A definitive host harbors which stage of a parasite?
adult
All of the following are characteristic of algae EXCEPT which ONE of the following?
They are currently classified as plants.
All of the following are characteristic of lichens EXCEPT
they are a symbiotic relationship between a fungus and a protozoan.
All of the following are characteristic of the Platyhelminthes EXCEPT that they
have highly developed digestive and nervous systems
Assume you have isolated a multicellular heterotrophic organism that produces coenocytic hyphae, motile zoospores, and cellulose cell walls. It is most likely a(n)
oomycote alga
Below are paired items referring to the heartworm Dirofilaria immitis. Which of the pairs is mismatched?
mosquito — definitive host
Giardia and Trichomonas are unusual eukaryotes because they
lack mitochondria
Helminthic diseases are usually transmitted to humans by
gastrointestinal route
If a larva of Echinococcus granulosus is found in humans, humans are the
intermediate host
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. The most likely cause of the infection is a
dimorphic fungus
In the malaria parasite life cycle, humans are the ________ host, while mosquitoes are the ________ host as well as the vector.
intermediate; definitive
In the microscope, you observe multinucleated amoeboid cells with sporangia that form spores. This is a(n)
plasmodial slime mold
Ringworm is caused by a(n)
fungus
Seventeen patients in ten hospitals had cutaneous infections caused by Rhizopus. Fungi are more likely than bacteria to contaminate bandages because they
can tolerate low-moisture conditions.
The cells of plasmodial slime molds can grow to several centimeters in diameter because
they distribute nutrients by cytoplasmic streaming.
The encysted larva of the beef tapeworm is called a
cysticercus.
The life cycle of the fish tapeworm is similar to that of the beef tapeworm. Which of the following is the most effective preventive measure?
cooking fish before eating
Three weeks after a river rafting trip, three family members experienced symptoms of coughing, fever, and chest pain. All of the family members recovered following treatment with praziquantel. In the Paragonimus life cycle,
humans are the definitive host and crayfish are the intermediate host.
What do tapeworms eat?
intestinal contents
Which of the following arthropods does NOT transmit diseases by sucking blood from a human host?
houseflies
Which of the following groups of algae does NOT produce compounds that are toxic to humans?
green algae
Which of the following is a nucleated, unicellular organism that, if you changed the incubation temperature, would form filaments with conidiospores?
ascomycete
Which of the following is the most effective control for malaria?
eliminate Anopheles mosquitoes
Which of the following organisms is photoautotrophic protozoan?
Euglena
Which of the following pairs is mismatched?
anamorphs — lack spores
Which of the following pairs is mismatched?
coenocytic hyphae — hyphae with cross-walls
Which of the following pairs is mismatched?
green algae — prokaryotic
Which of the following pairs is mismatched?
cestodes — all are free-living
Which of the following pairs is mismatched?
mosquito — Pneumocystis
Which of the following statements about algae is FALSE?
All are unicellular.
Which of the following statements about helminths is FALSE?
All are parasites.
Which of the following statements about the oomycote algae is FALSE?
They have chlorophyll
Which of the following statements is FALSE?
Fungal spores are highly resistant to heat and chemical agents.
Which of the following statements regarding fungi is FALSE?
Most fungi are pathogenic for humans
Which of the following statements regarding lichens is FALSE?
Lichens are a mutualistic relationship between a fungus and a protozoan
Which of the following statements regarding protozoa is FALSE?
Nearly all protozoa cause disease.
Which of the following tends to be more complex in a parasitic helminth than in free-living helminths?
reproductive system
Yeast infections are caused by
Candida albicans.
You observe a mass of amoeba-like cells that swarm together, form a stalk, and produce spores. This is a(n)
cellular slime mold.
You see acid-fast oocysts in a fecal sample from a patient who has diarrhea. What is the MOST likely cause?
Cryptosporidium
x

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