Question 1

Which of the following lists of mass extinctions is correctly matched with the date of the extinction?

Accepted Answer

A)  Silurian / 445.2 mya
B)  Devonian / 443.7 mya
C)  Cretaceous / 65.5 mya
D)  Triassic / 251 myaE) A) and B)
F) A) and C)

Question 2

When and where did the first multicellular protists evolve?

Accepted Answer

A)  Africa / 2.3 BYA
B)  Canada / 1.4 BYA
C)  Middle East / 4.6 BYA
D)  Asia / 3.2 BYAE) C) and D)
F) All of the above

Question 3

The first person who proposed that small organic molecules could have arisen by chemical evolution was

Accepted Answer

A)  Stanley Miller.
B)  Graham Cairns-Smith.
C)  Thomas Cech.
D)  Aleksander Oparin.
E)  Sidney Fox.F) C) and E)
G) A) and E)

Question 4

Which of the following mass extinction events is correct?

Accepted Answer

A)  During the Permian period over 90% of the species disappeared due to an excess of carbon dioxide in the atmosphere.
B)  At the end of the Ordovician period over 90% of the species went extinct due to a bolide impacting the Earth's surface and causing a cloud of ash to reduce solar exposure for several weeks.
C)  At the end of the Cretaceous period over 90% of the species went extinct due to a bolide impacting the Earth's surface and causing a cloud of ash to reduce solar exposure for several weeks.
D)  At the end of the Devonian period 70% of the terrestrial vertebrates went extinct when Gondwana drifted back towards the South Pole.E) A) and C)
F) B) and C)

Question 5

Africa,Asia,South America,and Antarctica share some patterns of primitive (fossil) plants and early reptiles,but do not have similar mammal populations.These findings

Accepted Answer

A)  cast serious doubts upon the theory of continental drift and fused land masses.
B)  are an unsolved puzzle probably due to the random nature of biological evolution.
C)  suggest that a pattern of land bridges existed at different times in geological history.
D)  suggest that the earlier plants and reptiles evolved while continents were joined,but mammals radiated into diverse groups after separation.
E)  suggest that the mammals evolved earlier while continents were joined,but plants and reptiles radiated into diverse groups after separation.F) C) and D)
G) A) and B)

Question 6

Which event and date is mismatched?

Accepted Answer

A)  origin of multicellular organisms-650 million years ago
B)  origin of life-4.8 billion years ago
C)  origin of eukaryotic cells-2.2 billion years ago
D)  All the choices are incorrect.E) All of the above
F) B) and D)

Question 7

Who was the individual who proposed the hypothesis of continental drift during the 1920s?

Accepted Answer

A)  Alfred Wegener
B)  Charles Darwin
C)  Alfred Russel Wallace
D)  Charles LyellE) A) and B)
F) A) and C)

Question 8

Which of the following forms of energy was NOT involved in the production of large organic molecules in the primitive reducing atmosphere?

Accepted Answer

A)  radioactivity
B)  electrical energy
C)  heat
D)  radiation from the sun
E)  soundF) None of the above
G) C) and D)

Question 9

Fossils of prokaryotic cells are dated as far back as approximately _____ billion years ago.

Accepted Answer

A)  1.5
B)  2.8
C)  3.8
D)  4.8E) B) and C)
F) C) and D)

Question 10

The synthesis of DNA or RNA from the organic soup would have been guided by the actions of enzymes in the

Accepted Answer

A)  protein-first hypothesis.
B)  RNA-first hypothesis.
C)  clay-catalyst hypothesis.
D)  chloroplast.E) C) and D)
F) A) and B)

Question 11

Dinosaurs were the dominant group during the Mesozoic Era and many scientists believe that they were

Accepted Answer

A)  endothermic,or warm blooded.
B)  ectothermic,or cold-blooded.
C)  exergonic,or energy releasing.
D)  both endothermic and ectothermic.Some scientists believe that certain dinosaurs were endothermic while others believe that certain dinosaurs were ectothermic.E) C) and D)
F) B) and C)

Question 12

Which piece of evidence supports the hypothesis of continental drift?

