Multiple Choice Identify the
choice that best completes the statement or answers the question.
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1.
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Which of the following series of groups contains only funguslike
protists?
a. | cellular slime molds, acellular slime molds, animal-like protists | b. | cellular slime
molds, fungi, water molds | c. | cellular slime molds, brown algae, water
molds | d. | cellular slime molds, acellular slime molds, water
molds |
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2.
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When the amoeba-like cells of acellular slime molds fuse, they form structures
with many nuclei called
a. | spores. | c. | filaments. | b. | zoosporangia. | d. | plasmodia. |
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3.
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Some products derived from algae include
a. | thickeners for food. | b. | drugs for stomach ulcers and high blood
pressure. | c. | chemicals in plastics, waxes, paints, and lubricants. | d. | all of the
above |
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4.
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What do the members of the phylum Pyrrophyta have in common with many of the
members of the phylum Chrysophyta?
a. | They can be both photosynthetic and heterotrophic. | b. | They have
pellicles. | c. | They have cell walls of cellulose. | d. | They have cell walls of
silica. |
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5.
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Giant kelp, the largest known species of algae, is a type of
a. | diatom. | c. | red alage. | b. | brown algae. | d. | green algae. |
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6.
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The green alga Chlamydomonas reproduces asexually by producing
a. | sporophytes. | c. | zygotes. | b. | gametophytes. | d. | zoospores. |
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7.
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Many algae switch back and forth between diploid and haploid stages during their
life cycle in a process known as
a. | sexual reproduction. | c. | alternation of generations. | b. | asexual
reproduction. | d. | fusion of
opposite mating types. |
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8.
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A bloom is
a. | a symbiotic relationship between algae and coral. | b. | an enormous mass of
algae. | c. | the clouding of water by sewage. | d. | none of the
above |
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9.
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Chlorophyll a is best at absorbing
a. | blue light. | c. | yellow and green light. | b. | red and violet
light. | d. | green
light. |
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10.
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Funguslike protists get nutrients by
a. | living as an animal parasite. | b. | photosynthesis. | c. | absorbing them from
dead or decaying matter. | d. | none of the
above |
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11.
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What kinds of weather conditions might cause a farmer to worry about infection
by Phytophthora infestans?
a. | warm and dry | c. | cool and wet | b. | cool and dry | d. | warm and wet |
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12.
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A mildewed grape crop might be caused by a(an)
a. | acellular slime mold. | c. | cellular slime mold. | b. | water mold. | d. | none of the
above |
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13.
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Which organism would most likely be present in a water sample collected during a
red tide?
a. | diatoms | c. | Tridacna | b. | Euglenophyta | d. | Gonyaulax |
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14.
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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
a. | acellular slime molds. | c. | true fungi. | b. | water molds. | d. | cellular slime
molds. |
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15.
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Members of the phylum Chrysophyta contain chloroplasts of what color?
a. | silver | c. | green | b. | gold | d. | red |
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16.
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An argument that does NOT support the classification of multicellular green
algae as plants is that multicellular green algae
a. | display alternation of generations. | b. | have highly specialized
tissues. | c. | live primarily in water. | d. | contain chlorophyll a, which makes them
green. |
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17.
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Approximately what percent of all the photosynthesis on Earth is carried out by
algae?
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18.
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Phytoplankton are only found at the surface of ocean waters because
a. | they feed on tiny organisms living at the surface. | b. | they require
sunlight to carry out photosynthesis. | c. | they cannot withstand the colder temperatures
of deep water. | d. | they are an important food source to surface-dwelling marine
organisms. |
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19.
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The work of funguslike protists and other decomposers is important in improving
the quality of
a. | potato crops. | c. | salt water. | b. | topsoil. | d. | fresh water. |
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20.
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Which characteristic distinguishes funguslike protists from fungi?
a. | Fungi have centrioles. | c. | Fungi have cell walls made of chitin. | b. | Funguslike protists
grow in damp places. | d. | Funguslike protists absorb food through their cell
membranes. |
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21.
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In the life cycle of the green alga Ulva, one of the phases produces male
and female gametes known as
a. | spores. | c. | zoospores. | b. | gametophytes. | d. | sporophytes. |
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22.
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What characteristic of plants is shared by green algae?
a. | photosynthetic pigments | c. | cell wall
composition | b. | multicellularity | d. | all of the above |
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23.
