Question 1

Dictyostelium discoideum is an unusual organism,one that straddles the boundary between the unicellular and the multicellular.Its feeding phase consists of individual amoeba-like cells that move independently,feeding on bacteria by phagocytosis.When the food runs out,cells begin to aggregate into a multicelled structure that migrates toward light.The cells differentiate into a base,stalk,and spores; only the spores survive to colonize a new habitat.What is the advantage of forming spores?

Accepted Answer

A)  The spores will eat the other cells
B)  The spores are photosynthetic
C)  Spores are smaller and can be transported to new habitats
D)  Spores can mate with other species
E)  Spores have flagella and can swim to new habitatsF) A) and E)
G) All of the above

Question 2

Cytoplasmic extensions by which some protozoa move are:

Accepted Answer

A)  Cilia
B)  Flagella
C)  Pseudopodia
D)  Axial filaments
E)  PiliF) C) and D)
G) D) and E)

Question 3

Silica walls are characteristic of:

Accepted Answer

A)  Diatoms
B)  Euglenoids
C)  Red algae
D)  Brown algae
E)  Slime moldsF) A) and B)
G) C) and E)

Question 4

All protists are single-celled.

Accepted Answer

A) True 
 B)False

Question 5

A dinoflagellate has both a transverse flagellum and longitudinal flagellum.

Accepted Answer

A) True 
 B)False

Question 6

figure 17.20 
-In figure 17.20,the plant community changed from alpine tundra grasses to coniferous forest as temperatures warmed up.In this figure lodgepole pines are occupying which of the following?

Accepted Answer

A)  A realized niche
B)  A community
C)  A population
D)  A fundamental niche
E)  A biomeF) A) and B)
G) A) and C)

Question 7

The movement toward a chemical stimulus is called cytokinesis.

Accepted Answer

A) True 
 B)False

Question 8

Sponges:

Accepted Answer

A)  Are the simplest animals
B)  Are plants
C)  Are the most complex protists
D)  Are prokaryotic bacteria
E)  Are not aliveF) B) and C)
G) A) and E)

Question 9

The microscopic food that supports the ocean's vast food webs is:

Accepted Answer

A)  Coral
B)  Plankton
C)  Jellyfish
D)  Organic compounds released by thermal vents in the ocean floor
E)  Bacteria onlyF) B) and C)
G) B) and D)

Question 10

Chloroplasts in algae are thought to have arisen from which source?

Accepted Answer

A)  Cyanobacteria
B)  Aerobic bacteria
C)  Anaerobic bacteria
D)  Photosynthetic viruses
E)  Aerobic fungiF) B) and C)
G) B) and E)

Question 11

In malaria,Plasmodium falciparum grow inside of human cells.As such they are which of the following?

Accepted Answer

A)  Autotrophs
B)  Heterotrophs
C)  Phototrophs
D)  Heterotrophs and autotrophs
E)  Autotrophs and phototrophsF) C) and D)
G) All of the above

Question 12

How might global climate change affect the distribution of malaria?

Accepted Answer

A)  By expanding the range of Plasmodium falciparum
B)  By allowing more people to live in areas where malaria already occurs
C)  By increasing the number of Plasmodium falciparum in each mosquito
D)  By expanding the range of the mosquito
E)  By increasing how fast Plasmodium falciparum grows inside human red blood cellsF) All of the above
G) B) and E)

Question 13

Figure 17.21 
-In Figure 17.21,the authors show pictures of the modern diatoms S.niagarae (a) and S.yellowstonensis (c) as well as a transitional fossil.Which modern species does the transitional fossil most resemble?

Accepted Answer

A)  S. yellowstonensis
B)  S. niagaraeBLOOM'S LEVEL: 4. AnalyzeLEARNING OUTCOME: 12.04.01 Compare and contrast homologous, analogous, and vestigial structures.LEARNING OUTCOME: 17.02.01 Describe the characteristics of euglenoid and dinoflagellate protists.SECTION: 12.04SECTION: 17.06TOPIC: Evolution-SpeciationTOPIC: Investigating LifeTOPIC: ProtistsC) A) and B)
D) undefined

Question 14

Alternation of generations means having alternating multicelled haploid and diploid phases in a life cycle.

Accepted Answer

A) True 
 B)False

Question 15

The engulfment of food particles by a cell is:

Accepted Answer

A)  Chemotaxis
B)  Organotaxis
C)  Pseudopodia
D)  Cytokinesis
E)  PhagocytosisF) None of the above
G) D) and E)

Question 16

African sleeping sickness is caused by Trypanosoma brucei,a unicellular flagellated protist infects red blood cells after being injected into the blood stream.African sleeping sickness is transmitted by:

Accepted Answer

A)  Ingesting food
B)  Contaminated water
C)  Sexual intercourse
D)  The bite of an insect
E)  Exhaled aerosolsF) D) and E)
G) C) and E)

Question 17

Cryptosporidium is an apicomplexian that can contaminate water supplies.Which of the following would you predict to be the case of a Cryptosporidium outbreak?

Accepted Answer

A)  It can only be transmitted by insect bites because it is nonmotile
B)  It can grow in any water supply because it is photosynthetic
C)  It will be difficult to treat with chlorine because it forms spores
D)  It spreads rapidly because it has flagella
E)  It will enter a person's body through their respiratory tractF) C) and D)
G) B) and E)

Question 18

Euglena and dinoflagellates have chloroplasts and flagella.This means they are which of the following?

