Deck 8: Animal-Like Protists: the Protozoa

Question 1

In a protist,the portion of the cytoplasm that lies just beneath the plasma membrane is called the

A)cell wall.
B)cell membrane.
C)hypoplasm.
D)endoplasm.
E)ectoplasm.

Answer 1

E

Question 2

Protists are believed to have arisen about __________ years ago.

A)100 billion
B)10 billion
C)1.5 billion
D)100 million
E)10 million

Answer 2

C

Question 3

Protists in this supergroup are amoeboid in morphology and have very fine pseudopodia called filopodia that are supported by axopodia.

A)Excavata
B)Amoebozoa
C)Rhizaria
D)Chromalveolata
E)Actinopoda

Answer 3

C

Question 4

The common means of sexual reproduction among ciliated protists is

A)budding.
B)fragmentation.
C)schizogony.
D)conjugation.
E)multiple fission.

Question 5

In protists,both gas exchange and excretion occur by __________ across the plasma membrane.

A)endocytosis
B)active transport
C)diffusion
D)exocytosis
E)facilitated diffusion

Question 6

Egestion vacuoles release their contents by

A)simple diffusion.
B)osmosis.
C)active transport.
D)facilitated diffusion.
E)exocytosis.

Question 7

The protozoan Trypanosoma brucei is the causal organism of the disease

A)African sleeping sickness.
B)malaria.
C)leishmaniasis.
D)trichina.
E)balantidiasis.

Question 8

In some protists,food may be ingested in a special region,the

A)cytopyge.
B)oral hood.
C)cytopharynx.
D)oral aperture.
E)cytosome.

Question 9

Toxoplasmosis is primarily carried to humans by

A)the tsetse fly.
B)the mosquito.
C)chickens.
D)consumption of contaminated water.
E)cats.

Question 10

The vectors of Trypanosoma are

A)Aedes mosquitoes.
B)all species of flies.
C)tsetse flies.
D)all species of mosquitoes.
E)all species of ticks and mites.

Question 11

__________ is an organism that causes one of the opportunistic diseases affecting AIDS patients in the United States.

A)Trypanosoma
B)Nosema
C)Entamoeba
D)Toxoplasma
E)Plasmodium

Question 12

In heterotrophic protists,digestion and transport of food occurs in

A)ingestion vacuoles.
B)contractile vacuoles.
C)egestion vacuoles.
D)food vacuoles.
E)cytopygial vacuoles.

Question 13

The principal nitrogenous waste of protozoans is

A)guanine.
B)ammonia.
C)urea.
D)uric acid.
E)urine.

Question 14

__________ occurs in protists when a large number of daughter cells are formed from a single parent cell.

A)Multiple mitosis
B)Fragmentation
C)Budding
D)Binary fission
E)Schizogony

Question 15

Because protist groups cannot be traced back to a single common ancestor the group is considered to be

A)polygynous.
B)polyphyletic.
C)holophytic.
D)autotrophic.
E)monophyletic.

Question 16

The most recent classification scheme put forth by the International Society of Protistologists places protists into six

A)phyla
B)classes
C)kingdoms
D)supergroups
E)genera

Question 17

Pseudopodia that are broad and are used for locomotion and engulfing food are called

A)lobopodia.
B)filipodia.
C)reticulopodia.
D)axopodia.
E)amphipodia.

Question 18

Contractile vacuoles in freshwater protozoans function to

A)remove excess water.
B)remove the nitrogenous by-products of metabolism.
C)capture prey.
D)increase the efficiency of movement.
E)destroy infectious bacteria.

Question 19

Egestion vacuoles release their contents through the

A)cytopyge.
B)oral pore.
C)anus.
D)cytopharynx.
E)mouth.

Question 20

"Red-tides" are caused by

A)radiolarians.
B)foraminiferans.
C)sporozoans.
D)volvicines.
E)dinoflagellates.

Question 21

In the ciliates,one or more __________ serve as the genetic reserve of the cell.

A)macronuclei
B)polyploid nuclei
C)triploid nuclei
D)heteroploid nuclei
E)micronuclei

Question 22

Many __________ are symbiotic in the digestive tracts of ruminant ungulates (hoofed mammals),and aid in digestion for their hosts.

A)euglenoids
B)trypanosomes
C)amoebae
D)sporozoans
E)ciliates

Question 23

Sexual reproduction of ciliates involves a process called

A)conjugation.
B)gametogony.
C)sporogony.
D)cohabitation.
E)copulation.

Question 24

Protozoans in this group are nearly all parasites of humans.

A)Apicomplexans
B)Dinoflagellates
C)Ciliophorans
D)Formaniferans
E)Tubulineans

Question 25

Some of the oldest eukaryotic fossils are

A)difflugians.
B)radiolarians.
C)arcellians.
D)heliozoans.
E)bacteria.

Question 26

All ciliates have a large __________ nucleus that controls normal functions.

A)diploid
B)polyploid
C)haploid
D)monoploid
E)heteroploid

Question 27

Members of the genus Amoeba ingest food by

A)absorption.
B)active transport.
C)phagocytosis.
D)exocytosis.
E)facilitated diffusion.

Question 28

A(n)________ protozoan would possess a lobopodium.

A)Euglena
B)Dinoflagellate
C)Sporozoan
D)Amoeba
E)Ciliated

Question 29

Ancient records indicate humans were infected with which parasite?

A)Toxoplasma.
B)Isospora.
C)Trypanosoma.
D)Eimeria.
E)Plasmodium.

Question 30

A process known as __________ begins the sexual phase of the apicomplexans life cycle.

A)exogeny
B)schizogeny
C)endogeny
D)gametogeny
E)sporogeny

Question 31

An important parasitic ciliate that lives in the large intestines of humans,pigs,and other mammals is

A)Entamoeba gingivalis.
B)Trypanosoma brucei.
C)Balantidium coli.
D)Plasmodium falciparum.
E)Entamoeba histolytica.

Question 32

The white cliffs of Dover are an example of a/an __________ chalk deposit.

A)foraminiferan
B)radiolarian
C)heliozoan
D)difflugian
E)arcellian

Question 33

Ciliates have a distinct "cell mouth" called a

A)protostome.
B)cytostome.
C)picnostome.
D)phagostome.
E)cytopore.

Question 34

Of the protozoans listed below,which one is capable of photosynthesis?

A)Giardia
B)Toxoplasma
C)Euglena
D)Trypanosoma
E)Plasmodium

Question 35

The pathogenic amoeba that causes dysentery in humans is

A)Entamoeba gingivalis.
B)Amoeba proteus.
C)Entamoeba coli.
D)Amoeba difflugia.
E)Entamoeba histolytica.

Question 36

Which of the following explains why precise evolutionary relationships are difficult to determine for the protozoa?

A)The fossil record is sparse.
B)What fossils do exist, are not helpful.
C)There is no ribosomal sequence comparisons available.
D)Both A and B

Question 37

An economically important disease of poultry is

A)trypanosomiasis.
B)pebrine.
C)foul brood.
D)coccidiosis.
E)sarcocystitis.