Question 1

Of the following,the largest,most inclusive grouping in the classification scheme is

Accepted Answer

A)  genus.
B)  family.
C)  kingdom.
D)  class.
E)  order.F) B) and D)
G) A) and D)

Question 2

The age of the Earth according to modern estimations is

Accepted Answer

A)  8 billion years.
B)  4.5 billion years.
C)  3.5 billion years.
D)  1.5 billion years.
E)  a few thousand years.F) A) and C)
G) A) and E)

Question 3

The biological name of an organism in the binomial system contains two parts,the genus and the

Accepted Answer

A)  species.
B)  phylum.
C)  kingdom.
D)  order.
E)  family.F) C) and D)
G) A) and B)

Question 4

The characteristics of life include all of the following except

Accepted Answer

A)  complexity.
B)  homeostasis.
C)  multicellularity.
D)  sensitivity to environment.
E)  heredity.F) A) and E)
G) A) and D)

Question 5

Eutherians mammals are placed in four groups,a major split occurring between

Accepted Answer

A)  North and South American clades.
B)  Australian and African clades.
C)  African and South American clades.
D)  marsupials and monotremes.
E)  Asian and North American clades.F) A) and B)
G) C) and E)

Question 6

Segmentation is thought to have evolved three times,twice in protostomes and once in deuterstomes as seen in the

Accepted Answer

A)  echinoderms.
B)  nematodes.
C)  flatworms.
D)  mollusks.
E)  chordates.F) A) and B)
G) None of the above

Question 7

Eukaryotic cells acquired mitochondria and chloroplasts by

Accepted Answer

A)  endosymbiosis.
B)  exocytosis.
C)  pinocytosis.
D)  mutation.
E)  natural selection.F) B) and E)
G) B) and C)

Question 8

The hypothesis of __________ proposes that meteors or cosmic dust may have brought complex organic molecules to Earth.

Accepted Answer

The answer of The hypothesis of __________ proposes that meteors...

Question 9

Molecular data indicates that land plants belong in the same ________ as green algae.

Accepted Answer

A)  clade
B)  family
C)  kingdom
D)  order
E)  classF) B) and C)
G) A) and C)

Question 10

Prokaryotes were the only organisms for about _________ billion years after life began on Earth.

Accepted Answer

The answer of Prokaryotes were the only organisms for about...

Question 11

In the taxonomic hierarchical system for grouping organisms,the next higher group to a family is

Accepted Answer

A)  genus.
B)  order.
C)  class.
D)  species.
E)  phylum.F) C) and D)
G) B) and E)

Question 12

An organism has just been located and needs to be placed into one of the domains of life.The characteristics that have been reported are multicellular and autotrophic.Based on your knowledge,which domain should this organism be placed?

Accepted Answer

A)  Bacteria.
B)  Archaea
C)  Bacteria
D)  Eukarya
E)  VirdiplantaeF) A) and B)
G) A) and C)

Question 13

It has been discovered that enzyme-like catalysis can be carried out not only by enzymes but also by

Accepted Answer

A)  sugars.
B)  DNA.
C)  phospholipids.
D)  RNA.
E)  steroids.F) C) and D)
G) B) and E)

Question 14

Of the following primitive Earth conditions and chemical reactions,which one do biochemists know was important to the formation of amino acids and subsequent formation of complex carbon molecules that are common to life?

Accepted Answer

A)  There had to be a reducing atmosphere rather than one with oxygen,otherwise formation of those molecules would have been extremely difficult.
B)  There had to be an atmosphere with oxygen rather than a reducing atmosphere,otherwise formation of those molecules would have been extremely difficult.
C)  Cellular respiration was necessary for the reducing atmosphere to form,otherwise photosynthesis would not have been able to occur.
D)  Sulfide molecules from deep-sea vents interacted with available atmospheric oxygen,producing a reducing atmosphere that would have encouraged amino acid formation.
E)  Silicate surfaces provide excellent substrates for cellular respiration,thus increasing the available atmospheric oxygen,which in turn promoted evolution of inorganic molecules into animate forms.F) B) and E)
G) B) and D)

Question 15

Lacking one of the criteria to be strictly classified as living units and containing fragments of eukaryotic genomes,the viruses are included in

