Deck 25: The Protists

Question 1

All photosynthetic protists

A)carry out oxygenic photosynthesis using two photosystems.
B)carry out oxygenic photosynthesis using one photosystem.
C)carry out anoxygenic photosynthesis using two photosystems.
D)carry out anoxygenic photosynthesis using one photosystem.

Answer 1

A

Question 2

A typical Euglena cell is elongated and bounded by a _________________

A)protuberance.
B)pellicle.
C)cytoproct.
D)plasmalemma.
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Answer 2

D

Question 3

The pellicle of a Euglena cell consists of

A)glycoprotein.
B)polysaccharide.
C)peptidoglycan.
D)protein strips and microtubules.
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Answer 3

D

Question 4

Trypanosomes that cause disease in humans escape destruction by the human immune system because they are resistant to phagocytosis.

Question 5

The most common method of asexual reproduction in protists is

A)budding.
B)cytokinesis.
C)fission.
D)fragmentation.
Blooms Level: 1.Remember
Learning Outcome: 25.01.05 Compare binary fission as it occurs in a protist with that in a bacterium or archaeon
Section: 25.01

Question 6

Some anaerobic protists obtain energy using

A)mitochondria.
B)cytochromes.
C)hydrogenosomes.
D)all of the choices

Question 7

The simultaneous use of both organic and inorganic forms of carbon is called

A)osmotrophy.
B)omnitrophy.
C)mixotrophy.
D)metatrophy.

Question 8

The cellulase-excreting protist that can account for up to one-third of the biomass of a termite is a member of the genus

A)Hexamida.
B)Trichomonas.
C)Trichonympha.
D)Euglena.

Question 9

Which of the following is rare among protists?

A)motile
B)multicellular
C)eukaryotic
D)none of these characteristics are rare among protists
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Question 10

Which of the following statements is not true of protists?

A)Moisture is absolutely essential to their existence.
B)Most are free living.
C)They make up a substantial fraction of the marine plankton.
D)They are not known to cause diseases of humans.

Question 11

When protists feed on solid nutrients such as bacteria by phagocytosis,they are said to be using ____________ nutrition.

A)saprozoic
B)holozoic
C)endozoic
D)parasitic
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Question 12

Unlike Giardia,most members of the Fornicata are harmless symbionts.

Question 13

Acellular slime molds form a large multinucleate mass called a(n)______________.
Blooms Level: 1.Remember
Learning Outcome: 25.03.03 Compare and contrast the structure,motility,and life cycles of acellular and cellular slime molds
Section: 25.03

Question 14

Recent evidence suggests that hydrogenosomes and mitochondria evolved from different endosymbiotically derived organelles.

Question 15

Which of the following is found in the intestine of termites and produces enzymes needed to digest wood particles?

A)Giardia
B)Trichomonas
C)Trichonymphida
D)Nyctotherus
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Question 16

The study of algae is referred to as

A)phycology.
B)phytology.
C)mycology.
D)none of the choices
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Question 17

Pigment is contained in an eyespot or __________ that helps certain organisms orient to light.
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Question 18

Euglena use a contractile vacuole for osmotic regulation.
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Question 19

Which of the following is a unique organelle found within some protists but not in higher animal cells?

A)mitochondrion
B)contractile vacuole
C)Golgi apparatus
D)endoplasmic reticulum

Question 20

A trophozoite is a life cycle stage involved in

A)dormancy.
B)nutrient gathering and growth.
C)passage between hosts.
D)sexual reproduction.

Question 21

Diatoms

A)are photosynthetic with frustules composed of two halves.
B)can reproduce asexually.
C)are motile by virtue of having flagella.
D)are photosynthetic with frustules composed of two halves and can reproduce asexually.
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Question 22

The Stramenopila are a very large and diverse group that all possess __________ at some point in their life cycle.

A)a macronucleus
B)chloroplasts
C)an exoskeleton
D)heterokont flagella
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Question 23

Which of the following is not a type of pseudopod found in protozoa?

A)lobopodia
B)peripodia
C)reticulopodia
D)filopodia
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Question 24

A cyst formed by a protist functions

A)as a protective mechanism against adverse changes in the environment.
B)in repair of damage to the cell envelope.
C)in transfer from one host to the next.
D)as a protective mechanism against adverse changes in the environment and in transfer from one host to the next.
Blooms Level: 2.Understand
Learning Outcome: 25.03.03 Compare and contrast the structure,motility,and life cycles of acellular and cellular slime molds
Section: 25.03

Question 25

Most radiolaria have an internal skeleton made of

A)microtubules.
B)glycoproteins.
C)cellulose.
D)siliceous material.
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Question 26

Some ciliophora can discharge toxic threadlike darts called ___________ which are used in capturing prey.

