Question 1

Giardia and Trichomonas are unusual eukaryotes because they

Accepted Answer

A) are motile. 
B) lack mitochondria. 
C) lack nuclei. 
D) do not produce cysts. 
E) do produce cysts. 
A) are motile. 
B) lack mitochondria. 
C) lack nuclei. 
D) do not produce cysts. 
E) do produce cysts. B

Question 2

Table 12.1
 $$\begin{array} { l l } 
\text { 1-Arthroconidium } & \text { 5-Chlamydoconidium } \
\text { 2-Ascospore } & \text { 6-Conidiospore } \
\text { 3-Basidiospore } & \text { 7-Sporangiospore } \
\text { 4-Blastoconidium } & \text { 8-Zygospore }
\end{array}$$
-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) 1,3,5,8 
D) 2,4,6,7,8 
A) 1,4,5,6,7 
B) 2,3,6,8 
C) 1,3,5,8 
D) 2,4,6,7,8 A

Question 3

Contrast the economic benefits and the harmful effects of fungi.

Accepted Answer

Fungi can have both economic benefits and harmful effects.

Economic benefits of fungi include their role in food production. Many fungi, such as yeast and molds, are used in the production of food and beverages such as bread, beer, and cheese. Additionally, some fungi are used in the production of antibiotics and other pharmaceuticals. Fungi also play a crucial role in decomposition, breaking down organic matter and releasing nutrients back into the ecosystem, which is essential for agriculture and soil fertility.

On the other hand, fungi can also have harmful effects on the economy. Fungal diseases can devastate crops, leading to significant losses for farmers. For example, diseases such as wheat rust and potato blight can cause widespread crop failures, leading to food shortages and economic hardship. Fungi can also cause damage to infrastructure, such as buildings and wood products, through wood decay and rot.

In terms of human health, some fungi can cause harmful effects. Certain species of fungi can produce toxins that contaminate food and cause illness when consumed. Fungal infections, such as athlete's foot and ringworm, can also cause discomfort and inconvenience.

Overall, while fungi provide valuable economic benefits in food production and pharmaceuticals, they can also have harmful effects on agriculture, infrastructure, and human health. It is important to manage and mitigate the negative impacts of fungi while harnessing their economic potential.

Question 4

When we say that a human is a dead end host for a parasite,we mean

Accepted Answer

A) the human will die from the parasitic infection before being able to transmit it to another organism. 
B) the infected human is highly unlikely to transmit the infection to another organism. 
C) humans lack the correct anatomical structures for the parasite to exit the body. 
D) that the human isn't capable of being infected by the parasite. 
A) the human will die from the parasitic infection before being able to transmit it to another organism. 
B) the infected human is highly unlikely to transmit the infection to another organism. 
C) humans lack the correct anatomical structures for the parasite to exit the body. 
D) that the human isn't capable of being infected by the parasite.

Question 5

Plasmogamy,karyogamy,and meiosis are stages of the fungal sexual life cycle.

Accepted Answer

A) True 
 B)False

Question 6

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

Question 7

The Platyhelminthes group includes roundworms,tapeworms,and flukes.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following pairs is mismatched?

Accepted Answer

A) tick - Rocky Mountain spotted fever 
B) tick - Lyme disease 
C) mosquito - malaria 
D) mosquito - Pneumocystis 
E) mosquito - encephalitis 
A) tick - Rocky Mountain spotted fever 
B) tick - Lyme disease 
C) mosquito - malaria 
D) mosquito - Pneumocystis 
E) mosquito - encephalitis

Question 9

You see acid-fast oocysts in a fecal sample from a patient who has diarrhea.What is the MOST likely cause?

Accepted Answer

A) Cryptosporidium 
B) diatoms 
C) Entamoeba 
D) Giardia 
E) Taenia 
A) Cryptosporidium 
B) diatoms 
C) Entamoeba 
D) Giardia 
E) Taenia

Question 10

Which of the following is the most effective control for malaria?

Accepted Answer

A) vaccination 
B) treating patients 
C) eliminate Anopheles mosquitoes 
D) eliminate the intermediate host 
E) None of these is an effective control. 
A) vaccination 
B) treating patients 
C) eliminate Anopheles mosquitoes 
D) eliminate the intermediate host 
E) None of these is an effective control.

Question 11

In helminth life cycles,the organism that harbors the adult sexually reproductive phase of the parasite is called the intermediate host.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following statements about algae is FALSE?

