Question 1

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

Question 2

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 algae 
A) dinoflagellates 
B) diatoms 
C) amoebas 
D) brown algae B

Question 3

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. 
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. B

Question 4

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 cells 
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 cells

Question 5

Which of the following cellular structures is characteristic of amoebas?

Accepted Answer

A) cilia 
B) flagella 
C) pseudopodia 
D) microvilli 
A) cilia 
B) flagella 
C) pseudopodia 
D) microvilli

Question 6

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. 
A) green algae. 
B) brown algae. 
C) diatoms. 
D) red algae.

Question 7

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 radiolarians 
A) green algae and brown algae 
B) cellular slime molds and water molds 
C) dinoflagellates and diatoms 
D) foraminiferans and radiolarians

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 ...unikonts 
A) chromalveolates ...unikonts 
B) unikonts ...archaeplastids 
C) chromalveolates ...archaeplastids 
D) archaeplastids ...unikonts

Question 9

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) cocci 
A) yeasts 
B) halobacteria 
C) actinomycetes 
D) cocci

Question 10

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) bioremediation 
A) nitrogen fixation 
B) decomposition 
C) biocomposting 
D) bioremediation

Question 11

are heterotrophic protists; _ are photoautotrophic protists.

Accepted Answer

A) Protozoans ...algae 
B) Protozoans ...plants 
C) Parasites ...protozoans 
D) Mixotrophs ...protozoans 
A) Protozoans ...algae 
B) Protozoans ...plants 
C) Parasites ...protozoans 
D) Mixotrophs ...protozoans

Question 12

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. 
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.

Question 13

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 endosymbiosis 
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 endosymbiosis

Question 14

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

Question 15

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). 
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).

Question 16

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

Accepted Answer

A) tissue 
B) plague 
C) biofilm 
D) bioaggregate 
A) tissue 
B) plague 
C) biofilm 
D) bioaggregate

Question 17

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. 
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.

Question 18

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

Question 19

Rod- shaped bacteria are called

Accepted Answer

A) bacilli. 
B) spirochetes. 
C) cocci. 
D) vibrios. 
A) bacilli. 
B) spirochetes. 
C) cocci. 
D) vibrios.

Question 20

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) Amoeba 
A) Trypanosoma 
B) Plasmodium 
C) Paramecium 
D) Amoeba

Exam 16: Microbial Life: Prokaryotes and Protists

Prokaryotes are classified into

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?

Dinoflagellates are best described as

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

Which of the following cellular structures is characteristic of amoebas?

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

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

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 .

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

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

are heterotrophic protists; _ are photoautotrophic protists.

Which of the following statements about archaea is false?

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

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

Prokaryotic cell walls function

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

According to current scientific thinking,true multicellular organisms

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

Rod- shaped bacteria are called

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

Biology: Exploring Life

The Chemical Basis of Life

The Molecules of Cells

A Tour of the Cell

The Working Cell

How Cells Harvest Chemical Energy

Photosynthesis: Using Light to Make Food

The Cellular Basis of Reproduction and Inheritance

Patterns of Inheritance

Molecular Biology of the Gene

How Genes Are Controlled

Dna Technology and Genomics

How Populations Evolve

The Origin of Species

Tracing Evolutionary History

The Evolution of Plant and Fungal Diversity

The Evolution of Invertebrate Diversity

The Evolution of Vertebrate Diversity

Unifying Concepts of Animal Structure and Function

Nutrition and Digestion

Gas Exchange

Circulation

The Immune System

Control of Body Temperature and Water Balance

Hormones and the Endocrine System

Reproduction and Embryonic Development

Nervous Systems

The Senses

How Animals Move

Plant Structure,growth,and Reproduction

Plant Nutrition and Transport

Control Systems in Plants

The Biosphere: an Introduction to Earths Diverse Environments

Behavioral Adaptations to the Environment

Population Ecology

Communities and Ecosystems

Conservation Biology

Filters