Deck 21: The Diversity of Protists

Question 1

Which group of protists includes photosynthetic, individual cells that lack a rigid cell wall and move via a flagellum?

A) Amoebas
B) Water molds
C) Diatoms
D) Euglenids
E) Slime molds

Answer 1

D

Question 2

Protists that have two nuclei are classified as

A) ciliates.
B) apicomplexans.
C) amoebas.
D) parabasalids.
E) diplomonads.

Answer 2

E

Question 3

A parasitic protist that presents a major health problem to backpackers and hikers if they drink unfiltered stream or lake water is

A) Didinium.
B) Giardia.
C) Pfiesteria.
D) Trypanosoma.
E) Plasmodium.

Answer 3

B

Question 4

Which of the following best fits into the protist's group?

A) Animals
B) Prokaryotes
C) Fungi
D) Plants
E) Any eukaryote that is not a plant, animal, or fungus

Question 5

Protists

A) are prokaryotic.
B) carry out photosynthesis without chloroplasts.
C) form a single clade.
D) obtain nutrition through a variety of different methods.
E) develop embryos during reproduction.

Question 6

A protist that lives inside a host organism and absorbs nutrients from that living host is

A) symbiotic.
B) predatory.
C) parasitic.
D) photosynthetic.
E) a decomposer.

Question 7

Protists that absorb nutrients from dead organic matter are called

A) decomposers.
B) parasitic.
C) symbiotic.
D) predatory.
E) photosynthetic.

Question 8

Secondary endosymbiosis can occur when a

A) nonphotosynthetic protist engulfs a photosynthetic protist.
B) protist evolves to become a prokaryote.
C) nonphotosynthetic protist engulfs a photosynthetic bacterium.
D) green alga engulfs a photosynthetic bacterium.
E) virus infects a photosynthetic prokaryote.

Question 9

Which group of protists includes photosynthetic, unicellular, freshwater organisms that possess eyespots?

A) Amoebas
B) Apicomplexans
C) Alveolates
D) Brown algae
E) Euglenids

Question 10

Which protist causes a sexually transmitted disease?

A) Plasmodium
B) Pfiesteria
C) Trichomonas
D) Giardia
E) Trypanosoma

Question 11

Protists that lack mitochondria are

A) amoebas.
B) excavates.
C) apicomplexans.
D) euglenozoans.
E) ciliates.

Question 12

Both Trichomonas and Giardia are parasitic protists in the group called

A) excavates.
B) slime molds.
C) alveolates.
D) diatoms.
E) euglenids.

Question 13

The eyespot of a Euglena cell enables it to

A) orient toward light.
B) see images in black and white only.
C) photosynthesize.
D) see images in color.
E) spot potential predators.

Question 14

A flagellated protist lives inside the guts of termites and enables the termites to digest the cellulose in wood as a food source. This protist belongs to the

A) apicomplexans.
B) Archaea.
C) parabasalids.
D) amoebas.
E) ciliates.

Question 15

The first protist chloroplast was likely to have been a(n)

A) symbiotic green alga.
B) chemosynthetic bacterium.
C) example of secondary endosymbiosis.
D) virus.
E) photosynthetic bacterium.

Question 16

The foundation of a marine food chain is

A) plants.
B) fungi.
C) Archaea.
D) viruses.
E) algae.

Question 17

Which cell structure is missing in Trichomonas and Giardia?

A) Cysts
B) Mitochondria
C) Flagella
D) Nuclei
E) Cell membranes

Question 18

are photosynthetic protists.

A) Parasites
B) Plants
C) Fungi
D) Algae
E) Prokaryotes

Question 19

Which one of the following groups is characterized as eukaryotic?

A) Prions
B) Cyanobacteria
C) Protists
D) Viruses
E) Bacteria

Question 20

Protist photosynthesis relies on

A) chloroplasts.
B) silica.
C) pseudoplasmodia.
D) eyespots.
E) pseudopods.

Question 21

Which group comprises a significant portion of phytoplankton and therefore is important to marine food webs?

A) Diatoms
B) Cyanobacteria
C) Euglenids
D) Protozoa
E) Slime molds

Question 22

Which protist causes African sleeping sickness?

