problem 18

Make a concept map that uses the following words: nematode, pseudocoelomate, digestive tract with two openings, parasitic, free-living, lengthwise muscles, host.

Jordan Abadie
Jordan Abadie
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01:00

Problem 19

Imagine that you find a tiny worm in the garden. How could you determine whether it is a flatworm or a roundworm?

Aditya Sood
Aditya Sood
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00:49

Problem 20

An analogy is a comparison relationship between two pairs of words and can be written in the following manner: $A$ is to $B$ as $C$ is to $D .$ In the analogies that follow, one of the words is missing. Complete each analogy with a vocabulary term from the Study Guide page.
Kidney is to metabolic waste as _____ is to cellular waste.

Aditya Sood
Aditya Sood
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01:32

Problem 21

An analogy is a comparison relationship between two pairs of words and can be written in the following manner: $A$ is to $B$ as $C$ is to $D .$ In the analogies that follow, one of the words is missing. Complete each analogy with a vocabulary term from the Study Guide page.
Tongue is to candy as ____ is to algae.

Jordan Abadie
Jordan Abadie
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00:51

Problem 22

An analogy is a comparison relationship between two pairs of words and can be written in the following manner: $A$ is to $B$ as $C$ is to $D .$ In the analogies that follow, one of the words is missing. Complete each analogy with a vocabulary term from the Study Guide page.
Legs are to running as _____ is to jet-propelled swimming.

Aditya Sood
Aditya Sood
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00:29

Problem 23

If the mantle of a bivalve was damaged, the bivalve would not be able to do which function?
A. maintain its shell
B. digest food
C. circulate blood
D. excrete wastes

Aditya Sood
Aditya Sood
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02:00

Problem 24

Which word pair is related most closely?
A. shell-circulation
B. redula-feeding
C. jet-propelled swimming-bivalve
D. open circulatory system-octopus

Jordan Abadie
Jordan Abadie
Numerade Educator
00:56

Problem 25

The phylogenetic tree of animals shows that mollusks have which feature?
A. a pseudocoelom
B. a coelom
C. solid bodies
D. shells

Aditya Sood
Aditya Sood
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00:51

Problem 26

Which group is related most closely to mollusks?
A. nematodes
B. enchinoderms
C. annelids
D. chordates

Aditya Sood
Aditya Sood
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04:37

Problem 27

Make a dichotomous key to identify mollusk shells that you find in pictures in books about animals, shells that you have collected, or shells that your teacher supplies.

Jordan Abadie
Jordan Abadie
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01:29

Problem 28

Marine biologists know that zebra mussels are pests in many aquatic ecosystems. They form ultra dense colonies and can clog pipes leading to water-treatment and industrial plants. However, some marine biologists hypothesize that because the mussels live in such dense groups, they might serve as water-purification systems in places such as zoo ponds and other park ponds that have excessive algae blooms in the summer. Design an experiment that would determine if zebra mussels could be used to purify water.

Jordan Abadie
Jordan Abadie
Numerade Educator
00:56

Problem 29

An analogy is a comparison relationship between two pairs of words and can be written in the following manner: $A$ is to $B$ as $C$ is to $D .$ In the analogies that follow, one of the words is missing. Complete each analogy with a vocabulary term from the Study Guide page.
Teeth are to human as ____ is to earthworm.

Aditya Sood
Aditya Sood
Numerade Educator
00:42

Problem 30

An analogy is a comparison relationship between two pairs of words and can be written in the following manner: $A$ is to $B$ as $C$ is to $D .$ In the analogies that follow, one of the words is missing. Complete each analogy with a vocabulary term from the Study Guide page.
Cocoon is to butterfly as _____ is to earthworm.

Aditya Sood
Aditya Sood
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01:02

Problem 31

An analogy is a comparison relationship between two pairs of words and can be written in the following manner: $A$ is to $B$ as $C$ is to $D .$ In the analogies that follow, one of the words is missing. Complete each analogy with a vocabulary term from the Study Guide page.
Vacuole is to protist as _____ is to earthworm.

Aditya Sood
Aditya Sood
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00:52

Problem 32

Which animal is illustrated in the diagram?
A. roundworm
B. leech
C. polychaete
D. earthworm

Aditya Sood
Aditya Sood
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00:45

Problem 33

What feature is characteristic of this animal?
A. foot
B. parapodia
C. sucker
D. shell

Aditya Sood
Aditya Sood
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00:54

Problem 34

If global warming continues, predict how earthworms might change as a result of natural selection.

Aditya Sood
Aditya Sood
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00:51

Problem 35

Rheumatologists, doctors who treat arthritis, have observed that when leeches are applied for a short time to the skin near joints of people affected with arthritis, pain is relieved for up to six months. Design an experiment that would explain this phenomenon.

Akhil Choudhary
Akhil Choudhary
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02:44

Problem 36

Research mollusks that live in areas of hydrothermal vents. Write a report emphasizing the differences between hydrothermal vent mollusks and those that live in the habitats you studied in this chapter.

Jordan Abadie
Jordan Abadie
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01:32

Problem 37

The data below represent the percentages of the three main classes of flatworms. (FIGURE CAN'T COPY) Approximately what percentage of flatworms are flukes?

Jordan Abadie
Jordan Abadie
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01:15

Problem 38

The data below represent the percentages of the three main classes of flatworms. (FIGURE CAN'T COPY) Which group of flatworms has the least number of species?

Jordan Abadie
Jordan Abadie
Numerade Educator
02:58

Problem 39

The data below represent the percentages of the three main classes of flatworms. (FIGURE CAN'T COPY) Infer why there might be so many more of one kind of flatworm than any other kind.

Jordan Abadie
Jordan Abadie
Numerade Educator
01:34

Problem 40

Place the following steps of DNA translation in the correct order. (Chapter 12 )
1. tRNA carrying a methionine moves into the $\mathrm{P}$ site.
2. The mRNA attaches to the ribosome.
3. A tRNA brings the appropriate amino acid to the A site.
4. The tRNA is released to the E site.
A. 2,1,3,4
B. 4,3,1,2
C. 3,1,2,4
D. 3,2,4,1

Aditya Sood
Aditya Sood
Numerade Educator