Question 1

All of the following statements about the evolution of life on Earth are TRUE,EXCEPT

Accepted Answer

A)  evolution has involved several mass extinctions followed by periods of diversification. 
B)  the first diversification of animal life occurred during the Cenozoic era. 
C)  when life colonizes new habitats, it rapidly diversifies into new species. 
D)  the dinosaurs most likely went extinct when a huge asteroid crashed into Earth. 
E)  oxygen only became abundant in the atmosphere as a result of the evolution of photosynthetic organisms. 
A)  evolution has involved several mass extinctions followed by periods of diversification. 
B)  the first diversification of animal life occurred during the Cenozoic era. 
C)  when life colonizes new habitats, it rapidly diversifies into new species. 
D)  the dinosaurs most likely went extinct when a huge asteroid crashed into Earth. 
E)  oxygen only became abundant in the atmosphere as a result of the evolution of photosynthetic organisms. B

Question 2

Write T for true and F for false after each statement.
A. Penguins may be found close to the equator.
B. Penguins may be found in the Arctic.
C. Polar bears inhabit Antarctica.
D. Polar bears and penguins may once have lived on the same continent.
E. The continents are still moving.

Accepted Answer

Penguins may be found close to the equator.(True)
Penguins may be found in the Arctic.(False)
Polar bears inhabit Antarctica.(False)
Polar bears and penguins may once have lived on the same continent.(True)
The continents are still moving.(True)

Question 3

Which of the following is the smallest level of classification?

Accepted Answer

A)  order 
B)  genus 
C)  family 
D)  phylum 
E)  species 
A)  order 
B)  genus 
C)  family 
D)  phylum 
E)  species E

Question 4

Which ratio is NOT analyzed for radiometric analysis?

Accepted Answer

A)  rubidium-strontium 
B)  uranium-lead 
C)  potassium-argon 
D)  carbon-nitrogen 
E)  uranium-nitrogen 
A)  rubidium-strontium 
B)  uranium-lead 
C)  potassium-argon 
D)  carbon-nitrogen 
E)  uranium-nitrogen

Question 5

Uranium-238 has a half-life of 4.5 billion years.You have a rock that formed with 100,000 uranium-238 molecules.How many uranium-238 molecules will be left in 4.5 billion years?

Accepted Answer

A)  100,000 
B)  75,000 
C)  50,000 
D)  25,000 
E)  0 
A)  100,000 
B)  75,000 
C)  50,000 
D)  25,000 
E)  0

Question 6

Why would it be unlikely to find a rock with 90% lead-206?

Accepted Answer

A rock with that much lead-206

Question 7

-Based on the diagram above,compare how closely related monotremes and snakes are to marsupials.

Accepted Answer

Monotremes and marsupials shar

Question 8

Of the taxonomic categories below,which has the least number of organisms or least inclusive category?

Accepted Answer

A)  kingdom 
B)  order 
C)  domain 
D)  phylum 
E)  class 
A)  kingdom 
B)  order 
C)  domain 
D)  phylum 
E)  class

Question 9

Which of the following BEST describes the current distribution of life on Earth?

Accepted Answer

A)  The distribution of species is determined by the current habitat and climate. 
B)  The distribution of species is determined by the habitat and climate that prevailed millions of years ago. 
C)  The distribution of species is determined by where species occurred when Earth's landmasses moved and separated from each other. 
D)  The distribution of species is determined by ancient and modern barriers to dispersal. 
E)  All of the above. 
A)  The distribution of species is determined by the current habitat and climate. 
B)  The distribution of species is determined by the habitat and climate that prevailed millions of years ago. 
C)  The distribution of species is determined by where species occurred when Earth's landmasses moved and separated from each other. 
D)  The distribution of species is determined by ancient and modern barriers to dispersal. 
E)  All of the above.