Accepted Answer

A)  Alfred Wegener believed that the continents formed a supercontinent called Pangea.
B)  Charles Darwin believed that the continents formed a supercontinent called Pangea.
C)  Charles Lyell believed that the continents split into two smaller continents called Gondwana and Laurasia.
D)  Alfred Wallace believed that the distribution of seed fern fossils supported continental drift.E) All of the above
F) B) and D)

Question 13

The time that it takes for half of a radioactive isotope to change into another stable element is its

Accepted Answer

A)  activation time.
B)  life span.
C)  half-life.
D)  chemical life cycle.E) B) and D)
F) A) and D)

Question 14

The scientific study of fossils and what they reveal about prehistoric life in relation to ancient climates and environments is

Accepted Answer

A)  biogeography.
B)  comparative molecular biology.
C)  paleontology.
D)  geology.E) All of the above
F) A) and B)

Exam 18: Origin and History of Life

Dinosaurs were the dominant group during the Mesozoic Era and many scientists believe that they were

Correct Answer
verified

Fossils of prokaryotic cells are dated as far back as approximately _____ billion years ago.

Correct Answer
verified

The synthesis of DNA or RNA from the organic soup would have been guided by the actions of enzymes in the

Correct Answer
verified

The scientific study of fossils and what they reveal about prehistoric life in relation to ancient climates and environments is

Correct Answer
verified

Who was the individual who proposed the hypothesis of continental drift during the 1920s?

Correct Answer
verified

Which piece of evidence supports the hypothesis of continental drift?

Correct Answer
verified

The first person who proposed that small organic molecules could have arisen by chemical evolution was

Correct Answer
verified

When and where did the first multicellular protists evolve?

Correct Answer
verified

Which of the following mass extinction events is correct?

Correct Answer
verified

The time that it takes for half of a radioactive isotope to change into another stable element is its

Correct Answer
verified

Which of the following lists of mass extinctions is correctly matched with the date of the extinction?

Correct Answer
verified

Which event and date is mismatched?

Correct Answer
verified

Which of the following forms of energy was NOT involved in the production of large organic molecules in the primitive reducing atmosphere?

Correct Answer
verified

Africa,Asia,South America,and Antarctica share some patterns of primitive (fossil) plants and early reptiles,but do not have similar mammal populations.These findings

Correct Answer
verified

Exam 18: Origin and History of Life

Dinosaurs were the dominant group during the Mesozoic Era and many scientists believe that they were

Correct AnswerverifiedShow Answer

Fossils of prokaryotic cells are dated as far back as approximately _____ billion years ago.

Correct AnswerverifiedShow Answer

The synthesis of DNA or RNA from the organic soup would have been guided by the actions of enzymes in the

Correct AnswerverifiedShow Answer

The scientific study of fossils and what they reveal about prehistoric life in relation to ancient climates and environments is

Correct AnswerverifiedShow Answer

Who was the individual who proposed the hypothesis of continental drift during the 1920s?

Correct AnswerverifiedShow Answer

Which piece of evidence supports the hypothesis of continental drift?

Correct AnswerverifiedShow Answer

The first person who proposed that small organic molecules could have arisen by chemical evolution was

Correct AnswerverifiedShow Answer

When and where did the first multicellular protists evolve?

Correct AnswerverifiedShow Answer

Which of the following mass extinction events is correct?

Correct AnswerverifiedShow Answer

The time that it takes for half of a radioactive isotope to change into another stable element is its

Correct AnswerverifiedShow Answer

Which of the following lists of mass extinctions is correctly matched with the date of the extinction?

Correct AnswerverifiedShow Answer

Which event and date is mismatched?

Correct AnswerverifiedShow Answer

Which of the following forms of energy was NOT involved in the production of large organic molecules in the primitive reducing atmosphere?

Correct AnswerverifiedShow Answer

Africa,Asia,South America,and Antarctica share some patterns of primitive (fossil) plants and early reptiles,but do not have similar mammal populations.These findings

Correct AnswerverifiedShow Answer

Correct Answer
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