Question 1

The chemical formula for molecular oxygen is

Accepted Answer

A)  O. 
B)  O2. 
C)  H2O2. 
D)  O3. 
E)  CO2. 
A)  O. 
B)  O2. 
C)  H2O2. 
D)  O3. 
E)  CO2.

Question 2

A prerequisite for the survival of life on land was the accumulation of a protective layer of

Accepted Answer

A)  O2 in the atmosphere. 
B)  CO2 in the atmosphere. 
C)  water vapor in the atmosphere. 
D)  ozone in the atmosphere. 
E)  bacteria in the soil. 
A)  O2 in the atmosphere. 
B)  CO2 in the atmosphere. 
C)  water vapor in the atmosphere. 
D)  ozone in the atmosphere. 
E)  bacteria in the soil.

Question 3

Scientists estimate that for more than _______ years after cells originated,all organisms consisted of one cell.

Accepted Answer

A)  250,000 
B)  2 million 
C)  200 million 
D)  2 billion 
E)  20 billion 
A)  250,000 
B)  2 million 
C)  200 million 
D)  2 billion 
E)  20 billion

Question 4

The toe pads of tree frogs and the spines of cacti are examples of

Accepted Answer

A)  behavioral traits. 
B)  structural adaptations. 
C)  sexually selected traits. 
D)  artificially selected traits.. 
E)  proximate explanations. 
A)  behavioral traits. 
B)  structural adaptations. 
C)  sexually selected traits. 
D)  artificially selected traits.. 
E)  proximate explanations.

Question 5

The Curiosity rover is currently searching for signs of life on Mars.What kind of evidence would most likely indicate the presence of living organisms on Mars?

Accepted Answer

A)  Fossilized prokaryotic cells 
B)  Different nucleic acids and amino acids than those found on Earth 
C)  Fatty acid molecules 
D)  Complex molecules containing genetic information 
E)  Simple organic molecules 
A)  Fossilized prokaryotic cells 
B)  Different nucleic acids and amino acids than those found on Earth 
C)  Fatty acid molecules 
D)  Complex molecules containing genetic information 
E)  Simple organic molecules

Question 6

Which of the following is the most probable order of appearance of molecules and structures that led to the evolution of life on Earth?

Accepted Answer

A)  Nucleic acids,proteins,membranes,cells 
B)  Proteins,membranes,nucleic acids,cells 
C)  Membranes,nucleic acids,proteins,cells 
D)  Cells,membranes,nucleic acids,proteins 
E)  Proteins,cells,nucleic acids,membranes 
A)  Nucleic acids,proteins,membranes,cells 
B)  Proteins,membranes,nucleic acids,cells 
C)  Membranes,nucleic acids,proteins,cells 
D)  Cells,membranes,nucleic acids,proteins 
E)  Proteins,cells,nucleic acids,membranes

Question 7

While going through a museum,you see the fossilized skeletons of the organisms listed below.Which one is a member of the genus that is our closest relative?

Accepted Answer

A)  Chimpanzee (Pan troglodytes) 
B)  Neanderthal (Homo neaderthalensis) 
C)  Lucy,a member of Australopithecus afarensis 
D)  Gorilla (Gorilla gorilla) 
E)  Gibbon (Hylobates lar) 
A)  Chimpanzee (Pan troglodytes) 
B)  Neanderthal (Homo neaderthalensis) 
C)  Lucy,a member of Australopithecus afarensis 
D)  Gorilla (Gorilla gorilla) 
E)  Gibbon (Hylobates lar)

Question 8

Use the following to answer questions :
Refer to the figure below.  
-In the image above,what is the smallest (lowest)level of biological organization that is visible?

Accepted Answer

A)  Community 
B)  Organism 
C)  Molecule 
D)  Cell 
E)  Population 
A)  Community 
B)  Organism 
C)  Molecule 
D)  Cell 
E)  Population

Question 9

Scientific explanations for a natural phenomenon

Accepted Answer

A)  can be tested only in the laboratory. 
B)  are always based on an ethical point of view. 
C)  are based on reproducible and quantifiable observations. 
D)  are based on hypotheses. 
E)  cannot be rejected. 
A)  can be tested only in the laboratory. 
B)  are always based on an ethical point of view. 
C)  are based on reproducible and quantifiable observations. 
D)  are based on hypotheses. 
E)  cannot be rejected.