Question 10

Earth is estimated to be around

Accepted Answer

A)  6,000-8,000 years old. 
B)  4,000-6,000 years old. 
C)  4,600,000 years old. 
D)  4,600,000,000 years old. 
E)  4,600,000,000,000 years old. 
A)  6,000-8,000 years old. 
B)  4,000-6,000 years old. 
C)  4,600,000 years old. 
D)  4,600,000,000 years old. 
E)  4,600,000,000,000 years old.

Question 11

What are the causes of mass extinction?

Accepted Answer

Mass extinction occurs when the planet c

Question 12

Which of the following radioactive isotopes is used to date organic remains?

Accepted Answer

A)  carbon-14 
B)  potassium-40 
C)  rubidium-87 
D)  uranium-238 
E)  lead-206 
A)  carbon-14 
B)  potassium-40 
C)  rubidium-87 
D)  uranium-238 
E)  lead-206

Question 13

About _____ million organisms on the planet have been formally named.

Accepted Answer

A)  100 
B)  5 
C)  30 
D)  1.8 
E)  4.6 
A)  100 
B)  5 
C)  30 
D)  1.8 
E)  4.6

Question 14

Which element has the shortest half-life?

Accepted Answer

A)  rubidium-87 
B)  lead-214 
C)  uranium-238 
D)  carbon-14 
E)  potassium-40 
A)  rubidium-87 
B)  lead-214 
C)  uranium-238 
D)  carbon-14 
E)  potassium-40

Question 15

Forests of large seedless plants dominated the planet during the _____ period.

Accepted Answer

A)  Cambrian 
B)  Jurassic 
C)  Cretaceous 
D)  Carboniferous 
E)  Tertiary 
A)  Cambrian 
B)  Jurassic 
C)  Cretaceous 
D)  Carboniferous 
E)  Tertiary

Question 16

Which of the following places the classification levels of species in the correct order from broadest category to most specific?

Accepted Answer

A)  kingdom→class→order→phylum→genus→family→species 
B)  kingdom→phylum→class→order→family→genus→species 
C)  kingdom→phylum→order→family→class→species→genus 
D)  phylum→kingdom→order→class→family→genus→species 
E)  phylum→family→class→kingdom→order→genus→species 
A)  kingdom→class→order→phylum→genus→family→species 
B)  kingdom→phylum→class→order→family→genus→species 
C)  kingdom→phylum→order→family→class→species→genus 
D)  phylum→kingdom→order→class→family→genus→species 
E)  phylum→family→class→kingdom→order→genus→species

Question 17

All of the following are true of phylogenetic trees,EXCEPT

Accepted Answer

A)  more primitive species are near the bottom, while more modern species are at the tips. 
B)  a node represents the last common ancestor of the species above that point in the tree. 
C)  phylogenetic trees show the evolutionary relationships among species. 
D)  DNA evidence has been very useful in determining relationships among species. 
E)  extinct species are never included in phylogenetic trees. 
A)  more primitive species are near the bottom, while more modern species are at the tips. 
B)  a node represents the last common ancestor of the species above that point in the tree. 
C)  phylogenetic trees show the evolutionary relationships among species. 
D)  DNA evidence has been very useful in determining relationships among species. 
E)  extinct species are never included in phylogenetic trees.

Question 18

-Based on the information in the graph,approximately how old are two rocks,one containing 25% uranium-238 and 75% lead,and one containing 50% uranium-238 and 50% lead?

Accepted Answer

A)  around 2.25 billion years and 4.5 billion years, respectively 
B)  around 9 billion years and 4.5 billion years, respectively 
C)  around 1.3 billion years and 2.4 billion years, respectively 
D)  around 4.5 billion years and 9 billion years, respectively 
E)  The question cannot be answered with the information provided. 
A)  around 2.25 billion years and 4.5 billion years, respectively 
B)  around 9 billion years and 4.5 billion years, respectively 
C)  around 1.3 billion years and 2.4 billion years, respectively 
D)  around 4.5 billion years and 9 billion years, respectively 
E)  The question cannot be answered with the information provided.

Question 19

Why do scientists have a difficult time estimating the total number of species on Earth?

