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Which of the following statements about helminths is FALSE?


A) They are heterotrophic.
B) They are multicellular animals.
C) Some have male and female reproductive organs in one animal.
D) They have eukaryotic cells.
E) All are parasites.

F) A) and D)
G) C) and D)

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Assume you have isolated a multicellular heterotrophic organism that produces coenocytic hyphae, motile zoospores, and cellulose cell walls. It is most likely a(n)


A) ascomycete fungus.
B) zygomycete fungus.
C) tapeworm.
D) oomycote alga.
E) green alga.

F) A) and C)
G) A) and E)

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Yeast infections are caused by


A) Saccharomyces cerevisiae.
B) Penicillium.
C) Histoplasma.
D) Candida albicans.
E) Aspergillus.

F) D) and E)
G) A) and B)

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

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Parasitic helminths, which include vario...

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A definitive host harbors which stage of a parasite?


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

F) All of the above
G) B) and E)

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Helminthic diseases are usually transmitted to humans by


A) aerosols.
B) vectors.
C) genitourinary route.
D) respiratory route.
E) gastrointestinal route.

F) None of the above
G) C) and D)

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Ringworm is caused by a(n)


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

F) A) and D)
G) D) and E)

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Which of the following pairs is mismatched?


A) nematodes  complete digestive tract
B) nematodes  many are free-living
C) trematodes  flukes
D) cestodes  all are free-living
E) cestodes  segmented body made of proglottids

F) A) and E)
G) B) and C)

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Which of the following pairs are mismatched? 1. arthroconidium  formed by fragmentation 2) sporangiospore  formed within hyphae 3) conidiospore  formed in a chain 4) blastoconidium  formed from a bud 5) chlamydoconidium  formed in a sac


A) 2 and 3
B) 4 and 5
C) 3 and 4
D) 2 and 5
E) 1 and 2

F) A) and E)
G) A) and B)

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The Platyhelminthes group includes roundworms, tapeworms, and flukes.

A) True
B) False

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Which of the following groups of algae does NOT produce compounds that are toxic to humans?


A) diatoms
B) green algae
C) dinoflagellates
D) red algae
E) None of the answers is correct; all of these groups of algae produce compounds toxic to humans.

F) A) and B)
G) C) and D)

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

A) True
B) False

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The encysted larva of the beef tapeworm is called a


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

F) A) and E)
G) C) and D)

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Both the cellular slime molds and the plasmodial slime molds are members of the phylum Amoebozoa.

A) True
B) False

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Which of the following pairs is mismatched?


A) teleomorph  produces both sexual and asexual spores
B) systemic mycosis  fungal infection of body organs
C) dimorphic fungus  grows as a yeast or a mold
D) dermatomycosis  fungal infection of the skin
E) coenocytic hyphae  hyphae with cross-walls

F) B) and E)
G) A) and C)

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Contrast the economic benefits and the harmful effects of fungi.

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Fungi can have both economic benefits an...

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Which of the following statements regarding protozoa is FALSE?


A) Nearly all protozoa cause disease.
B) Protozoa are unicellular eukaryotes.
C) Protozoa are common in water and soil.
D) Most protozoa reproduce asexually.
E) Some protozoan pathogens are transmitted by arthropod vectors.

F) B) and C)
G) B) and E)

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What do tapeworms eat?


A) host tissues
B) plant matter
C) intestinal contents
D) intestinal bacteria
E) red blood cells

F) B) and C)
G) D) and E)

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