Question 1

You observe a mass of amboeba- like cells that swarm together, form a stalk, and produce spores. This is a(n)

Accepted Answer

A)  tapeworm. 
B)  Euglenozoa. 
C)  plasmodial slime mold. 
D)  ascomycete. 
E)  cellular slime mold. 
A)  tapeworm. 
B)  Euglenozoa. 
C)  plasmodial slime mold. 
D)  ascomycete. 
E)  cellular slime mold.

Question 2

In mid- December, a woman with insulin- dependent diabetes who had been on prednisone fell and received an abrasion on the dorsal side of her right hand. She was placed on penicillin. By the end of January, the ulcer had not healed, and she was referred to a plastic surgeon. On January 30, a swab of the wound was cultured at 35°C on blood agar. On the same day, a smear was made for Gram staining. The Gram stain showed large (10 µm) cells. Brownish, waxy colonies grew on the blood agar. Slide cultures set up on February 1 and incubated at 25°C showed septate hyphae and single conidia. The most likely cause of the infection is a

Accepted Answer

A)  protozoan. 
B)  gram- negative bacterium. 
C)  yeast. 
D)  parasitic alga. 
E)  dimorphic fungus. 
A)  protozoan. 
B)  gram- negative bacterium. 
C)  yeast. 
D)  parasitic alga. 
E)  dimorphic fungus.

Question 3

Provide an explanation for the complex life cycles exhibited by parasitic helminths. Cite specific examples in your explanation.

Accepted Answer

Parasitic helminths, which include vario

Question 4

Table 12.1 $$\begin{array} { l l } 
\text { 1- Arthroconidium } & \text { 5-Chlamydoconidium } \
\text { 2-Ascospore } & \text { 6-Conidiospore } \
\text { 3- Basidiospore } & \text { 7-Sporangiospore } \
\text { 4- Blastoconidium } & 8 \text {-Zygospore }
\end{array}$$
-In Table 12.1, which of these spores are asexual spores?

Accepted Answer

A)  1, 4, 5, 6, 7 
B)  2, 3, 6, 8 
C)  2, 4, 6, 7, 8 
D)  1, 3, 5, 8 
E)  All of the spores are asexual. 
A)  1, 4, 5, 6, 7 
B)  2, 3, 6, 8 
C)  2, 4, 6, 7, 8 
D)  1, 3, 5, 8 
E)  All of the spores are asexual.

Question 5

Which of the following tends to be more complex in a parasitic helminth than in free- living helminths?

Accepted Answer

A)  digestive system 
B)  nervous system 
C)  reproductive system 
D)  digestive and nervous systems 
E)  digestive, reproductive, and nervous systems 
A)  digestive system 
B)  nervous system 
C)  reproductive system 
D)  digestive and nervous systems 
E)  digestive, reproductive, and nervous systems

Question 6

The Platyhelminthes group includes roundworms, tapeworms, and flukes.

Accepted Answer

A) True 
 B)False

Question 7

The insect vectors have six legs and include ticks, mosquitoes, and lice.

Accepted Answer

A) True 
 B)False

Question 8

Ringworm is caused by a(n)

Accepted Answer

A)  fungus. 
B)  cestode. 
C)  trematode. 
D)  protozoan. 
E)  nematode. 
A)  fungus. 
B)  cestode. 
C)  trematode. 
D)  protozoan. 
E)  nematode.

Question 9

The encysted larva of the beef tapeworm is called a

Accepted Answer

A)  cysticercus. 
B)  metacercaria. 
C)  proglottid. 
D)  redia. 
E)  cercaria. 
A)  cysticercus. 
B)  metacercaria. 
C)  proglottid. 
D)  redia. 
E)  cercaria.

Question 10

In the microscope, you observe multinucleated amoeboid cells with sporangia that form spores. This is a(n)

Accepted Answer

A)  tapeworm. 
B)  plasmodial slime mold. 
C)  cellular slime mold. 
D)  Euglenozoa. 
E)  ascomycete. 
A)  tapeworm. 
B)  plasmodial slime mold. 
C)  cellular slime mold. 
D)  Euglenozoa. 
E)  ascomycete.

Question 11

Below are paired items referring to the heartworm Dirofilaria immitis. Which of the pairs is mismatched?

Accepted Answer

A)  mosquito - vector 
B)  mosquito - definitive host 
C)  dog - definitive host 
D)  dog - sexual reproduction 
E)  None of the pairs is mismatched. 
A)  mosquito - vector 
B)  mosquito - definitive host 
C)  dog - definitive host 
D)  dog - sexual reproduction 
E)  None of the pairs is mismatched.

