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1 | |
Cilia and flagella have similar internal structures, but their _________ is/are different.
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| | A) | length and number
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| | B) | placement
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| | C) | microfilaments
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| | D) | color
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2 | |
The sliding microtubule hypothesis explains
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| | A) | kinetosome structure.
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| | B) | pseudopodal action.
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| | C) | endosymbiosis.
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| | D) | ciliary and flagellar action.
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3 | |
Most of the sarcodines and flagellates reproduce by
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| | A) | autogamy.
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| | B) | schizogony.
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| | C) | budding.
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| | D) | binary fission.
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4 | |
A resistant, quiescent stage in the life cycle of a protozoan is called a
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| | A) | sporozoite.
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| | B) | gamete.
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| | C) | cyst.
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| | D) | merozoite.
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5 | |
The agents of red tide, which may be red, brown, yellow, or colorless, are the
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| | A) | dinoflagellates.
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| | B) | radiolarians.
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| | C) | foraminiferans.
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| | D) | ciliophorans.
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6 | |
African sleeping sickness and Chagas's disease are both caused by protozoa in the
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| | A) | genus (Noctiluca).
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| | B) | genus (Plasmodium).
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| | C) | genus (Toxoplasma).
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| | D) | genus (Trypanosoma).
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7 | |
Mental retardation of a child can be caused by infection of its mother by during the child's fetal development. This may be the simple result of the mother changing a cat litter box while pregnant.
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| | A) | the protistan (Noctiluca)
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| | B) | the protistan (Plasmodium)
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| | C) | the protistan (Toxoplasma)
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| | D) | the protistan (Trypanosoma)
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8 | |
The agent of malaria, which kills one million people each year globally, is
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| | A) | the protistan (Noctiluca)
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| | B) | the protistan (Plasmodium)
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| | C) | the protistan (Toxoplasma)
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| | D) | the protistan (Trypanosoma)
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9 | |
Some sarcodines make a protective shell or test. Those that construct this shell of calcium carbonate are the
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| | A) | dinoflagellates.
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| | B) | radiolarians.
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| | C) | foraminiferans.
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| | D) | ciliophorans.
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10 | |
Sarcodines that construct their shell or test of siliceous material, and are also found in fresh waters are the
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| | A) | dinoflagellates.
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| | B) | radiolarians.
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| | C) | foraminiferans.
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| | D) | ciliophorans.
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11 | |
While many sarcodines are heterotrophic, a few are endoparasites. The agent of amoebic dysentery is
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| | A) | the protistan Plasmodium vivax.
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| | B) | the protistan Toxoplasma gondii.
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| | C) | the protistan Entamoeba histolytica.
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| | D) | the protistan Trypanosoma brucei.
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12 | |
The members of phylum Apicomplexa share two features, which are
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| | A) | flagella and cyst formation.
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| | B) | an apical complex and endoparasitism.
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| | C) | endoparasitism and flagella.
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| | D) | cyst formation and an apical complex.
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13 | |
Which of the following disease agents does a vector mosquito transmit?
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| | A) | the protistan Plasmodium vivax.
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| | B) | the protistan Toxoplasma gondii.
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| | C) | the protistan Entamoeba histolytica.
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| | D) | the protistan Trypanosoma brucei.
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14 | |
The members of phylum Ciliophora usually have cilia but the one trait that characterizes them is being
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| | A) | motile.
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| | B) | free living.
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| | C) | multinucleate.
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| | D) | smaller than other protists.
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15 | |
The members of phylum Ciliophora have complex reproductive cycles, but they usually include
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| | A) | conjugation and autogamy.
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| | B) | sporogony and fission.
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| | C) | autogamy and sporogony.
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| | D) | fission and conjugation.
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16 | |
Which of the following is not a form of asexual reproduction used by protists?
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| | A) | fission
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| | B) | budding
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| | C) | conjugation
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| | D) | schizogony
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17 | |
The infective stage in the life cycle of a sporozoan is the
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| | A) | oocyst.
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| | B) | sporocyst.
