Biology
Ch. 20
A protist is any organism that is
not a plant, an animal, a fungus,
or a(an)
1.
2.
3.
4.
eukaryote.
prokaryote.
eubacterium.
archaebacterium.
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Multicellular protists are grouped
with unicellular protists because
multicellular protists
1.
2.
3.
4.
do not resemble plants.
do not resemble animals.
do not resemble fungi.
are very similar to
unicellular protists.
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According to Lynn Margulis, eukaryotic
cells may have evolved from
1. a symbiosis of several
cells.
2. mitochondria that grew
very large.
3. chloroplasts that grew very
large.
4. plants, animals, and fungi.
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In an amoeba, a small cavity
within the cytoplasm that stores
food is called a
1.
2.
3.
4.
gullet.
pseudopod.
food vacuole.
contractile
vacuole.
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To which phylum do amoebas,
foraminiferans, and heliozoans
belong?
1.
2.
3.
4.
sarcodines
ciliates
sporozoans
pseudopods
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Zooflagellates may live in lakes and
streams, where they
1. penetrate and live within cells
of a host.
2. absorb food through their cell
membrane.
3. feed by sweeping food particles
into their gullet.
4. feed by surrounding their meal
and taking it inside themselves.
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Which structure of a paramecium
is analogous to a “reserve copy”
of all the cell’s genes?
1.
2.
3.
4.
the micronucleus
the gullet
the trichocysts
the macronucleus
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The sporozoan Plasmodium
causes the disease known as
1. African sleeping
sickness.
2. amebic dysentery.
3. malaria.
4. algal bloom.
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Which statement about malaria is true?
1. Not all strains can be treated, and
there is no completely effective
vaccine.
2. Many strains can be treated with
modern drugs; however, there is no
completely effective vaccine.
3. All strains can be treated with
modern drugs, and there is an
effective vaccine.
4. Malaria has been eradicated by
control of the Anopheles mosquito.
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Which of the following diseases
does the animallike protist known
as Entamoeba cause?
1. malaria
2. African sleeping
sickness
3. amebic dysentery
4. potato blight
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A person who comes down with malaria
can infer that he or she contracted it from
1. contaminated water
supplies.
2. infection by the animallike
protist Giardia.
3. the bite of the Anopheles
mosquito.
4. the bite of the tsetse fly.
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Which substances allow algae to harvest
and use the energy from sunlight?
1. cilium and fucoxanthin
2. chlorophyll and
accessory pigments
3. phycobilin and
flagellum
4. oogonium and
antheridium
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As sunlight passes through sea
water, the sea water
1. absorbs large amounts of
red and violet wavelengths.
2. reflects large amounts of
red and violet wavelengths.
3. absorbs large amounts of
blue wavelengths.
4. none of the above
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What effect did the evolution of different
forms of chlorophyll in algae have?
1. a decrease in the range of
depths at which algae can live
2. an increase in the range of
depths at which algae can live
3. no effect on the range of depths
at which algae can live
4. a reduction in the
photosynthetic capacity of algae
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To which phylum of unicellular
plantlike algae do the diatoms
belong?
1.
2.
3.
4.
Euglenophyta
Bacillariophyta
Chrysophyta
Pyrrophyta
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Euglenas have an intricate, folded
cell membrane called a(an)
1.
2.
3.
4.
cell wall.
trichocyst.
eyespot.
pellicle.
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Which of the statements is true about
dinoflagellates?
1. They contain bright yellow
pigments.
2. They can be both photosynthetic
and heterotrophic.
3. Many species are luminescent.
4. They possess pillbox-shaped cell
walls of silica.
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What do the members of the phylum Pyrrophyta
have in common with many of the members of
the phylum Chrysophyta?
1. They have cell walls of
cellulose.
2. They have cell walls of silica.
3. They have pellicles.
4. They can be both
photosynthetic and
heterotrophic.
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A bloom is
1. the clouding of water by
sewage.
2. an enormous mass of
algae.
3. a symbiotic relationship
between algae and coral.
4. none of the above
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The population of small,
photosynthetic organisms found near
the surface of the ocean is called
1.
2.
3.
4.
chrysophytes.
pyrophytes.
phytoplankton.
diatoms.
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Which organism would most likely
be present in a water sample
collected during a red tide?
1.
2.
3.
4.
Tridacna
Euglenophyta
Gonyaulax
diatoms
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Which phylum causes the red tide
that infects shellfish with a toxin?
1.
2.
3.
4.
Chrysophyta
Euglenophyta
Bacillariophyta
Pyrrophyta
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An example of a multicellular
green alga is
1.
2.
3.
4.
Ulva.
Chlamydomonas.
Volvox.
Fucus.
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What characteristic of plants is
shared by green algae?
1. cell wall
composition
2. photosynthetic
pigments
3. multicellularity
4. all of the above
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Red algae lack flagella and
1. nuclei.
2. centrioles.
3. accessory
pigments.
4. chlorophyll.
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The phylum of multicellular
algae most likely to be observed
at great depths is
1.
2.
3.
4.
Chlorophyta.
