Question 1

According to the figure,green alga resulted from and Euglena resulted from _ .

Accepted Answer

A)  both primary and secondary endosymbiosis ...secondary endosymbiosis only
B)  primary endosymbiosis ...primary endosymbiosis
C)  secondary endosymbiosis only ...primary endosymbiosis
D)  primary endosymbiosis ...both primary and secondary endosymbiosisE) B) and C)
F) C) and D)

Question 2

According to current scientific thinking,true multicellular organisms

Accepted Answer

A)  descend from several different kinds of unicellular protists,which became multicellular through specialization and cooperation among cells within a colony.
B)  cannot be traced to any existing or fossil intermediate stages; thus,there is no current scientific theory for the process that generated multicellular organisms from unicellular ancestors.
C)  formed through the fusion of several separate species of unicellular protists,who carried out different complementary functions within the evolving organism.
D)  are all descended from a single colonial protist ancestor.E) B) and D)
F) B) and C)

Question 3

There is a good chance you will eat carrageenan today and that you will eat nori at some point in your life,if you haven't already.In either case,you will be eating a product of

Accepted Answer

A)  green algae.
B)  brown algae.
C)  diatoms.
D)  red algae.E) A) and C)
F) None of the above

Question 4

Which of the following organisms are common soil decomposers that grow in colonies of branched chains of cells that superficially resembles a fungus?

Accepted Answer

A)  yeasts
B)  halobacteria
C)  actinomycetes
D)  cocciE) B) and C)
F) A) and D)

Question 5

Prokaryotes are classified into

Accepted Answer

A)  kingdom Bacteria and kingdom Archaea.
B)  kingdom Protista and kingdom Bacteria.
C)  domain Bacteria and domain Archaea.
D)  domain Protista and domain Archaea.E) C) and D)
F) A) and C) C

Question 6

Which of the following groups include organisms that are a key source of food in all aquatic environments and whose fossilized forms are used as a filter and as a grinding and polishing agent?

Accepted Answer

A)  dinoflagellates
B)  diatoms
C)  amoebas
D)  brown algaeE) A) and C)
F) B) and C) B

Question 7

The use of prokaryotes and other organisms to clean up pollutants from soil,air,or water is called .

Accepted Answer

A)  nitrogen fixation
B)  decomposition
C)  biocomposting
D)  bioremediationE) A) and B)
F) All of the above

Question 8

Multicellular organisms evolved from three different ancestral lineages: chromalveolates,unikonts,and archaeplastids.Of these,fungi and animals evolved from two different lineages of and land plants are .

Accepted Answer

A)  chromalveolates ...unikonts
B)  unikonts ...archaeplastids
C)  chromalveolates ...archaeplastids
D)  archaeplastids ...unikontsE) None of the above
F) All of the above

Question 9

Individual prokaryote cells are about eukaryote cells; collectively,all prokaryote cells on Earth .

Accepted Answer

A)  one- tenth as big as ...weigh about ten times as much as the total mass of eukaryote cells
B)  one- tenth as big as ...weigh about one- tenth the total mass of eukaryote cells
C)  the same size as ...weigh about one- tenth the total mass of eukaryote cells
D)  ten times bigger than ...weigh about ten times as much as the total mass of eukaryote cellsE) A) and B)
F) A) and C)

Question 10

Which of the following cellular structures is characteristic of amoebas?

Accepted Answer

A)  cilia
B)  flagella
C)  pseudopodia
D)  microvilliE) A) and B)
F) B) and C)

Question 11

are heterotrophic protists; _ are photoautotrophic protists.

Accepted Answer

A)  Protozoans ...algae
B)  Protozoans ...plants
C)  Parasites ...protozoans
D)  Mixotrophs ...protozoansE) A) and D)
F) None of the above

Question 12

A slimy layer of bacteria coating a surface is also known as a .

Accepted Answer

A)  tissue
B)  plague
C)  biofilm
D)  bioaggregateE) B) and C)
F) A) and B)

Question 13

You culture the dried soup from a 4,000- year- old cooking pot found in an Egyptian tomb and obtain a distinctive species of prokaryote.You immerse a test tube of these bacteria in boiling water for several hours,but the colony grows back.This species is probably

Accepted Answer

A)  a spirochete.
B)  a cyanobacteria.
C)  endospore- forming.
D)  halophilic.E) A) and B)
F) B) and C)

Question 14

Prokaryotic cell walls function

Accepted Answer

A)  as a site of metabolic reactions (photosynthesis and cellular respiration) .
B)  to prevent the cell from bursting in a hypotonic environment.
C)  to promote flexibility and formation of pseudopodia.
D)  to propel cells (locomotion) .E) B) and C)
F) All of the above

Question 15

Rod- shaped bacteria are called

Accepted Answer

A)  bacilli.
B)  spirochetes.
C)  cocci.
D)  vibrios.E) A) and C)
F) All of the above

Question 16

Which of the following statements about archaea is false?