A) Plasmodium
B) Giardia
C) Pfiesteria
D) Didinium
E) Trypanosoma

Question 23

Both cyanobacteria and phytoplankton are

A) parasitic.
B) eukaryotic.
C) heterotrophic.
D) photosynthetic.
E) multicellular.

Question 24

The giant kelp found along the Pacific coast is an example of

A) slime molds.
B) water molds.
C) cyanobacteria.
D) brown algae.
E) phytoplankton.

Question 25

Which protist group includes the dinoflagellates, apicomplexans, and ciliates?

A) Alveolates
B) Diatoms
C) Protozoa
D) Euglenids
E) Stramenopiles

Question 26

When a red tide occurs, huge numbers of microscopic organisms are filtered out of coastal waters by oysters and clams. This sometimes causes the shellfish to become toxic to people who eat them. The organisms that create the red tide are classified as

A) slime molds.
B) dinoflagellates.
C) diatoms.
D) red algae.
E) euglenids.

Question 27

Which group of photosynthetic, mostly marine protists was named for the motion created by their two whip- like flagella?

A) Euglenids
B) Dinoflagellates
C) Cercozoans
D) Amoebas
E) Apicomplexans

Question 28

Which protist group includes the water molds, diatoms, and brown algae?

A) Excavates
B) Stramenopiles
C) Euglenids
D) Slime molds
E) Diplomonads

Question 29

Which protist group includes organisms that can reach heights of hundreds of feet and grow more than half a foot per day?

A) Phytoplankton
B) Brown algae
C) Slime molds
D) Cyanobacteria
E) Water molds

Question 30

Which group has caused such agricultural problems as downy mildew, potato blight, and an avocado disease?

A) Protozoa
B) Diatoms
C) Cyanobacteria
D) Slime molds
E) Oomycetes

Question 31

Which organism caused the disease that destroyed potato crops and led to the Irish potato famine in the mid- 1800s?

A) Excavates
B) Water mold
C) Alveolates
D) Kinetoplastids
E) Trypanosoma

Question 32

Which organisms are responsible for the majority of photosynthesis?

A) Ferns
B) Phytoplankton
C) Cyanobacteria
D) Flowering plants
E) Conifers

Question 33

Which of the following is a characteristic of the organism that causes malaria?

A) Prokaryotic
B) Unicellular
C) Multicellular
D) Viral
E) Photosynthetic

Question 34

Which unicellular protists have silica shells consisting of top and bottom halves that fit together like pillboxes?

A) Diatoms
B) Euglenids
C) Slime molds
D) Apicomplexans
E) Amoebas

Question 35

Which group is characterized by gritty, glassy, protective shells?

A) Slime molds
B) Water molds
C) Diatoms
D) Dinoflagellates
E) Brown algae

Question 36

Both Didinium and Paramecium are protists in the group called

A) alveolates.
B) slime molds.
C) rhizarians.
D) excavates.
E) ciliates.

Question 37

Which group is commonly referred to as the "seaweeds"?

A) Cyanobacteria
B) Ciliates
C) Brown algae
D) Water molds
E) Phytoplankton

Question 38

The oomycete that nearly destroyed the French wine industry in the late 1870s was

A) a cercozoan.
B) a protozoan.
C) a slime mold.
D) red tide.
E) a water mold.

Question 39

Paralytic shellfish poisoning occurs when are eaten by humans or marine mammals.

A) euglenids
B) excavates
C) diatoms
D) diplomonads
E) dinoflagellates

Question 40

Free- floating, photosynthetic, unicellular protists include

A) amoebas.
B) cyanobacteria.
C) brown algae.
D) phytoplankton.
E) ciliates.

Question 41

The short, hair- like structures that propel Paramecium through the water are called

A) cilia.
B) vacuoles.
C) flagella.
D) pseudoplasmodia.
E) pseudopods.

Question 42

Which of the following may be parasitic with humans?

A) Amoeba
B) Diatom
C) Apicomplexan
D) Slime mold
E) Dinoflagellate

Question 43

Calcium carbonate shells and thread- like pseudopods are characteristic of

A) radiolarians.
B) euglenids.
C) excavates.
D) foraminiferans.
E) alveolates.

Question 44

Plasmodial slime molds are described as acellular because they

A) reproduce asexually.
B) are heterotrophic.
C) have no membranes surrounding their nuclei.
D) have no nuclei.
E) lack DNA.

Question 45

Which of the following has pseudopods?