Accepted Answer

Scientists have a difficult time estimat

Question 20

About 25,000 species of fish have currently been named and identified.This means that fish make up about what percentage of vertebrate species?

Accepted Answer

A)  10% 
B)  25% 
C)  40% 
D)  50% 
E)  75% 
A)  10% 
B)  25% 
C)  40% 
D)  50% 
E)  75%

Exam 17: Life on Earth Qa: Evolution

All of the following statements about the evolution of life on Earth are TRUE,EXCEPT

Write T for true and F for false after each statement. A. Penguins may be found close to the equator. B. Penguins may be found in the Arctic. C. Polar bears inhabit Antarctica. D. Polar bears and penguins may once have lived on the same continent. E. The continents are still moving.

Which of the following is the smallest level of classification?

Which ratio is NOT analyzed for radiometric analysis?

Uranium-238 has a half-life of 4.5 billion years.You have a rock that formed with 100,000 uranium-238 molecules.How many uranium-238 molecules will be left in 4.5 billion years?

Why would it be unlikely to find a rock with 90% lead-206?

-Based on the diagram above,compare how closely related monotremes and snakes are to marsupials.

Of the taxonomic categories below,which has the least number of organisms or least inclusive category?

Which of the following BEST describes the current distribution of life on Earth?

Earth is estimated to be around

What are the causes of mass extinction?

Which of the following radioactive isotopes is used to date organic remains?

About _____ million organisms on the planet have been formally named.

Which element has the shortest half-life?

Forests of large seedless plants dominated the planet during the _____ period.

Which of the following places the classification levels of species in the correct order from broadest category to most specific?

All of the following are true of phylogenetic trees,EXCEPT

-Based on the information in the graph,approximately how old are two rocks,one containing 25% uranium-238 and 75% lead,and one containing 50% uranium-238 and 50% lead?

Why do scientists have a difficult time estimating the total number of species on Earth?

About 25,000 species of fish have currently been named and identified.This means that fish make up about what percentage of vertebrate species?

The Process of Science Java Report

Chemistry and Molecules of Life Mission to Mars

Cell Function and Structure Wonder Drug

Nutrition,metabolism,enzymes the Peanut Butter Project

Energy Flow and Photosynthesis the Future of Fuel

Dietary Energy and Cellular Respiration Supersize Me

DNA Structure and Replication Biologically Unique

Genes to Proteins Medicine From Milk

Cell Division and Mitosis Natures Pharmacy

Mutations and Cancer Fighting Fate

Single-Gene Inheritance and Meiosis Rock for a Cause

Complex Inheritance Qa: Genetics

Stem Cells and Cell Differentiation Grow Your Own

Natural Selection and Adaptation Bugs That Resist Drugs

A: Nonadaptive Evolution and Speciation Urban Evolution

B: Nonadaptive Evolution and Speciation Urban Evolution

Evidence for Evolution a Fish With Fingers

Prokaryotic Diversity Lost City

A: Eukaryotic Diversity Rain Forest Riches

B: Eukaryotic Diversity Rain Forest Riches

Human Evolution Skin Deep

A: Population Ecology on the Tracks of Wolves and Moose

B: Population Ecology on the Tracks of Wolves and Moose

A: Community Ecology Whats Happening to Honey Bees

B: Community Ecology Whats Happening to Honey Bees

A: Ecosystem Ecology the Heat Is on

B: Ecosystem Ecology the Heat Is on

A: Sustainability the Makings of a Green City

B: Sustainability the Makings of a Green City

A: Overview of Physiology Man Versus Mountain

B: Overview of Physiology Man Versus Mountain

Digestive System Drastic Measures

A: Cardiovascular System Death in Bogalusa

B: Cardiovascular System Death in Bogalusa

Respiratory System Peak Performance

A: Central Nervous System Smoke on the Brain

B: Central Nervous System Smoke on the Brain

Reproductive System Too Many Multiples

Immune System Viral Mysteries

A: Plant Physiology

B: Plant Physiology

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