Question 1

Climate change has been linked to mass extinctions.

Accepted Answer

A) True 
 B)False

Question 2

RNA molecules that function as enzymes

Accepted Answer

A)  developed from protein- based enzymes. 
B)  are called ribozymes. 
C)  duplicate lipid molecules. 
D)  degrade proteins. 
E)  form primitive cells. 
A)  developed from protein- based enzymes. 
B)  are called ribozymes. 
C)  duplicate lipid molecules. 
D)  degrade proteins. 
E)  form primitive cells.

Question 3

A major human cultural innovation that happened about 10,000 years ago was the

Accepted Answer

A)  ability to think in abstract terms. 
B)  use of tools. 
C)  development of language. 
D)  development of self- expression in art forms. 
E)  development of domesticated crops and livestock. 
A)  ability to think in abstract terms. 
B)  use of tools. 
C)  development of language. 
D)  development of self- expression in art forms. 
E)  development of domesticated crops and livestock.

Question 4

The earliest photosynthetic organisms

Accepted Answer

A)  probably did not produce oxygen. 
B)  probably used water as a source of hydrogen. 
C)  date back to the time when life first emerged on Earth. 
D)  possessed chloroplasts. 
E)  probably used hydrogen sulfide as a source of hydrogen. 
A)  probably did not produce oxygen. 
B)  probably used water as a source of hydrogen. 
C)  date back to the time when life first emerged on Earth. 
D)  possessed chloroplasts. 
E)  probably used hydrogen sulfide as a source of hydrogen.

Question 5

Continental drift is caused by

Accepted Answer

A)  long- term weathering. 
B)  earthquakes. 
C)  plate tectonics. 
D)  ocean currents. 
E)  tidal forces. 
A)  long- term weathering. 
B)  earthquakes. 
C)  plate tectonics. 
D)  ocean currents. 
E)  tidal forces.

Question 6

The generally slow and steady succession of species on Earth has been interrupted by

Accepted Answer

A)  genetic equilibrium. 
B)  extreme specialization of a few species. 
C)  episodes of mass extinction. 
D)  balanced polymorphism. 
E)  unusually high rates of plate tectonics. 
A)  genetic equilibrium. 
B)  extreme specialization of a few species. 
C)  episodes of mass extinction. 
D)  balanced polymorphism. 
E)  unusually high rates of plate tectonics.

Question 7

To be classified as a eukaryote, an organism must have

Accepted Answer

A)  sexual reproduction. 
B)  centrioles. 
C)  internal membranes. 
D)  a cell wall. 
E)  flagella. 
A)  sexual reproduction. 
B)  centrioles. 
C)  internal membranes. 
D)  a cell wall. 
E)  flagella.

Question 8

Water- based photosynthesis converts carbon dioxide and which of the following to energy- containing molecules?

Accepted Answer

A)  Chlorophyll 
B)  Water 
C)  Hydrogen sulfide 
D)  Hydrogen bromide 
E)  Methane 
A)  Chlorophyll 
B)  Water 
C)  Hydrogen sulfide 
D)  Hydrogen bromide 
E)  Methane

Question 9

The human species first appeared in the

Accepted Answer

A)  Jurassic period. 
B)  Cretaceous period. 
C)  Permian period. 
D)  Quaternary period. 
E)  Tertiary period. 
A)  Jurassic period. 
B)  Cretaceous period. 
C)  Permian period. 
D)  Quaternary period. 
E)  Tertiary period.

Question 10

The extinction of the dinosaurs is thought to be due to a massive meteorite impact.

Accepted Answer

A) True 
 B)False

Question 11

-According the pictured phylogenetic tree, the common ancestor for all Homo species is

Accepted Answer

A)  Homo erectus. 
B)  Paranthropus boisei. 
C)  Australopthecus afarensis. 
D)  Homo habilis. 
E)  Homo ergaster. 
A)  Homo erectus. 
B)  Paranthropus boisei. 
C)  Australopthecus afarensis. 
D)  Homo habilis. 
E)  Homo ergaster.

