Chapter Quiz
1.  

Protists are a diverse group of organisms that includes _____. (p. 546)


plants

algae

protozoans

fungi

algae and protozoans


2.  

The kingdom Protista causes dissatisfaction among taxonomists mainly because ____________. (p. 546)


it has both autotrophic and heterotrophic members

protistan organelles are prokaryotes rather than real, eukaryotic organelles

various pieces of evidence indicate that the Protista are not monophyletic

various pieces of evidence indicate that the Protista are not polyphyletic

of all of these


3.  

Which of the following is NOT evidence for the role of endosymbiosis in the origin of eukaryotes? (p. 549)


Chloroplasts have their own DNA.

The inner membrane of a chloroplast is similar to prokaryotic membranes.

Mitochondria and chloroplasts are surrounded by two membranes.

Mitochondria reproduce by binary fission.

The DNA in the eukaryotic nucleus codes for some enzymes in mitochondria.


4.  

The euglenoids could be said to bridge the evolutionary gap between plantlike protists and animal-like protists. This is because they have some characteristics of each group. For example, they __________. (p. 555)


have a cell wall but also have flagella

have true roots, stems, and leaves

have a cell wall but carry on photosynthesis

carry on photosynthesis but have flagella and lack a cell wall

have a cell wall but do not carry on photosynthesis


5.  

What do a carnivorous dinoflagellate, a parasitic apicomplexan, and Paramecium have in common? (p. 556)


All three are heterotrophic and autotrophic.

All three form colonies of cells.

All three are parasitic on other species of organisms.

All three have alveoli under their cell surfaces.

All three are photosynthetic.


6.  

Which organisms are capable of producing a "red tide"? (p. 556)


dinoflagellates

chrysophytes (diatoms)

sporozoans

euglenoids

none of the above.


7.  

A clade of protists consisting entirely of parasitic organisms is the _____. (p. 557)


amoebas

ciliates

euglenoids

flagellates

apicomplexans


8.  

Plasmodium is a protozoan parasite that causes malaria. Scientists have recently made a discovery that may help overcome drug resistance in Plasmodium. That discovery is _________. (p. 558)


the development of antibiotics that effectively kill the organism

the identification of the gene for resistance to chloroquine

a chemical that kills the Anopheles mosquito, the parasite's host

a foolproof way to avoid infection by Plasmodium and therefore make drug resistance a moot point

that drug resistance is not a problem with Plasmodium


9.  

A student is looking at a protist under the microscope. "I know it's supposed to be a ciliate, a flagellate, or an amoeba, but how am I supposed to know which it is?" she complains to her lab partner. "Easy," her partner says. "Just __________." (p. 555)


watch and see what it eats

see whether it has a nucleus

watch how it moves

measure how big it is

look at its chloroplasts


10.  

Which one of the following organisms is commercially harvested to extract algin from their cell walls? (p. 563)


dinoflagellates

chrysophytes (diatoms)

phaeophytes (brown algae)

rhodophytes (red algae)

none of the above


11.  

The chief use of the algal product algin is as a(n) _____. (p. 563)


thickener in processed foods

garden mulch in organic gardening

fertilizer in organic gardening

natural antibiotic

fine abrasive for scouring agents


12.  

Agar is a complex carbohydrate used in gelatin capsules and also in cooking. It is derived from cell walls of _____. (p. 563)


chlorophytes

phaeophytes

euglenozoans

rhodophytes

mycophytes


13.  

The general term given to a plant body that lacks stems, leaves, and roots and that shows little tissue differentiation is _______. (p. 562)


stipe

rhizoid

strobilus

thallus

gametophyte


14.  

How do trypanosomes withstand the attack of a host's immune system? (p. 556)


They reproduce so fast that they can compensate for the death rate caused by the immune system.

They live only in the cerebrospinal fluid, where the immune system can't reach them.

They specifically poison helper T cells.

The molecular composition of their coat keeps changing.

All of the above.


15.  