A) Ciliate
B) Apicomplexan
C) Slime mold
D) Amoeba
E) Diatom

Question 46

Which of the following is eukaryotic, usually acts as a producer in its ecosystem, and spins via its flagella?

A) Cyanobacterium
B) Slime mold
C) Dinoflagellate
D) Sporozoan
E) Apicomplexan

Question 47

The protist characterized by a silica shell and thread- like pseudopods is a(n)

A) foraminiferan.
B) euglenid.
C) alveolate.
D) excavate.
E) radiolarian.

Question 48

The protists make up an inadequately defined and poorly organized group that biologists will likely reorganize.

Question 49

Which group has silica shells similar to those of diatoms?

A) Apicomplexans
B) Ciliates
C) Dinoflagellates
D) Euglenids
E) Radiolarians

Question 50

Which of the following is the parasite apicomplexans that causes malaria if it infects a human host?

A) Plasmodium
B) Paramecium
C) Trichomonas
D) Giardia
E) Pfisteria

Question 51

Which of the following is a parasitic protist that is spread by Anopheles mosquitoes?

A) Paramecium
B) Plasmodium
C) Pfisteria
D) Giardia
E) Trichomonas

Question 52

A _ forms when an acellular slime mold is exposed to dry conditions or starvation.

A) plasmodium
B) cellular slime mold
C) fruiting body
D) water mold

Question 53

The protists are a group that can best be defined as "any eukaryote that is not a plant, animal, or fungus."

Question 54

Some protists can cause sexually transmitted diseases in humans.

Question 55

Which of the following is considered to be most closely related to plants?

A) Brown algae
B) Euglenids
C) Diatoms
D) Green algae
E) Slime molds

Question 56

A pseudoplasmodium is a(n)

A) disease- causing protist.
B) acellular slime mold.
C) aggregation of mycelia.
D) group of cellular slime mold cells.
E) extension of the slime mold that engulfs prey.

Question 57

The protists include photosynthetic, parasitic, and pathogenic species.

Question 58

Which of the following characteristics distinguishes red algae from diatoms and dinoflagellates?

A) One is multicellular, whereas the other is not.
B) One lives in an aquatic environment.
C) One is photosynthetic, whereas the other is not.
D) One is eukaryotic, whereas the other is not.
E) One is a protist, whereas the other is not.

Question 59

Alveolates are characterized by pseudopods and silica shells.

Question 60

Which protozoan group consists entirely of parasitic forms?

A) Amoebas
B) Ciliates
C) Slime molds
D) Apicomplexans
E) Radiolarians

Question 61

Beavers are major carriers of Giardia, which is a member of the group that can cause severe diarrhea in people who drink water that contains the organism's cysts.

Question 62

Some protists, such as amoebas, rely on finger- like projections called for capturing prey and moving.

Question 63

Malaria is caused by a protist that is transmitted by the bite of a(n) .

Question 64

The majority of photosynthesis is carried out by phytoplankton.

Question 65

The most complex group of unicellular protists is the .

Question 66

The group of protistan aquatic organisms known generally as produces most of the world's oxygen.

Question 67

The White Cliffs of Dover, England, were formed over millions of years by the accumulation of calcium carbonate shells from _.

Question 68

The process in which photosynthetic bacteria were engulfed by a large cell and formed chloroplasts is called
.

Question 69

is a protistan parasite that causes malaria in humans.

Question 70

The active, feeding form of a(n) is a thin, multinucleate plasmodium.

Question 71

Chalk deposits are formed from the ancient remains of apicomplexans.

Question 72

Diplomonads have two nuclei and move via flagella.

Question 73

Trypanosoma is a protistan parasite that causes in humans.

Question 74

The way that Giardia normally infects a host is when the host ingests _ in contaminated water.

Question 75

The coral that make up a tropical coral reef can survive only in clear, well- lit waters because of the symbiotic, photosynthetic that live within the tissues of the coral.

Question 76

Organisms with pseudopods can surround other organisms and trap them in a for digestion.

Question 77

The algae are an important source of carrageenan, which is used to thicken paints, cosmetics, and ice cream.

Question 78

Giardia is found in fresh water and causes an intestinal infection in mammals.

Question 79

Excavates lack .

Question 80

Euglenids have functional eyespots that can discern all colors of visible light and the movement of predators.