Rhodophyta.
Phaeophyta.
none of the
above
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Many algae switch back and forth between
diploid and haploid stages during their life
cycle in a process known as
1. alternation of
generations.
2. fusion of opposite
mating types.
3. sexual reproduction.
4. asexual reproduction.
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The green alga Chlamydomonas
reproduces asexually by
producing
1.
2.
3.
4.
gametophytes.
sporophytes.
zygotes.
zoospores.
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In the life cycle of the green alga
Ulva, one of the phases produces
male and female gametes known as
1.
2.
3.
4.
sporophytes.
gametophytes.
spores.
zoospores.
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An argument that does NOT support the
classification of multicellular green algae as
plants is that multicellular green algae
1. have highly specialized tissues.
2. live primarily in water.
3. display alternation of
generations.
4. contain chlorophyll a, which
makes them green.
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Why are algae considered one of the most
important groups of organisms on our planet?
1. They are rich in vitamin C.
2. They produce chemicals that are
used to treat health problems.
3. They produce much of Earth’s
oxygen through photosynthesis.
4. They produce chemicals that are
used to make plastics, waxes, and
paints.
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Some products derived from
algae include
1. drugs for stomach ulcers
and high blood pressure.
2. thickeners for food.
3. chemicals in plastics,
waxes, paints, and
lubricants.
4. all of the above
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Which of the following is algae’s most
important contribution to humans?
1. as a source for industrial
chemicals
2. as a source for medicinal
drugs
3. as a photosynthesizer
4. as a direct food source for
humans
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Which of the following groups
includes only funguslike protists?
1. cellular slime molds, brown
algae, water molds
2. cellular slime molds, acellular
slime molds, water molds
3. cellular slime molds, acellular
slime molds, animallike protists
4. cellular slime molds, fungi, water
molds
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Funguslike protists get nutrients by
1. photosynthesis.
2. living as an animal
parasite.
3. absorbing them from
dead or decaying
matter.
4. none of the above
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Which type of protist is likely to
be found in a damp, nutrient-rich
environment?
1.
2.
3.
4.
a single-celled alga
an animallike protist
a funguslike protist
all of the above
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The funguslike protists that thrive
on dead or decaying organic
matter in water, some of which
are plant parasites on land, are
1.
2.
3.
4.
water molds.
acellular slime molds.
cellular slime molds.
true fungi.
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When the amoebalike cells of
acellular slime molds fuse, they
form structures with many nuclei
called
1. plasmodia.
2. zoosporangia.
3. spores.
4. filaments.
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In oomycetes, sexual
reproduction takes place in the
1. migrating
colony.
2. sporangium.
3. antheridium and
oogonium.
4. zoosporangium.
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What structure of an acellular
slime mold is analogous to the
colony of cellular slime molds?
1. sporangium
2. germinating
spore
3. zygote
4. plasmodium
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Protists that break down organic
material include the
1.
2.
3.
4.
funguslike protists.
animallike protists.
plantlike protists.
none of the above
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The work of funguslike protists
and other decomposers is
important in improving the
quality of
1.
2.
3.
4.
salt water.
fresh water.
topsoil.
potato crops.
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What kinds of weather conditions
might cause a farmer to worry
about infection by Phytophthora
infestans?
1.
2.
3.
4.
warm and dry
cool and dry
warm and wet
cool and wet
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A mildewed grape crop might be
caused by a(an)
1. cellular slime
mold.
2. acellular slime
mold.
3. water mold.
4. none of the above
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Protists are a diverse group of
mainly multicellular eukaryotes.
1. True
2. False
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Ciliates use flagella for feeding
and movement.
1. True
2. False
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2
If the people in a town contracted
amebic dysentery or infections by the
animallike protist, Giardia, the most
likely cause would be contaminated
drinking water.
1. True
2. False
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2
The type of chlorophyll most
efficient at capturing red and
violet light is chlorophyll a.
1. True
2. False
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2
Euglenas have cell walls
composed of silica and shaped
like the two sides of a pillbox.
1. True
2. False
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1
0%
2
Blooms of dinoflagellates can
cause red tides.
1. True
2. False
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2
A high level of certain toxins found
in filter feeders, such as clams, may
be a sign that an algal bloom has
occurred.
1. True
2. False
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1
0%
2
The brown accessory pigment
found in brown algae is
phycobilin.
1. True
2. False
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1
0%
2
Members of the phylum
Rhodophyta contain the
accessory pigment phycobilin.
1. True
2. False
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2
The life cycles of many algae
include both a diploid and a
haploid generation.
1. True
2. False
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2
Dried Porphyran, called nori in
Japanese, is a green alga.
1. True
2. False
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1
0%
2
Funguslike protists are
autotrophs.
1. True
2. False
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Slime molds are funguslike
protists that play key roles in
recycling organic matter.
1. True
2. False
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0%
2
Slime molds and water molds are
important decomposers.
1. True
2. False
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2
Unlike many others in the same phylum,
the spores of the Myxomycota that
caused potato blight in nineteenthcentury Ireland are airborne.
1. True
2. False
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