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Bio I Ch. 20 Test A

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
Multicellular protists are grouped with unicellular protists because multicellular protists
a.
do not resemble plants.
c.
do not resemble fungi.
b.
do not resemble animals.
d.
are so similar to unicellular protists.
 

 2. 
According to biologist Lynn Margulis, eukaryotic cells may have evolved from
a.
a symbiosis of several cells.
b.
mitochondria that grew very large.
c.
chloroplasts that grew very large.
d.
plants, animals, and fungi.
 

 3. 
Many zooflagellates live in lakes and streams, where they
a.
penetrate and live within cells of a host.
b.
absorb food through their cell membranes.
c.
feed by sweeping food particles into their gullet.
d.
feed by surrounding their meal and taking it inside themselves.
 

 4. 
Which of the following diseases does the animallike protist known as Entamoeba cause?
a.
malaria
c.
amebic dysentery
b.
African sleeping sickness
d.
potato blight
 

 5. 
As sunlight passes through sea water, the sea water
a.
absorbs large amounts of red and violet wavelengths.
b.
reflects large amounts of red and violet wavelengths.
c.
absorbs large amounts of blue wavelengths.
d.
none of the above
 

 6. 
What effect did the evolution of different forms of chlorophyll have in algae?
a.
a decrease in the range of depths at which algae can live
b.
an increase in the range of depths at which algae can live
c.
no effect on the range of depths at which algae can live
d.
a reduction in the photosynthetic capacity of algae
 

 7. 
Which of the statements is true about dinoflagellates?
a.
They contain bright yellow pigments.
b.
They can be both photosynthetic and heterotrophic.
c.
Many species are luminescent.
d.
They possess pillbox-shaped cell walls of silica.
 

 8. 
The population of small, photosynthetic organisms found near the surface of the ocean are called
a.
chrysophytes.
c.
phytoplankton.
b.
pyrophytes.
d.
diatoms.
 

 9. 
What characteristic of green plants is shared by green algae?
a.
cell wall composition
c.
multicellularity
b.
photosynthetic pigments
d.
all of the above
 

 10. 
Red algae lack flagella and
a.
nuclei.
c.
accessory pigments.
b.
centrioles.
d.
chlorophyll.
 

 11. 
In the life cycle of the green alga Ulva, the phase that produces male and female gametes is known as a
a.
sporophyte.
c.
spore.
b.
gametophyte.
d.
zoospore.
 

 12. 
Some products derived from algae include
a.
drugs for stomach ulcers and high blood pressure.
b.
thickeners for food.
c.
chemicals in plastics, waxes, paints, and lubricants.
d.
all of the above
 

 13. 
Funguslike protists get nutrients by
a.
photosynthesis.
b.
living as an animal parasite.
c.
absorbing them from dead or decaying matter.
d.
none of the above
 

 14. 
In oomycetes, sexual reproduction takes place in the
a.
migrating colony.
c.
antheridium and oogonium.
b.
sporangium.
d.
zoosporangium.
 

 15. 
The work of funguslike protists and other decomposers is important in improving the quality of
a.
salt water.
c.
topsoil.
b.
fresh water.
d.
potato crops.
 

Completion
Complete each statement using the following word bank.
photosynthesis        dinoflagellates       pseudopods         oomycetes       chlorophyll a
 

 16. 
Animallike protists that use structures called ____________________ for movement and for feeding are members of the phylum Sarcodina.
 

 

 17. 
Many members of the phylum Pyrrophyta, which are also referred to as _________________________, are luminescent.
 

 

 18. 
Red algae contain reddish accessory pigments as well as ____________________, one of the three types of chlorophyll.
 

 

 19. 
Because algae carry out ____________________, they produce much of Earth’s atmospheric oxygen.
 

 

 20. 
The funguslike protists that cause several serious plant diseases, including mildews and blights of grapes and tomatoes, are the ____________________.
 

 



 
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