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Why are algae considered one of the most important groups of organisms on our
planet?
a. | They produce chemicals that are used to make plastics, waxes, and
paints. | b. | They produce much of Earth’s oxygen through photosynthesis. | c. | They produce
chemicals that are used to treat health problems. | d. | They are rich in vitamin
C. |
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24.
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Which substances allow algae to harvest and use the energy from sunlight?
a. | chlorophyll and accessory pigments | c. | oogonium and
antheridium | b. | phycobilin and flagellum | d. | cilium and fucoxanthin |
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25.
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Which of the statements is true about dinoflagellates?
a. | Many species are luminescent. | b. | They contain bright yellow
pigments. | c. | They possess pillbox-shaped cell walls of silica. | d. | They can be both
photosynthetic and heterotrophic. |
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26.
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What important role do funguslike protists play in an ecosystem?
a. | blight | c. | decomposer | b. | photosynthesizer | d. | pathogen |
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27.
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Which of the following structures would NOT be found in a Euglenophyte?
a. | eyespot | b. | cell wall | c. | flagellum | d. | pellicle |
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28.
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What effect does a red tide have on humans?
a. | Eating poisoned shellfish from affected waters can cause sickness and death to
humans. | b. | The protists help clean up wastes discharged by local sewage
pipes. | c. | It is unhealthy to swim in the ocean during a red tide. | d. | All the fish in the
area die, causing local fishermen to lose money. |
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29.
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Red algae lack flagella and
a. | centrioles. | c. | chlorophyll. | b. | nuclei. | d. | accessory
pigments. |
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30.
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What effect did the evolution of different forms of chlorophyll in algae
have?
a. | no effect on the range of depths at which algae can live | b. | a reduction in the
photosynthetic capacity of algae | c. | an increase in the range of depths at which
algae can live | d. | a decrease in the range of depths at which algae can
live |
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31.
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In oomycetes, sexual reproduction takes place in the
a. | zoosporangium. | c. | sporangium. | b. | migrating colony. | d. | antheridium and
oogonium. |
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Modified True/False Indicate
whether the statement is true or false. If false, change the identified word or phrase to make the
statement true.
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32.
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Unlike many others in the same phylum, the spores of the Myxomycota that
caused potato blight in nineteenth-century Ireland are airborne. _________________________
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33.
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There are four types of chlorophyll, which are able to absorb different
wavelengths of light. _________________________
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34.
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Blooms of dinoflagellates can cause red tides.
_________________________
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35.
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Unlike fungi, water molds produce flagellated spores.
_________________________
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36.
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Ciliates use flagella for feeding and movement.
_________________________
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37.
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Funguslike protists are autotrophs. _________________________
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38.
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Slime molds are funguslike protists that play key roles in recycling
organic matter. _________________________
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39.
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Dried Porphyran, called nori in Japanese, is a green alga.
_________________________
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40.
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Protists are a diverse group of mainly multicellular eukaryotes.
_________________________
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41.
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The holdfast of a brown alga helps keep it upright in the water.
_________________________
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42.
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A high level of certain toxins found in filter feeders, such as clams, may be a
sign that an algal bloom has occurred. _________________________
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43.
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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. _________________________
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44.
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The cell walls of diatoms are rich in cellulose.
_________________________
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45.
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Chlamydomonas produces male and female gametes.
_________________________
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46.
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Members of the phylum Rhodophyta contain the accessory pigment
phycobilin. _________________________
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Completion Complete each
statement.
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47.
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Because algae undergo ________________________, they produce much of
Earth’s atmospheric oxygen.
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48.
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A fish-eating bear indirectly relies on _________________________ protists for
food.
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49.
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____________________ protists are heterotrophs that absorb nutrients from dead
or decaying organic matter.
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50.
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Close examination of a colony of individuals of the phylum Acrasiomycota would
reveal that they retain their ____________________, unlike organisms of the phylum Myxomycota.
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51.
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In Ulva, the haploid reproductive cells are called spores; these are
analogous to the ____________________ of Chlamydomonas.
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Short Answer
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52.
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What is the function of chlorophyll and accessory pigments in algae?
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53.
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To what features in plants are the holdfast, stipes, and blades of a brown algae
similar? How does a brown algae remain upright in the water?
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54.
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List one way that water molds can be helpful to people and one way they can be
harmful.
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55.
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What is the primary difference between cellular slime molds and acellular slime
molds?
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56.
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What is the advantage to algae of having forms of chlorophyll other than
chlorophyll a?
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