Question 1

Which of the following is generally not considered essential to explain the origin of life on Earth?

Accepted Answer

A)  a reducing atmosphere
B)  sexual reproduction
C)  a suitable energy source
D)  organic building block compounds
E)  formation of a constraining lipid or protein boundary

Question 2

The early Earth's reducing atmosphere probably contained all of the following except

Accepted Answer

A)  carbon dioxide.
B)  water.
C)  oxygen.
D)  hydrogen sulfide.
E)  methanE.

Question 3

A kingdom not containing eukaryotes is

Accepted Answer

A)  ProtistA.
B)  Archaebacteria.
C)  Fungi.
D)  Animalia.
E)  Plantae (virdiplantae) .

Question 4

All living organisms share all of the following features in common except they

Accepted Answer

A)  carry out metabolism.
B)  transfer energy with ATP.
C)  encode hereditary information in DNA.
D)  are composed of one or more cells.
E)  contain organelles.

Question 5

Which one of the following statements about origin of land plants is false?

Accepted Answer

A)  Chlorophyta and Streptophyta are sister clades within the kingdom Virdiplantae.
B)  Horizontal gene transfer (HGT) occurred several times in the evolution of the land plants.
C)  The Streptophyta group Charales is a sister clade to the land plants.
D)  Land plants are now considered a subgroup within the Chlorophyta.
E)  Moss mitochondrial genes are present in the ancient flowering plant Amborella.

Question 6

Living organisms can be divided into _____ domains.

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5

Question 7

All of the following were produced in experiments on primitive Earth conditions conducted by Miller-Urey and others,except for

Accepted Answer

A)  amino acids.
B)  adenine and other nucleotides.
C)  prokaryotes.
D)  hydrogen cyanide.
E)  urea.

Question 8

The binomial system of classification of organisms was developed by

Accepted Answer

A)  Darwin.
B)  Linnaeus.
C)  Wallace.
D)  Griffith.
E)  Schleidin.

Question 9

Most biologists now recognize and use a newer system for classification of all organisms that identify

Accepted Answer

A)  two kingdoms.
B)  three kingdoms.
C)  four kingdoms.
D)  five kingdoms.
E)  six kingdoms.

Question 10

The first living organisms that arose on earth are believed to have evolved according to a series of steps represented by the appearance of specific molecules.Of the molecules listed,which one would most likely have appeared fourth?

Accepted Answer

A)  hydrogen cyanide
B)  ATP
C)  Ribozymes
D)  DNA
E)  amino acids

Question 11

Which of the following statements about viruses is not accurate?

Accepted Answer

A)  Viruses are fragments of nucleic acids with associated proteins.
B)  Viruses can infect organisms at all taxonomic levels.
C)  Viruses can be placed in the Archaea Domain of life because of their similarities with these primitive organisms.
D)  Viruses cannot reproduce on their own.
E)  Viruses can invade cells and produce more copies of themselves.

Question 12

The oldest fossils of eukaryotes have been estimated to be

Accepted Answer

A)  6000 years old.
B)  8 billion years old.
C)  4.5 billion years old.
D)  2.5 billion years olD.
E)  1995 years old.

Question 13

The group that probably gave rise to chloroplasts is the

Accepted Answer

A)  cyanobacteriA.
B)  green photosynthetic bacteria.
C)  purple sulfur bacteria.
D)  non-sulfur purple bacteria.
E)  methane bacteria.

Question 14

The phenomenon that probably gave rise to the organelles in eukaryotes is

Accepted Answer

A)  recombination.
B)  mutation.
C)  syngamy.
D)  endosymbiosis.
E)  multicellularity.

Question 15

Which one of the following statements about protists is false?

Accepted Answer

A)  Any eukaryote that is not a plant,fungus,or animal is classified as a protist.
B)  The green algae are more closely related to the plants.
C)  The choanoflagellates are more closely related to the fungi than to other protists.
D)  The kingdom Protista is probably paraphyletic.
E)  The new kingdom Virdiplantae contains a group previously included in the Protista.

Question 16

Which one of the following statements about the characteristics of eukaryotes is false?

Accepted Answer

A)  The structure of the eukaryotic cell allows the physical separation of replication and transcription.
B)  Multicellularity in the eukaryotes has multiple origins.
C)  Not all eukaryotes are multicellular.
D)  Meiosis,fertilization,and crossing over are unique features of sexual reproduction.
E)  A cytoskeleton is a unique feature of eukaryotic cells.

Question 17

One of the theories about the origin of life is panspermia.Panspermia proposes that

Accepted Answer

A)  extraterrestrials from extreme distances from Earth seeded the developing planet with primitive life forms,which eventually evolved into what we know today.
B)  meteors and/or cosmic dust clouds carried various primitive life forms to the Earth,which eventually evolved into what we know today.
C)  meteors and/or cosmic dust clouds carried various complex organic molecules to the Earth,which eventually evolved into what we know today.
D)  extraterrestrials from extreme distances from Earth seeded the developing planet with complex organic molecules,which eventually evolved into what we know today.
E)  spontaneous generation of life followed either an extraterrestrial visit or a meteor deposition of inorganic molecules.

Question 18

The Swedish biologist,________,developed a simpler two-part (binomial)naming system for organisms.

Accepted Answer

The answer of The Swedish biologist,________,developed a simpler two-part (binomial)naming...

Question 19

Of the following,the correct order from largest,most inclusive group to smallest,most specific group,is

Accepted Answer

A)  species,genus,family,class,order.
B)  species,family,genus,class,order.
C)  class,genus,order,family,species.
D)  class,order,family,genus,species.
E)  class,family,order,genus,species.

Question 20

If two organisms are in the same phylum and the same order,then they also belong to the same

Accepted Answer

A)  class.
B)  family.
C)  genus.
D)  species.
E)  subspecies.

Exam 26: The Tree of Life

The oldest fossils of eukaryotes have been estimated to be

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Which one of the following statements about origin of land plants is false?

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One of the theories about the origin of life is panspermia.Panspermia proposes that

Correct AnswerverifiedShow Answer

Which of the following is generally not considered essential to explain the origin of life on Earth?

Correct AnswerverifiedShow Answer

The first living organisms that arose on earth are believed to have evolved according to a series of steps represented by the appearance of specific molecules.Of the molecules listed,which one would most likely have appeared fourth?

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The early Earth's reducing atmosphere probably contained all of the following except

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The phenomenon that probably gave rise to the organelles in eukaryotes is

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Which one of the following statements about the characteristics of eukaryotes is false?

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Living organisms can be divided into _____ domains.

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The group that probably gave rise to chloroplasts is the

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If two organisms are in the same phylum and the same order,then they also belong to the same

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Most biologists now recognize and use a newer system for classification of all organisms that identify

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Which of the following statements about viruses is not accurate?

Correct AnswerverifiedShow Answer

All living organisms share all of the following features in common except they

Correct AnswerverifiedShow Answer

The binomial system of classification of organisms was developed by

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The Swedish biologist,________,developed a simpler two-part (binomial)naming system for organisms.

Correct AnswerverifiedShow Answer

All of the following were produced in experiments on primitive Earth conditions conducted by Miller-Urey and others,except for

Correct AnswerverifiedShow Answer

Of the following,the correct order from largest,most inclusive group to smallest,most specific group,is

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Which one of the following statements about protists is false?

Correct AnswerverifiedShow Answer

A kingdom not containing eukaryotes is

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