Question 12

Homo heidelbergensis is believed to be the ancestor species of

Accepted Answer

A)  Homo neanderthalensis and Homo sapiens. 
B)  Homo ergaster and Homo sapiens. 
C)  Homo ergaster. 
D)  Homo sapiens. 
E)  Homo neanderthalensis. 
A)  Homo neanderthalensis and Homo sapiens. 
B)  Homo ergaster and Homo sapiens. 
C)  Homo ergaster. 
D)  Homo sapiens. 
E)  Homo neanderthalensis.

Question 13

Most scientists attribute the mass extinction of the dinosaurs to

Accepted Answer

A)  gradual climate change. 
B)  sunspots. 
C)  sea- level change. 
D)  predation by mammals. 
E)  meteorite impact. 
A)  gradual climate change. 
B)  sunspots. 
C)  sea- level change. 
D)  predation by mammals. 
E)  meteorite impact.

Question 14

If the Cretaceous mass extinction had not occurred, which group of animals would probably include the largest land animals today?

Accepted Answer

A)  Bony fish 
B)  Insects 
C)  Reptiles 
D)  Birds 
E)  Amphibians 
A)  Bony fish 
B)  Insects 
C)  Reptiles 
D)  Birds 
E)  Amphibians

Question 15

All surviving hominins belong to the species

Accepted Answer

A)  Homo robustus. 
B)  Homo habilis. 
C)  Homo sapiens. 
D)  Australopithecus robustus. 
E)  Homo erectus. 
A)  Homo robustus. 
B)  Homo habilis. 
C)  Homo sapiens. 
D)  Australopithecus robustus. 
E)  Homo erectus.

Question 16

The first terrestrial animals were probably

Accepted Answer

A)  reptiles. 
B)  mammals. 
C)  arthropods. 
D)  dinosaurs. 
E)  amphibians. 
A)  reptiles. 
B)  mammals. 
C)  arthropods. 
D)  dinosaurs. 
E)  amphibians.

Question 17

The outer boundaries of Miller and Urey's laboratory- created vesicles are most similar to

Accepted Answer

A)  bacteria. 
B)  cell membranes. 
C)  RNA. 
D)  complete cells. 
E)  amino acids. 
A)  bacteria. 
B)  cell membranes. 
C)  RNA. 
D)  complete cells. 
E)  amino acids.

Question 18

Laboratory research has shown that if a solution containing lipids and proteins is agitated for a long time, then hollow structures called vesicles are produced that resemble .

Accepted Answer

The answer of Laboratory research has shown that if a...

Question 19

Organisms that have complex internal membranes are prokaryotic.

Accepted Answer

A) True 
 B)False

Question 20

If early Earth's atmosphere contained little or no O2, then where did most of the O2 in our modern atmosphere come from?

Accepted Answer

A)  Respiration 
B)  The oxidation of metals 
C)  Photosynthesis 
D)  The breakdown of carbon dioxide 
E)  The splitting of water vapor by sunlight 
A)  Respiration 
B)  The oxidation of metals 
C)  Photosynthesis 
D)  The breakdown of carbon dioxide 
E)  The splitting of water vapor by sunlight

Exam 18: The History of Life

Climate change has been linked to mass extinctions.

RNA molecules that function as enzymes

A major human cultural innovation that happened about 10,000 years ago was the

The earliest photosynthetic organisms

Continental drift is caused by

The generally slow and steady succession of species on Earth has been interrupted by

To be classified as a eukaryote, an organism must have

Water- based photosynthesis converts carbon dioxide and which of the following to energy- containing molecules?

The human species first appeared in the

The extinction of the dinosaurs is thought to be due to a massive meteorite impact.

-According the pictured phylogenetic tree, the common ancestor for all Homo species is

Homo heidelbergensis is believed to be the ancestor species of

Most scientists attribute the mass extinction of the dinosaurs to

If the Cretaceous mass extinction had not occurred, which group of animals would probably include the largest land animals today?

All surviving hominins belong to the species

The first terrestrial animals were probably

The outer boundaries of Miller and Urey's laboratory- created vesicles are most similar to

Laboratory research has shown that if a solution containing lipids and proteins is agitated for a long time, then hollow structures called vesicles are produced that resemble .

Organisms that have complex internal membranes are prokaryotic.

If early Earth's atmosphere contained little or no O2, then where did most of the O2 in our modern atmosphere come from?

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity II: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

Filters

If early Earth's atmosphere contained little or no O₂, then where did most of the O₂ in our modern atmosphere come from?