Accepted Answer

A) They use light as their energy source. 
B) They use CO₂ as their carbon source. 
C) They produce oxygen from hydrolysis of water. 
D) All are unicellular. 
E) Some are capable of sexual reproduction. 
A) They use light as their energy source. 
B) They use CO₂ as their carbon source. 
C) They produce oxygen from hydrolysis of water. 
D) All are unicellular. 
E) Some are capable of sexual reproduction.

Question 13

Table 12.1
 $$\begin{array} { l l } 
\text { 1-Arthroconidium } & \text { 5-Chlamydoconidium } \
\text { 2-Ascospore } & \text { 6-Conidiospore } \
\text { 3-Basidiospore } & \text { 7-Sporangiospore } \
\text { 4-Blastoconidium } & \text { 8-Zygospore }
\end{array}$$
-In Table 12.1,which is a thick-walled spore formed as a segment within a hypha?

Accepted Answer

A) 1 
B) 3 
C) 5 
D) 7 
A) 1 
B) 3 
C) 5 
D) 7

Question 14

Which of the following statements regarding lichens is FALSE?

Accepted Answer

A) Lichens are a mutualistic relationship between a fungus and a protozoan. 
B) Lichens represent a mutualistic relationship between a fungus and an alga. 
C) Lichens are often the first life form to colonize rock or soil. 
D) The algal partner produces carbohydrates that are absorbed by the fungal partner. 
E) The fungal partner provides a means of attachment and protects the algal partner from desiccation. 
A) Lichens are a mutualistic relationship between a fungus and a protozoan. 
B) Lichens represent a mutualistic relationship between a fungus and an alga. 
C) Lichens are often the first life form to colonize rock or soil. 
D) The algal partner produces carbohydrates that are absorbed by the fungal partner. 
E) The fungal partner provides a means of attachment and protects the algal partner from desiccation.

Question 15

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

Question 16

Most cases of hookworm infection are acquired by ingestion of adult forms in contaminated food or water.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

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

Question 18

A definitive host harbors which stage of a parasite?

Accepted Answer

A) miracidium 
B) cyst 
C) adult 
D) larva 
E) All of the answers are correct. 
A) miracidium 
B) cyst 
C) adult 
D) larva 
E) All of the answers are correct.

Question 19

A wolf kills a deer that is infected with ________ of Echinococcus granulosis in its liver and eats it.After consuming the deer,the wolf's intestine becomes filled with a number of ________ produced from scoleces.These eventually release eggs into the wolf's intestines,which are released in its feces.

Accepted Answer

A) hydatid cysts;proglottids 
B) proglottids;hydatid cysts 
C) cysticerci;proglottids 
D) cercariae;cysticerci 
E) hydatid cysts;cercariae 
A) hydatid cysts;proglottids 
B) proglottids;hydatid cysts 
C) cysticerci;proglottids 
D) cercariae;cysticerci 
E) hydatid cysts;cercariae

Question 20

Cercariae,metacercaria,and redia are all life cycle stages of trematodes.

Accepted Answer

A) True 
 B)False

Exam 12: The Eukaryotes: Fungi, algae, protozoa, and Helminths

Giardia and Trichomonas are unusual eukaryotes because they

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?

Contrast the economic benefits and the harmful effects of fungi.

When we say that a human is a dead end host for a parasite,we mean

Plasmogamy,karyogamy,and meiosis are stages of the fungal sexual life cycle.

The Platyhelminthes group includes roundworms,tapeworms,and flukes.

Which of the following pairs is mismatched?

You see acid-fast oocysts in a fecal sample from a patient who has diarrhea.What is the MOST likely cause?

Which of the following is the most effective control for malaria?

In helminth life cycles,the organism that harbors the adult sexually reproductive phase of the parasite is called the intermediate host.

Which of the following statements about algae is FALSE?

Table 12.1 1-Arthroconidium 5-Chlamydoconidium 2-Ascospore 6-Conidiospore 3-Basidiospore 7-Sporangiospore 4-Blastoconidium 8-Zygospore -In Table 12.1,which is a thick-walled spore formed as a segment within a hypha?

Which of the following statements regarding lichens is FALSE?

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

Most cases of hookworm infection are acquired by ingestion of adult forms in contaminated food or water.

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

A definitive host harbors which stage of a parasite?

Cercariae,metacercaria,and redia are all life cycle stages of trematodes.

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic

Microbial Metabolism

Microbial Growth

The Control of Microbial Growth

Microbial Genetics

Biotechnology and Dna Technology

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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