A)spikes
B)spicules
C)toxicysts
D)toxipodia
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Question 27

Diatoms have a distinctive two-piece wall of silica called a frustule.
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Question 28

__________ from foraminifera make up the White Cliffs of Dover and the stones used to build the great pyramids.
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Question 29

Foraminifera are a type of protist that

A)help in estimating the age of ocean deposits.
B)move by means of flagella.
C)cause malaria.
D)are associated with human disease.

Question 30

A protist with two flagella where one is wrapped around a transverse groove and the other is drapped in a longitudinal grove would be a member of which group?

A)ciliophora
B)dinoflagellate
C)trypanosome
D)oomycetes
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Question 31

Apicomplexan organisms such as Plasmodium possess a motile,infective stage called the

A)sporozoite.
B)trophozoite.
C)apizoite.
D)none of the choices.
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Question 32

Filopodia supported by microtubules that are used primarily in feeding are called

A)lobopodia.
B)reticulopodia.
C)axopodia.
D)micropodia.
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Question 33

Which of the following groups is responsible for toxic red tides?

A)dinoflagellates
B)diatoms
C)trypanosomes
D)foraminifera

Question 34

Species of dinoflagellates are responsible for much of the phosphorescence seen in ocean waters at night.

Question 35

Those dinoflagellates that live in an intimate association with corals are called

A)zooxanthellae.
B)parasites.
C)lichens.
D)phytoplankton.

Question 36

Protist cells that produce gametes for sexual reproduction are most specifically called ___________.
Blooms Level: 1.Remember
Learning Outcome: 25.01.06 Outline the process of sexual reproduction and how it can vary in protists
Section: 25.01

Question 37

_____________ produce 40 to 50 percent of the organic carbon in the ocean.

Question 38

Which of the following is not true regarding Entamoeba histolytica?

A)Entamoeba histolytica always remains in the intestinal tract during an infection.
B)Entamoeba histolytica cysts pass through the stomach unharmed.
C)Entamoeba histolytica grazes on bacteria in the intestines.
D)Entamoeba histolytica produces enzymes that degrade epithelial tissue.
Blooms Level: 1.Remember
Learning Outcome: 25.03.03 Compare and contrast the structure,motility,and life cycles of acellular and cellular slime molds
Section: 25.03

Question 39

An organelle similar to a flagellum that differs from a flagellum in the arrangement of microtubules is called a(n)

A)haptonema.
B)uronema.
C)cilileum.
D)propellium.
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Question 40

Sexual reproduction in the cellular slime mold Dictyostelium discoideum involves the production of special spores called

A)amoeba flagellates.
B)macrocysts.
C)sporozoites.
D)discoidia.
Blooms Level: 1.Remember
Learning Outcome: 25.03.03 Compare and contrast the structure,motility,and life cycles of acellular and cellular slime molds
Section: 25.03

Question 41

Ciliate sexual reproduction by conjugation differs from sexual reproduction in most animals in that

A)both parents are converted into zygotes.
B)meiosis occurs in both partners.
C)cell fusion occurs during fertilization.
D)the zygotic nucleus is diploid.
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Question 42

The Chloroplastida (green algae)include a wide diversity of forms ranging from unicellular to colonial individuals.
Blooms Level: 1.Remember
Learning Outcome: 25.06.01 List at least three different morphologies found among the Chloroplastida
Section: 25.06

Question 43

In labyrinthulids,the nonflagellated stage of the life cycle features spindle-shaped cells that form complex colonies that glide rapidly along an ______________ net made by the organism.

A)ectoplasmic
B)endoplasmic
C)protoplasmic
D)pellicular
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Question 44

Which of the following ciliates produces the disease ick in fish?

A)Entodinium
B)Nyctotherus
C)Ichthyophthirius
D)Balantidium

Question 45

Protothecosis is an infection of humans or animals that is caused by a chlorophyte (green algae).

Question 46

If plants originated from an organism like Chlamydomonas,then the origin of plants involved the loss of

A)chloroplasts.
B)microtubules.
C)cell walls.
D)flagella.

Question 47

The apical complex in the apicomplexans

A)is located at one end of the cell.
B)aids in penetration of host cells.
C)contains mitochondria.
D)is located at one end of the cell and aids in penetration of host cells.
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Question 48

Which of the following apicomplexan genera cause coccidiosis in chickens?

A)Pneumocystis
B)Eimeria
C)Plasmodium
D)Toxoplasma
Blooms Level: 1.Remember
Learning Outcome: 25.05.07 List at least two human diseases caused by apicomplexans
Section: 25.05

Question 49

Which of the following is not true of the Chloroplastida (green algae)?

A)Their cell walls contain chitin.
B)They are found in fresh and salt water.
C)They have chlorophylls a and b.
D)They store carbohydrates as starch.
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