Question 12

The cells of plasmodial slime molds can grow to several centimeters in diameter because

Accepted Answer

A)  the large surface can absorb nutrients. 
B)  they have organelles. 
C)  they form spores. 
D)  they have a mouth to ingest nutrients. 
E)  they distribute nutrients by cytoplasmic streaming. 
A)  the large surface can absorb nutrients. 
B)  they have organelles. 
C)  they form spores. 
D)  they have a mouth to ingest nutrients. 
E)  they distribute nutrients by cytoplasmic streaming.

Question 13

If a larva of Echinococcus granulosus is found in humans, humans are the

Accepted Answer

A)  infected host. 
B)  definitive host. 
C)  reservoir. 
D)  intermediate host. 
E)  None of the answers is correct. 
A)  infected host. 
B)  definitive host. 
C)  reservoir. 
D)  intermediate host. 
E)  None of the answers is correct.

Question 14

Which of the following statements is FALSE?

Accepted Answer

A)  Fungi produce sexual spores. 
B)  Fungi produce asexual spores. 
C)  Fungal spores are for asexual or sexual reproduction. 
D)  Fungal spores are used in identification of fungi. 
E)  Fungal spores are highly resistant to heat and chemical agents. 
A)  Fungi produce sexual spores. 
B)  Fungi produce asexual spores. 
C)  Fungal spores are for asexual or sexual reproduction. 
D)  Fungal spores are used in identification of fungi. 
E)  Fungal spores are highly resistant to heat and chemical agents.

Question 15

All of the following are characteristic of the Platyhelminthes EXCEPT that they

Accepted Answer

A)  are multicellular animals. 
B)  have highly developed digestive and nervous systems. 
C)  can be divided into flukes and tapeworms. 
D)  are hermaphroditic. 
E)  are dorsoventrally flattened. 
A)  are multicellular animals. 
B)  have highly developed digestive and nervous systems. 
C)  can be divided into flukes and tapeworms. 
D)  are hermaphroditic. 
E)  are dorsoventrally flattened.

Question 16

Which of the following pairs is mismatched?

Accepted Answer

A)  Ascomycota - conidiospores 
B)  microsporidia - lack mitochondria 
C)  Basidiomycota - basidiospores 
D)  Zygomycota - sporangiospores 
E)  anamorphs - lack spores 
A)  Ascomycota - conidiospores 
B)  microsporidia - lack mitochondria 
C)  Basidiomycota - basidiospores 
D)  Zygomycota - sporangiospores 
E)  anamorphs - lack spores

Exam 12: The Eukaryotes: Fungi, Algae, Protozoa, and Helminths

You observe a mass of amboeba- like cells that swarm together, form a stalk, and produce spores. This is a(n)

Provide an explanation for the complex life cycles exhibited by parasitic helminths. Cite specific examples in your explanation.

Table 12.1 1- Arthroconidium 5-Chlamydoconidium 2-Ascospore 6-Conidiospore 3- Basidiospore 7-Sporangiospore 4- Blastoconidium 8 -Zygospore -In Table 12.1, which of these spores are asexual spores?

Which of the following tends to be more complex in a parasitic helminth than in free- living helminths?

The Platyhelminthes group includes roundworms, tapeworms, and flukes.

The insect vectors have six legs and include ticks, mosquitoes, and lice.

Ringworm is caused by a(n)

The encysted larva of the beef tapeworm is called a

In the microscope, you observe multinucleated amoeboid cells with sporangia that form spores. This is a(n)

Below are paired items referring to the heartworm Dirofilaria immitis. Which of the pairs is mismatched?

The cells of plasmodial slime molds can grow to several centimeters in diameter because

If a larva of Echinococcus granulosus is found in humans, humans are the

Which of the following statements is FALSE?

All of the following are characteristic of the Platyhelminthes EXCEPT that they

Which of the following pairs is mismatched?

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic Cells

Microbial Metabolism

Microbial Growth

The Control of Microbial Growth

Microbial Genetics

Biotechnology and Recombinant Dna

Classification of Microorganisms

The Prokaryotes: Domains Bacteria and Archaea

Viruses, Viroids, and Prions

Principles of Disease and Epidemiology

Microbial Mechanisms of Pathogenicity

Innate Immunity: Nonspecific Defenses of the Host

Adaptive Immunity: Specific Defenses of the Host

Practical Applications of Immunology

Disorders Associated With the Immune System

Antimicrobial Drugs

Microbial Diseases of the Skin and Eyes

Microbial Diseases of the Nervous System

Microbial Diseases of the Cardiovascular and Lymphatic Systems

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Diseases of the Urinary and Reproductive Systems

Environmental Microbiology

Applied and Industrial Microbiology

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