The red algae are characterized by _____. (p. 565)


alternation of generations in some species

flagellated gametes that do not require water for fertilization to occur

multicellularity and a differentiation of tissues

multinucleated portions

a red coloration in all its species


16.  

Many members of the red algae are adapted to deeper water because _____. (p. 565)


their red pigments readily absorb red light

their cell walls are adapted to withstand bright light

their photosynthetic pigments efficiently absorb blue light

they grow long stalks with floats on the ends to hold the blades near the surface

they are adapted to floating free on the surface


17.  

The algal groups most commonly found in freshwater ecosystems are __________. (p. 560)


brown algae and chlorophytes

red algae and brown algae

chlorophytes and diatoms

dinoflagellates and diatoms

none of these


18.  

Which of the following groups of algae are most closely related to higher plants? (p. 565)


phaeophytes (brown algae)

chlorophytes

rhodophytes (red algae)

all of the above

none of the above


19.  

Which of these groups is characterized by cells that have more than one nucleus? (p. 558)


diatoms

dinoflagellates

euglenoids

ciliates

apicomplexans


20.  

The asexual cycle of the unicellular alga Chlamydomonas involves _____________. (p. 566)


mitosis

mitosis and fertilization

meiosis and mitosis

meiosis and fertilization

meiosis, mitosis, and fertilization


21.  

Some chlorophytes, like Spirogyra, have a unique form of sexual reproduction in which free-swimming gametes are not produced. Instead, two adjacent strands of cells fuse together and cells of one strand move into the cell walls of the adjacent strand. This is called _________. (p. 559)


budding

aggregation

fruiting body formation

conjugation

plasmid exchange


22.  

Actinopods feed by ____________. (p. 569)


paralyzing small animals with toxic darts

absorbing dissolved organic matter

digesting organic material with enzymes secreted outside their cells

catching small organisms and organic particles on slender axopodia

pili


23.  

In lab class a plasmodial slime mold is used as a demonstration organism. One of the students does not understand why this visible mass of life is not considered multicellular. How would you explain it to her? (p. 570)


The mass of protoplasm is undivided by membranes and contains many nuclei; therefore, it is not technically multicellular.

The distinct cells that make up the mass of protoplasm do not cooperate, so they do not represent a truly multicellular organism.

Plasmodial slime molds are not able to reproduce sexually, so therefore they are not truly multicellular.

Multicellular organisms are seen only in the kingdoms Animalia and Plantae.

The nuclei found in the protoplasm of a plasmodial slime mold are diploid.


24.  

Some protozoans, such as Amoeba and Paramecium, have special organelles that continually eliminate excess water from the cell. The presence of these organelles tells you that the protozoan is adapted to live in _________. (p. 558)


a terrestrial environment

human blood

a freshwater environment

the ocean

a hypertonic environment


25.  

Which of the following is most likely to thrive in the ocean, floating near the water's surface? (p. 570)


Paramecium

heliozoans

Plasmodium

radiolarians

foraminiferans


26.  

Consider the following kinds of organisms: dinoflagellates, ciliates, and euglenoids. All of these organisms belong to which one of the following groups? (p. 555)


Protista

animal-like Protista

plantlike Protista

Monera

Archaea


27.  

Which of these groups includes unicellular organisms with unique overlapping cell walls? (p. 560)


diatoms

dinoflagellates

euglenoids

ciliates

apicomplexans


28.  

Which of these groups includes photosynthetic unicellular organisms with flagella and contractile vacuoles? (p. 560)


diatoms

dinoflagellates

euglenoids

ciliates

apicomplexans


29.  

Which of these groups includes parasitic unicellular organisms with a complex of organelles specialized for penetrating host cells and tissues? (p. 557)


diatoms

dinoflagellates

euglenoids

ciliates

apicomplexans


30.  

Which of these groups has cells with walls made of silica? (p. 560)


diatoms

dinoflagellates

euglenoids

ciliates

apicomplexans


31.  

Which of these groups includes species that produce a nerve agent toxic to humans? (p. 556)


diatoms

dinoflagellates

euglenoids

ciliates

apicomplexans

   



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