Transcript Which major group of protists is most closely related to

Which major group of protists is
most closely related to animals?
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2.
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amoebozoans
euglenoids
green algae
ciliates
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The group most closely related
to plants is ________.
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brown algae
green algae
red algae
diplomonads
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A sexually transmitted disease that can
damage the urinary and reproductive tracts
is caused by the organism ________.
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1. Trichonympha
campanula
2. Giardia lamblia
3. Trichomonas
vaginalis
4. Trypanosoma
brucei
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Select the false statement
about euglenoids.
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euglenoids all contain
chloroplasts with chlorophyll
a and b in their membranes
an eyespot near the base of
their flagellum allows
euglenoids to detect light
euglenoids reproduce
asexually by binary fission
a contractile vacuole
removes water that crosses
its membrane
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3.
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Kinetoplastids are ________.
1. organelles of certain
protists specialized
to store starch
2. flagellates which are
nearly all parasitic
3. autotrophic ciliates
4. heterotrophic
radiolarians
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Some photosynthetic protists, including
________, are symbionts of predatory
foraminiferans.
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golden algae
euglenoids
diatoms
brown algae
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3
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4
The pellicle of a paramecium
does not ________.
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1. store calcium ions
and maintain the
cell's structure
2. control the rate of
ciliary beating
3. anchor trichocysts
4. expel excess water
from the cell
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During protozoan conjugation,
________.
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the two cells undergo
cytoplasmic fusion, then their
micronuclei enter mitosis
each cell trades a daughter
micronucleus with its partner
the macronucleus of each
cell enters meiosis
the macronucleus
degenerates, then three
micronuclei fuse and form a
new macronucleus
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Since the dinoflagellates responsible for red
tides are photosynthetic oxygen-producers,
why do these blooms suffocate fish?
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if dinoflagellate populations are quite
high they can coat the gills of fish,
preventing gas exchange
toxin produced by the dinoflagellates
binds to sodium pumps in cell
membranes, disrupting nerve cell
functioning
cellulose deposited by
dinoflagellates is toxic to fish
aerobic bacteria that decompose the
remains of the dinoflagellates
themselves increase after a bloom,
removing oxygen from the water
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Neurotoxic shellfish poisoning
________.
1.
is caused by eating
poisonous species of
shellfish
kills many species of shellfish
including clams, oysters, and
mussels
sickens people who eat
shellfish from areas affected
by Karenia brevis blooms
is due to eating improperly
prepared puffer fish
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3.
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The stage of the plasmodium parasite that is
transmitted to humans by the bite of a
mosquito is the ________.
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sporozoite
merozoite
gametocyte
zygote
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Malaria symptoms in an infected
person begin when ________.
1.
the female Anopheles
mosquito bites the victim
the bloodstream carries the
sporozoites to the liver
merozoites in the liver
develop into gametocytes
and enter the blood
infected liver cells rupture
and release merozoites into
the blood
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General characteristics of chrysophytes
include all of the following except
________.
1.
Most are free-living
photosynthetic cells
They contain chlorophylls a,
C1, and C2
The group includes golden
algae, yellow-green algae,
and brown algae
Their chloroplasts have four
outer membranes
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3.
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The chrysophytes that can produce enough
dimethyl sulfide waste to force migratory fish
to change course are the ________.
1. golden algae
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2. coccolithophores
3. diatoms
4. yellow-green
algae
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The largest, most complex multicellular
protists are the giant kelps, which are a type
of ________ algae.
1. brown
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2. yellow-green
3. green
4. golden
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Oomycotes ________.
1.
are classified as fungi due to
their absorptive mode of
nutrition
produce nonmotile female
gametes in egg chambers
have cell walls of chitin
are symbionts with roots of
plants, increasing nitrogen
fixation
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The stramenopile responsible for
sudden oak death is ________.
1. Phytophthora
infestans
2. Phytophthora
ramorum
3. Saprolegnia
4. Plasmopara
viticola
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Identify the false statement about the
life cycle of the red algae, Porphyra.
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the sheetlike form of Porphyra,
used to wrap sushi, is the
gametophyte generation
the gametes of red algae are not
flagellated
the diploid stage of red algae is
visible as an inconspicuous
pinkish growth on shells
deeper dwelling species have
darker coloration due to the
presence of phycobilins that
absorb red light
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During the life cycle of Chlamydomonas, a
green algae, ________.
1.
up to sixteen daughter cells form
by mitosis within a parent cell,
and escape by secreting
enzymes to digest the parent
diploid spores are produced by
mitosis in a germinating zygote
deteriorating environmental
conditions trigger the production
of resistant haploid spores
gametes undergo cytoplasmic
fusion, then nuclear fusion to
produce a multicellular diploid
sporophyte
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A plasmodium is ________.
1.
a multinucleate mass
resulting from mitosis without
cytokinesis (cytoplasmic
division)
an aggregation of cells, each
with its own nucleus and
plasma membrane
a free-living amoeba
a cluster of haploid spores on
a cellular stalk
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When Entamoeba divides, occasionally the
two daughter cells cannot completely
separate. This results in ________.
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a multinucleate plasmodium
the death of both the
daughter cells
the release of a chemical that
attracts a neighboring
amoeba to act as "midwife"
and sever the connection
a cellular slime mold
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4.
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