Accepted Answer

A)  Photosynthetic
B)  Mobile
C)  Multicellular
D)  Photosynthetic and mobile
E)  Multicellular and mobileF) A) and B)
G) B) and C)

Question 19

The largest algae are:

Accepted Answer

A)  Kelp
B)  Diatoms
C)  Red algae
D)  Golden algae
E)  Green algaeF) A) and B)
G) B) and E)

Question 20

Entamoeba histolytica can cause amoebic dysentery.It moves using pseudopodia,can only feed by phagocytosis and is unicellular.Entamoeba histolytica is which of the following?

Accepted Answer

A)  A protozoa
B)  An algae
C)  A slime mold
D)  A diatom
E)  An apicomplexanF) A) and B)
G) C) and D)

Exam 17: Protists

Entamoeba histolytica can cause amoebic dysentery.It moves using pseudopodia,can only feed by phagocytosis and is unicellular.Entamoeba histolytica is which of the following?

Correct Answer
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Silica walls are characteristic of:

Correct Answer
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The largest algae are:

Correct Answer
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Figure 17.21 -In Figure 17.21,the authors show pictures of the modern diatoms S.niagarae (a) and S.yellowstonensis (c) as well as a transitional fossil.Which modern species does the transitional fossil most resemble?

Correct Answer
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Sponges:

Correct Answer
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figure 17.20 -In figure 17.20,the plant community changed from alpine tundra grasses to coniferous forest as temperatures warmed up.In this figure lodgepole pines are occupying which of the following?

Correct Answer
verified

Chloroplasts in algae are thought to have arisen from which source?

Correct Answer
verified

A dinoflagellate has both a transverse flagellum and longitudinal flagellum.

Correct Answer
verified

All protists are single-celled.

Correct Answer
verified

Alternation of generations means having alternating multicelled haploid and diploid phases in a life cycle.

Correct Answer
verified

In malaria,Plasmodium falciparum grow inside of human cells.As such they are which of the following?

Correct Answer
verified

Correct Answer
verified

How might global climate change affect the distribution of malaria?

Correct Answer
verified

The engulfment of food particles by a cell is:

Correct Answer
verified

Euglena and dinoflagellates have chloroplasts and flagella.This means they are which of the following?

Correct Answer
verified

African sleeping sickness is caused by Trypanosoma brucei,a unicellular flagellated protist infects red blood cells after being injected into the blood stream.African sleeping sickness is transmitted by:

Correct Answer
verified

Cytoplasmic extensions by which some protozoa move are:

Correct Answer
verified

The microscopic food that supports the ocean's vast food webs is:

Correct Answer
verified

The movement toward a chemical stimulus is called cytokinesis.

Correct Answer
verified

Cryptosporidium is an apicomplexian that can contaminate water supplies.Which of the following would you predict to be the case of a Cryptosporidium outbreak?

Correct Answer
verified

Exam 17: Protists

Entamoeba histolytica can cause amoebic dysentery.It moves using pseudopodia,can only feed by phagocytosis and is unicellular.Entamoeba histolytica is which of the following?

Correct AnswerverifiedShow Answer

Silica walls are characteristic of:

Correct AnswerverifiedShow Answer

The largest algae are:

Correct AnswerverifiedShow Answer

Figure 17.21 -In Figure 17.21,the authors show pictures of the modern diatoms S.niagarae (a) and S.yellowstonensis (c) as well as a transitional fossil.Which modern species does the transitional fossil most resemble?

Correct AnswerverifiedShow Answer

Sponges:

Correct AnswerverifiedShow Answer

figure 17.20 -In figure 17.20,the plant community changed from alpine tundra grasses to coniferous forest as temperatures warmed up.In this figure lodgepole pines are occupying which of the following?

Correct AnswerverifiedShow Answer

Chloroplasts in algae are thought to have arisen from which source?

Correct AnswerverifiedShow Answer

A dinoflagellate has both a transverse flagellum and longitudinal flagellum.

Correct AnswerverifiedShow Answer

All protists are single-celled.

Correct AnswerverifiedShow Answer

Alternation of generations means having alternating multicelled haploid and diploid phases in a life cycle.

Correct AnswerverifiedShow Answer

In malaria,Plasmodium falciparum grow inside of human cells.As such they are which of the following?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

How might global climate change affect the distribution of malaria?

Correct AnswerverifiedShow Answer

The engulfment of food particles by a cell is:

Correct AnswerverifiedShow Answer

Euglena and dinoflagellates have chloroplasts and flagella.This means they are which of the following?

Correct AnswerverifiedShow Answer

African sleeping sickness is caused by Trypanosoma brucei,a unicellular flagellated protist infects red blood cells after being injected into the blood stream.African sleeping sickness is transmitted by:

Correct AnswerverifiedShow Answer

Cytoplasmic extensions by which some protozoa move are:

Correct AnswerverifiedShow Answer

The microscopic food that supports the ocean's vast food webs is:

Correct AnswerverifiedShow Answer

The movement toward a chemical stimulus is called cytokinesis.

Correct AnswerverifiedShow Answer

Cryptosporidium is an apicomplexian that can contaminate water supplies.Which of the following would you predict to be the case of a Cryptosporidium outbreak?

Correct AnswerverifiedShow Answer

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