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| | C) | merozoite.
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| | D) | trophozoite.
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18 | |
When cilia are fused into a sheet of material that can be used for locomotion or for moving food particles toward the cytopharynx, the sheet is called
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| | A) | an infraciliature.
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| | B) | an undulating membrane.
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| | C) | a flagella.
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| | D) | a pellicle.
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19 | |
Another term for the joining of two gametes is
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| | A) | sporogony.
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| | B) | autogamy.
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| | C) | conjugation.
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| | D) | syngamy.
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20 | |
Among the Ciliophora, the surface is called a pellicle. The ________ are pellicular structures that primarily are used for attachment.
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| | A) | membranelles
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| | B) | cirri
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| | C) | kinetosomes
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| | D) | trichocysts
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21 | |
Unlike most of the other kinds of protists, the __________ exist in a diploid state most of the life cycle and meiosis precedes syngamy.
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| | A) | phytoflagellates
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| | B) | sarcodines
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| | C) | ciliates
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| | D) | zooflagellates
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22 | |
A process known as _________ begins the sexual phase of the typical sporozoan life cycle, such as in the life cycle of Plasmodium.
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| | A) | exogeny
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| | B) | schizogony
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| | C) | gametogeny
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| | D) | sporogony
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23 | |
Some of the oldest known fossils of eukaryotic organisms that have been identified are members of the group called
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| | A) | difflugians.
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| | B) | radiolarians.
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| | C) | arcellians.
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| | D) | dinoflagellates.
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24 | |
The type of movement that is facilitated by pseudopodia is called ameboid movement.
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| | A) | True
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| | B) | False
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25 | |
The arrangement of microtubules within a flagella is similar to the internal structure of another organelle, the mitochondrion.
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| | A) | True
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| | B) | False
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26 | |
Contractile vacuoles are mainly functional in regulating water within the cell, and are most active in freshwater protozoans.
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| | A) | True
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| | B) | False
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27 | |
Respiration exchanges in protists occur via specialized membranous organelles.
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| | A) | True
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| | B) | False
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28 | |
Lobopodia are large and blunt, contain both endoplasm and ectoplasm, and are used in ameboid movement.
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| | A) | True
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| | B) | False
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29 | |
Zygotic meiosis is meiosis that occurs after fertilization such as in Apicomplexa.
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| | A) | True
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| | B) | False
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30 | |
Intermediary meiosis is meiosis that occurs between haploid and diploid generations such as in foraminiferans.
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| | A) | True
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| | B) | False
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31 | |
Conjugation is when gametic nuclei are exchanged between individuals such as inPlasmodium.
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| | A) | True
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| | B) | False
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32 | |
It is believed that the green algae gave rise to multicellular plants.
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| | A) | True
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| | B) | False
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33 | |
Endosomes are structures found in the nucleus of some protozoans, and are nucleoli that persist during mitosis.
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| | A) | True
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| | B) | False
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34 | |
Undulipodia is the term that has been given to the various types of pseudopodia.
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| | A) | True
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| | B) | False
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35 | |
One difference between pseudopodia and flagella and cilia is that pseudopodia are bound by the cell membrane, whereas flagella and cilia are naked extensions of microtubules.
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| | A) | True
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| | B) | False
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36 | |
Multiple fission is common in the sporozoans and some sarcodinians, and is also known as schizogony.
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| | A) | True
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| | B) | False
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37 | |
If a protozoan produces gametes that are morphologically similar, they are called anisogametes.
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| | A) | True
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| | B) | False
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38 | |
The amebas, Plasmodium, Paramecium, and Euglena all belong to different phyla.
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| | A) | True
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| | B) | False
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39 | |
Many species of foraminiferans live in a close symbiotic relationship with stony corals, and are very important in the formation and maintenance of coral reefs.
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| | A) | True
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| | B) | False
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40 | |
Toxoplasmosis typically does not cause disease symptoms in healthy humans, but may pose a threat to HIV-infected persons, the elderly, and pregnant women.
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| | A) | True
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| | B) | False
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