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32 notecards = 8 pages (4 cards per page)

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Chp 12

front 1

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

a. Green algae

b. Dinoflagellates

c. All of these produce compounds toxic to humans

d. Diatoms

e. Red algae

back 1

a. Green algae

front 2

Which of the following is NOT a characteristic of parasitic platyhelminths?

a. They are dorsoventrally flattened

b. They are hermaphrodatic

c. They are multicellular animals

d. They have a complete digestive system

e. They can be divided into flukes and tapeworms

back 2

d. They have a complete digestive system

front 3

A definitive host harbors which stage of a parasite?

a. Cyst

b. Larva

c. Adult

d. Miracidium

e. All of these

back 3

c. Adult

front 4

Which of the following pairs is mismatched?

a. Tick - Lyme disease

b. Mosquito - Pneumocystis

c. Mosquito - malaria

d. Mosquito - encephalitis

e. Tick - Rocky mountain spotted fever

back 4

b. Mosquito - Pneumocystis

front 5

Which of the following arthropods does NOT transmit diseases by sucking blood from a human host?

a. Lice

b. Kissing bugs

c. Fleas

d. Houseflies

e. Mosquitoes

back 5

d. Houseflies

front 6

In a food chain consisting of the following, which acts as a producer?

a. Fungi

b. Lichens

c. Protozoa

d. Slime molds

back 6

b. Lichens

front 7

Multinucleated amoebalike cells that produce fungus like spores

a. Plasmodial slime mold

b. Tapeworm

c. Euglenozoa

d. Cellular slime mold

e. Ascomycete

back 7

a. Plasmodial slime mold

front 8

The microspora and archaezoa are unusual eukaryotes because they

a. Lack nuclei

b. Lack mitochondria

c. Do produce cysts

d. Are motile

e. Don't produce cysts

back 8

b. Lack mitochondria

front 9

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

a. None of these

b. They have organelles

c. They distribute nutrients by cytoplasmic streaming

d. They form spores

e. The large surface can absorb nutrients

back 9

c. They distribute nutrients by cytoplasmic streaming

front 10

Which of the following statements about the Oomycote algae is false?

a. They produce zoospores in a sporangium

b. They cause plant disease

c. They form hyphae

d. They have chlorophyll

e. They reproduce sexually

back 10

d. They have chlorophyll

front 11

All algae are

a. None of these

b. Plants

c. Toxic

d. Photoautotrophs

e. Unicellular

back 11

a. None of these

front 12

Cercariae, metacercaria, miracidia, and rediae are stages in the life cycle of

a. Sporozoans

b. Nematodes

c. Cestodes

d. Trematodes

e. Sarcodina

back 12

b. Nematodes

front 13

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

a. Taenia

b. Cyrptosporidium

c. Entamoeba

d. Diatoms

e. Giardia

back 13

b. Cyrptosporidium

front 14

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

a. All of these are correctly matched

b. Dog - definitive host

c. Mosquito - definitive host

d. Dog - sexual reproduction

e. Mosquito - vector

back 14

c. Mosquito - definitive host

front 15

Which of the following systems in a parasitic helminth is not greatly reduced compared to free-living helminths?

a. All are reduced

b. Digestive system

c. Nervous system

d. Reproductive system

e. Locomotion

back 15

d. Reproductive system

front 16

Yeast infections are caused by

a. Saccharomycescervisiae

b. Penicillum

c. Candida albicans

d. Aspergillus

e. Histoplasma

back 16

c. Candida albicans

front 17

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?

a. Refrigerating stored fish

b. Salting fish before eating

c. Not swimming in fish-infested waters

d. Cooking fish before eating

e. Wearing gloves while handling fish

back 17

d. Cooking fish before eating

front 18

Which stage immediately precedes the adult?

a. Miracidium

b. Metacercaria

c. Proglottid

d. Cercaria

e. Redia

back 18

b. Metacercaria

front 19

What do tapeworms eat?

a. Red blood cells

b. Intestinal contents

c. Host tissues

d. Intestinal bacteria

e. Plant matter

back 19

b. Intestinal contents

front 20

Amoebalike vegetative structures that produce sporangia.

a. Euglenozoa

b. Tapeworm

c. Cellular slime mold

d. Plasmodia; slime mold

e. Ascomycete

back 20

c. Cellular slime mold

front 21

A nucleated, unicellular organism; when you change the incubation temperature, it forms filaments with conidiospores

a. Plasmodial slime mold

b. Acomycete

c. Cellular slime mold

d. Euglenozoa

e. Tapeworm

back 21

b. Acomycete

front 22

Which of the following statements about fungi is false?

a. All fungi are unicellular

b. All fungi have eukaryotic cells

c. Most fungi are aerobic

d. Fungi are heterotrophic

e. Few fungi are pathogenic to humans

back 22

a. All fungi are unicellular

front 23

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

a. Yeast

b. Dimorphic fungus

c. Protozoan

d. Gram-negative bacterium

e. Parasitic alga

back 23

b. Dimorphic fungus

front 24

Fungi, more often than bacteria, are responsible for decomposition of plant materials because

a. They have a fermentative metabolism

b. They can tolerate high osmotic pressure

c. They are aerobic

d. They can tolerate low moisture conditions

e. They prefer a neutral environment

back 24

d. They can tolerate low moisture conditions

front 25

Ringworm is caused by a(n)

a. Protozoan

b. Nematode

c. Trematode

d. Cestode

e. Ascomycete

back 25

e. Ascomycete

front 26

Seventeen patients in ten hospitals had cutaneous infections caused by Rhizopus. In all 17 patients, Elastoplast bandages were placed over sterile gauze pads to cover wounds. Fourteen of the patients had surgical wounds, two had venous line insertion sites, and one had a bite wound. Lesions present when the bandages were removed ranged from vesiculopustular eruptions to ulcerations and skin necrosis requiring debridement. Fungi are more likely than bacteria to contaminate bandages because

a. They can tolerate low-moisture conditions

b. They are aerobic

c. They prefer a neutral environment (pH7)

d. They cannot tolerate high osmotic pressure

e. They have a fermentative metabolism

back 26

a. They can tolerate low-moisture conditions

front 27

Which of the following statements about algae is false?

a. They use light as their energy source

b. All are unicellular

c. They produce oxygen from hydrolysis of water

d. Some are capable of sexual reproduction

e. They use CO2 as their carbon source

back 27

b. All are unicellular

front 28

Which of the following pairs is mismatched?

a. Diatoms - petroleum

b. Brown algae -algin

c. Red algae - agar

d. Dinoflagellates - paralytic shellfish poisoning

e. Green algae - prokaryotic

back 28

e. Green algae - prokaryotic

front 29

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

a. Intermediate host

b. None of these

c. Definitive host

d. Infected host

e. Reservoir

back 29

a. Intermediate host

front 30

A multicellular organism; the digestive tract has one opening

a. Euglenozoa

b. Ascomycete

c. Cellular slime mold

d. Plasmodial slime mold

e. Tapeworm

back 30

e. Tapeworm

front 31

Helminthic diseases are usually transmitted to humans by

a. Aerosols

b. Genitourinary route

c. Vectors

d. Respiratory route

e. Gastrointestinal route

back 31

e. Gastrointestinal route

front 32

An organism that can grow photoautotrophically in the light and chemoheterotrophically in the dark

a. Cellular slime mold

b. Euglena

c. Oomycote

d. Phytophthora

e. Plasmodial slime mold

back 32

b. Euglena