Question 1

The Cambrian explosion refers to Earth's life history benchmark of

Accepted Answer

A)   development of the first multicellular organisms.
B)   mass extinction of the nonavian dinosaurs.
C)   origination of life, when the progenotes formed the first cells.
D)   All of the answer choices are correct.
E)   appearance of fossils for all major phyla of animals.

Question 2

Ediacaran organisms lived during the _____ period.

Accepted Answer

A)   Precambrian
B)   Jurassic
C)   Devonian
D)   Cambrian
E)   Silurian

Question 3

News stories each year note the increase in carbon dioxide,from combustion of coal in electrical generating plants,or from use of petroleum fuels in vehicles.Most states require emissions quality tests to limit automobile emissions.The fuels used in cars,and the carbon dioxide cars emit,were originally

Accepted Answer

A)   carbon dioxide fixed by vascular and nonvascular plants during photosynthesis about 300 mya.
B)   carbon in the tissues, decayed from dinosaurs after the Cretaceous mass extinction.
C)   carbon dioxide trapped in the ocean and secreted into large coral reef structures, during the Mesozoic.
D)   carbon dioxide released from volcanoes, and accumulating over centuries.
E)   carbon dioxide trapped in rocks and compressed into oil and coal, during the Precambrian.

Question 4

The first amphibians appeared during the _____ period.

Accepted Answer

A)   Cambrian
B)   Silurian
C)   Carboniferous
D)   Ordovician
E)   Devonian

Question 5

Which scientist is given credit for proposing the endosymbiont theory?

Accepted Answer

A)   Lynn Margulis
B)   Stanley Miller
C)   Charles Darwin
D)   Svante Arrenhius
E)   Louis Pasteur

Question 6

According to the evolutionary tree,humans share a common ancestor with other groups of apes.

Accepted Answer

A) True 
 B)False

Question 7

Humans and chimps are both able to

Accepted Answer

A)   communicate.
B)   use tools and communicate.
C)   walk upright.
D)   walk upright and use tools.
E)   use tools.

Question 8

The three groups in the primate lineage are

Accepted Answer

A)   monkeys, gibbons, and orangutans.
B)   hominines, hominids, and hominoids.
C)   chimpanzees, gorillas, and humans.
D)   prosimians, monkeys, and hominoids.
E)   gorillas, bonobos, and chimpanzees.

Question 9

The two major extinctions of living species occurred during the Mesozoic era.

Accepted Answer

A) True 
 B)False

Question 10

Natural selection would have favored progenotes that could use more diverse food sources.

Accepted Answer

A) True 
 B)False

Question 11

The three periods of the Mesozoic era in sequence from most ancient to most recent are

Accepted Answer

A)   Cambrian, Ordovician, and Silurian.
B)   Cretaceous, Jurassic, and Triassic.
C)   Silurian, Ordovician, and Cambrian.
D)   Permian, Triassic, and Jurassic.
E)   Triassic, Jurassic, and Cretaceous.

Question 12

The first flowering plants,first true mammals,and first true frogs appeared during the _____ period.

Accepted Answer

A)   Cambrian
B)   Triassic
C)   Permian
D)   Cretaceous
E)   Jurassic

Question 13

The last shared ancestor for today's cell types is thought to have arisen about _____ years ago.

Accepted Answer

A)   3 million
B)   6 billion
C)   4 billion
D)   4 million
E)   3 billion

Question 14

For a span of 248 mya to 65 mya,the Mesozoic Era,in which dinosaurs appeared,dominated and became extinct,lasted approximately ___ of the geologic timescale.

Accepted Answer

A)   50%
B)   7%
C)   20%
D)   15%
E)   4%

Question 15

Prior to the work of Li and others,scientists had estimated that Homo sapiens had lived in a limited African range at about 40,000 years ago.Migration took subpopulations away from this original area.Although speciation did not occur in this time,

Accepted Answer

A)   DNA sequence data indicated that Homo sapiens subpopulations showed little natural selection of genotypes and phenotypes.
B)   None of the answer choices are correct.
C)   DNA sequence data indicated that gradualism dominated the evolutionary history of humans in the last 40,000 years.
D)   DNA sequence data showed that people from Africa, Asia, and Europe actively interbred and maintained a constant gene pool.
E)   DNA sequence data indicated a rapid adaptive radiation, leading to microevolution of the gene pools.

Question 16

How is the ability of phospholipids to spontaneously form membranes when placed in water important in the origin of life on Earth?

Accepted Answer

A)   Membranes are used by cells to isolate their contents from the environment.
B)   Membranes protect a cell from gases in the atmosphere.
C)   Membranes protect a cell from high temperatures and pressures in the environment.
D)   Membranes are used by cells to catalyze reactions.
E)   Membranes are used by cells to store genetic information.