Accepted Answer

A)  Some archaea live in the digestive tracts of cattle.
B)  Some archaea are adapted to extreme environments such as extremely salty or extremely hot habitats.
C)  Archaea are abundant in the oceans.
D)  Some archaea have mitochondria like those of eukaryotic cells.E) A) and B)
F) B) and C)

Question 17

Kelp,a seaweed that is anchored to the seafloor by rootlike structures and can grow to heights of 60 m,is a kind of

Accepted Answer

A)  green alga.
B)  water mold.
C)  brown alga.
D)  diatoms.E) A) and B)
F) B) and C)

Question 18

Which of the following is a parasitic excavate that causes African sleeping sickness,a disease spread by the tsetse fly?

Accepted Answer

A)  Trypanosoma
B)  Plasmodium
C)  Paramecium
D)  AmoebaE) B) and D)
F) B) and C)

Question 19

Which two groups of protists produce hard mineralized skeletal structures or cell walls that contribute to marine sediments and form fossils?

Accepted Answer

A)  green algae and brown algae
B)  cellular slime molds and water molds
C)  dinoflagellates and diatoms
D)  foraminiferans and radiolariansE) B) and C)
F) None of the above

Question 20

Dinoflagellates are best described as

Accepted Answer

A)  large,multicellular algae that resemble plants but do not have true leaves,stems,or roots.
B)  marine and freshwater algae that can produce harmful red tides.
C)  parasitic protozoans that must spend part of their life cycles in vertebrate hosts.
D)  protozoans that use cilia to move and feed.E) None of the above
F) A) and B) B

Exam 16: Microbial Life: Prokaryotes and Protists

According to the figure,green alga resulted from and Euglena resulted from _ .

Correct AnswerverifiedShow Answer

According to current scientific thinking,true multicellular organisms

Correct AnswerverifiedShow Answer

There is a good chance you will eat carrageenan today and that you will eat nori at some point in your life,if you haven't already.In either case,you will be eating a product of

Correct AnswerverifiedShow Answer

Which of the following organisms are common soil decomposers that grow in colonies of branched chains of cells that superficially resembles a fungus?

Correct AnswerverifiedShow Answer

Prokaryotes are classified into

Correct AnswerverifiedC

Which of the following groups include organisms that are a key source of food in all aquatic environments and whose fossilized forms are used as a filter and as a grinding and polishing agent?

Correct AnswerverifiedB

The use of prokaryotes and other organisms to clean up pollutants from soil,air,or water is called .

Correct AnswerverifiedShow Answer

Multicellular organisms evolved from three different ancestral lineages: chromalveolates,unikonts,and archaeplastids.Of these,fungi and animals evolved from two different lineages of and land plants are .

Correct AnswerverifiedShow Answer

Individual prokaryote cells are about eukaryote cells; collectively,all prokaryote cells on Earth .

Correct AnswerverifiedShow Answer

Which of the following cellular structures is characteristic of amoebas?

Correct AnswerverifiedShow Answer

are heterotrophic protists; _ are photoautotrophic protists.

Correct AnswerverifiedShow Answer

A slimy layer of bacteria coating a surface is also known as a .

Correct AnswerverifiedShow Answer

You culture the dried soup from a 4,000- year- old cooking pot found in an Egyptian tomb and obtain a distinctive species of prokaryote.You immerse a test tube of these bacteria in boiling water for several hours,but the colony grows back.This species is probably

Correct AnswerverifiedShow Answer

Prokaryotic cell walls function

Correct AnswerverifiedShow Answer

Rod- shaped bacteria are called

Correct AnswerverifiedShow Answer

Which of the following statements about archaea is false?

Correct AnswerverifiedShow Answer

Kelp,a seaweed that is anchored to the seafloor by rootlike structures and can grow to heights of 60 m,is a kind of

Correct AnswerverifiedShow Answer

Which of the following is a parasitic excavate that causes African sleeping sickness,a disease spread by the tsetse fly?

Correct AnswerverifiedShow Answer

Which two groups of protists produce hard mineralized skeletal structures or cell walls that contribute to marine sediments and form fossils?

Correct AnswerverifiedShow Answer

Dinoflagellates are best described as

Correct AnswerverifiedB

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C

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B

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B