Accepted Answer

A)  bacteriA.
B)  protists.
C)  yeasts.
D)  prokaryotes.
E)  none of the kingdoms.F) A) and D)
G) A) and C)

Question 16

True multicellularity is a major characteristic of

Accepted Answer

A)  all eukaryotes and a few prokaryotes.
B)  animals and plants only.
C)  eukaryotes only.
D)  protists,plants,and animals.
E)  prokaryotes and protists.F) A) and D)
G) A) and E)

Question 17

The oldest microfossils are of

Accepted Answer

A)  prokaryotes.
B)  eukaryotes.
C)  insects.
D)  pollen grains.
E)  small animals.F) A) and B)
G) A) and C)

Question 18

Which one of the following statements about viruses is false?

Accepted Answer

A)  Viruses do not fit into biological classification schemes.
B)  The viral genome can consist of DNA or RNA.
C)  Viruses are considered detached fragments of prokaryotic genomes.
D)  A virus can only reproduce when within a host cell.
E)  Viruses are acellular.F) C) and E)
G) A) and D)

Question 19

Although the Archaebacteria were classified in the same group with the Bacteria,they are probably more closely related to the Eukarya.Which one of the following features do they share in common with the bacteria?

Accepted Answer

A)  introns in some genes
B)  a branched membrane lipid structure
C)  several different RNA polymerases
D)  absence of nuclear envelope
E)  no peptidoglycan in cell wallsF) A) and B)
G) A) and E)

Question 20

Pinus in the scientific name Pinus ponderosa is the

Accepted Answer

A)  phylum.
B)  class.
C)  family.
D)  genus.
E)  species.F) A) and B)
G) All of the above

Exam 26: The Tree of Life

The hypothesis of __________ proposes that meteors or cosmic dust may have brought complex organic molecules to Earth.

Correct AnswerverifiedShow Answer

Of the following,the largest,most inclusive grouping in the classification scheme is

Correct AnswerverifiedShow Answer

It has been discovered that enzyme-like catalysis can be carried out not only by enzymes but also by

Correct AnswerverifiedShow Answer

The age of the Earth according to modern estimations is

Correct AnswerverifiedShow Answer

Molecular data indicates that land plants belong in the same ________ as green algae.

Correct AnswerverifiedShow Answer

Which one of the following statements about viruses is false?

Correct AnswerverifiedShow Answer

Lacking one of the criteria to be strictly classified as living units and containing fragments of eukaryotic genomes,the viruses are included in

Correct AnswerverifiedShow Answer

The oldest microfossils are of

Correct AnswerverifiedShow Answer

In the taxonomic hierarchical system for grouping organisms,the next higher group to a family is

Correct AnswerverifiedShow Answer

Eutherians mammals are placed in four groups,a major split occurring between

Correct AnswerverifiedShow Answer

Pinus in the scientific name Pinus ponderosa is the

Correct AnswerverifiedShow Answer

Although the Archaebacteria were classified in the same group with the Bacteria,they are probably more closely related to the Eukarya.Which one of the following features do they share in common with the bacteria?

Correct AnswerverifiedShow Answer

The characteristics of life include all of the following except

Correct AnswerverifiedShow Answer

Of the following primitive Earth conditions and chemical reactions,which one do biochemists know was important to the formation of amino acids and subsequent formation of complex carbon molecules that are common to life?

Correct AnswerverifiedShow Answer

Segmentation is thought to have evolved three times,twice in protostomes and once in deuterstomes as seen in the

Correct AnswerverifiedShow Answer

An organism has just been located and needs to be placed into one of the domains of life.The characteristics that have been reported are multicellular and autotrophic.Based on your knowledge,which domain should this organism be placed?

Correct AnswerverifiedShow Answer

The biological name of an organism in the binomial system contains two parts,the genus and the

Correct AnswerverifiedShow Answer

True multicellularity is a major characteristic of

Correct AnswerverifiedShow Answer

Eukaryotic cells acquired mitochondria and chloroplasts by

Correct AnswerverifiedShow Answer

Prokaryotes were the only organisms for about _________ billion years after life began on Earth.

Correct AnswerverifiedShow Answer

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