Question 17

Advantage (advantages) of bipedalism include

Accepted Answer

A)   All of the answer choices are correct.
B)   increased brain size.
C)   freeing of hands to carry objects and use tools.
D)   ability to run faster.
E)   movement through the treetops and clinging to vines.

Question 18

The coding region of chimpanzee genes and human genes are 99% identical.

Accepted Answer

A) True 
 B)False

Question 19

Hominids include

Accepted Answer

A)   gorillas.
B)   humans.
C)   chimpanzees.
D)   orangutans.
E)   All of the answer choices are correct.

Question 20

The three periods of the Mesozoic era are the Triassic,Jurassic,and Cretaceous.

Accepted Answer

A) True 
 B)False

Exam 15: The Origin and History of Life

Which scientist is given credit for proposing the endosymbiont theory?

Correct Answer
verified

Natural selection would have favored progenotes that could use more diverse food sources.

Correct Answer
verified

Ediacaran organisms lived during the _____ period.

Correct Answer
verified

The coding region of chimpanzee genes and human genes are 99% identical.

Correct Answer
verified

The two major extinctions of living species occurred during the Mesozoic era.

Correct Answer
verified

The three periods of the Mesozoic era in sequence from most ancient to most recent are

Correct Answer
verified

For a span of 248 mya to 65 mya,the Mesozoic Era,in which dinosaurs appeared,dominated and became extinct,lasted approximately ___ of the geologic timescale.

Correct Answer
verified

The last shared ancestor for today's cell types is thought to have arisen about _____ years ago.

Correct Answer
verified

The Cambrian explosion refers to Earth's life history benchmark of

Correct Answer
verified

The first amphibians appeared during the _____ period.

Correct Answer
verified

The three periods of the Mesozoic era are the Triassic,Jurassic,and Cretaceous.

Correct Answer
verified

The three groups in the primate lineage are

Correct Answer
verified

Correct Answer
verified

Humans and chimps are both able to

Correct Answer
verified

Advantage (advantages) of bipedalism include

Correct Answer
verified

According to the evolutionary tree,humans share a common ancestor with other groups of apes.

Correct Answer
verified

Hominids include

Correct Answer
verified

Prior to the work of Li and others,scientists had estimated that Homo sapiens had lived in a limited African range at about 40,000 years ago.Migration took subpopulations away from this original area.Although speciation did not occur in this time,

Correct Answer
verified

The first flowering plants,first true mammals,and first true frogs appeared during the _____ period.

Correct Answer
verified

How is the ability of phospholipids to spontaneously form membranes when placed in water important in the origin of life on Earth?

Correct Answer
verified

Exam 15: The Origin and History of Life

Which scientist is given credit for proposing the endosymbiont theory?

Correct AnswerverifiedShow Answer

Natural selection would have favored progenotes that could use more diverse food sources.

Correct AnswerverifiedShow Answer

Ediacaran organisms lived during the _____ period.

Correct AnswerverifiedShow Answer

The coding region of chimpanzee genes and human genes are 99% identical.

Correct AnswerverifiedShow Answer

The two major extinctions of living species occurred during the Mesozoic era.

Correct AnswerverifiedShow Answer

The three periods of the Mesozoic era in sequence from most ancient to most recent are

Correct AnswerverifiedShow Answer

For a span of 248 mya to 65 mya,the Mesozoic Era,in which dinosaurs appeared,dominated and became extinct,lasted approximately ___ of the geologic timescale.

Correct AnswerverifiedShow Answer

The last shared ancestor for today's cell types is thought to have arisen about _____ years ago.

Correct AnswerverifiedShow Answer

The Cambrian explosion refers to Earth's life history benchmark of

Correct AnswerverifiedShow Answer

The first amphibians appeared during the _____ period.

Correct AnswerverifiedShow Answer

The three periods of the Mesozoic era are the Triassic,Jurassic,and Cretaceous.

Correct AnswerverifiedShow Answer

The three groups in the primate lineage are

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Humans and chimps are both able to

Correct AnswerverifiedShow Answer

Advantage (advantages) of bipedalism include

Correct AnswerverifiedShow Answer

According to the evolutionary tree,humans share a common ancestor with other groups of apes.

Correct AnswerverifiedShow Answer

Hominids include

Correct AnswerverifiedShow Answer

Prior to the work of Li and others,scientists had estimated that Homo sapiens had lived in a limited African range at about 40,000 years ago.Migration took subpopulations away from this original area.Although speciation did not occur in this time,

Correct AnswerverifiedShow Answer

The first flowering plants,first true mammals,and first true frogs appeared during the _____ period.

Correct AnswerverifiedShow Answer

How is the ability of phospholipids to spontaneously form membranes when placed in water important in the origin of life on Earth?

Correct AnswerverifiedShow Answer

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