Question 10

Comparative experiments are designed to answer questions that require

Accepted Answer

A)  experimental groups and control groups. 
B)  little or no data collection. 
C)  a final,definitive answer. 
D)  the collection of qualitative data. 
E)  observation and comparison rather than controlled variables. 
A)  experimental groups and control groups. 
B)  little or no data collection. 
C)  a final,definitive answer. 
D)  the collection of qualitative data. 
E)  observation and comparison rather than controlled variables.

Question 11

Which of the scientific names below is written correctly?

Accepted Answer

A)  homo sapiens 
B)  Branta Canadensis 
C)  Roundworm 
D)  Neanderthalensis homo 
E)  Canis lupis 
A)  homo sapiens 
B)  Branta Canadensis 
C)  Roundworm 
D)  Neanderthalensis homo 
E)  Canis lupis

Question 12

Ozone is important to life on Earth because it

Accepted Answer

A)  is used for aerobic metabolism. 
B)  can be used in place of oxygen. 
C)  helps block ultraviolet radiation. 
D)  provides energy to some basic forms of life. 
E)  sits in the lower atmosphere as a protective layer. 
A)  is used for aerobic metabolism. 
B)  can be used in place of oxygen. 
C)  helps block ultraviolet radiation. 
D)  provides energy to some basic forms of life. 
E)  sits in the lower atmosphere as a protective layer.

Question 13

Which question cannot be answered by means of the hypothesis‒prediction approach?

Accepted Answer

A)  Are eastern meadowlark populations declining faster than western meadowlark populations? 
B)  Is the song of the western meadowlark prettier than that of the eastern meadowlark? 
C)  Do eastern and western meadowlarks interbreed? 
D)  Do meadowlarks benefit from prairie habitat restoration? 
E)  Have the migration paths of western meadowlarks been affected by climate change? 
A)  Are eastern meadowlark populations declining faster than western meadowlark populations? 
B)  Is the song of the western meadowlark prettier than that of the eastern meadowlark? 
C)  Do eastern and western meadowlarks interbreed? 
D)  Do meadowlarks benefit from prairie habitat restoration? 
E)  Have the migration paths of western meadowlarks been affected by climate change?

Question 14

Refer to the figure below showing a community containing voles,grass,owls,and foxes.In this community,interactions determine the number of voles.What would initially happen to this community if foxes were removed?

Accepted Answer

A)  The number of owls would diminish. 
B)  The number of voles would diminish. 
C)  The abundance of grass would increase. 
D)  The community would collapse. 
E)  The number of voles would increase. 
A)  The number of owls would diminish. 
B)  The number of voles would diminish. 
C)  The abundance of grass would increase. 
D)  The community would collapse. 
E)  The number of voles would increase.

Question 15

Cells

Accepted Answer

A)  are composed of many types of tissues. 
B)  are found in plants and animals,but not bacteria. 
C)  are the smallest entity studied by biologists. 
D)  can be building blocks for complex organisms. 
E)  must contain DNA within a nucleus. 
A)  are composed of many types of tissues. 
B)  are found in plants and animals,but not bacteria. 
C)  are the smallest entity studied by biologists. 
D)  can be building blocks for complex organisms. 
E)  must contain DNA within a nucleus.

Question 16

Use the following to answer questions :
Refer to the figure below showing a tree of life.  
-From the figure you can conclude that plants evolved from

Accepted Answer

A)  protists. 
B)  endosymbiotic bacteria. 
C)  mitochondria. 
D)  Bacteria. 
E)  Archaea. 
A)  protists. 
B)  endosymbiotic bacteria. 
C)  mitochondria. 
D)  Bacteria. 
E)  Archaea.

Question 17

Which statement about evolution is true?

Accepted Answer

A)  The diversity of life depends on the existence of similar environments and ecological communities throughout the globe. 
B)  Sexual selection contributes to the diversity of life. 
C)  Earth has existed and changed over a few thousand years,at most. 
D)  All ancestral forms of life were very similar to organisms that currently exist. 
E)  Some organisms that exist do not share common ancestors with other organisms. 
A)  The diversity of life depends on the existence of similar environments and ecological communities throughout the globe. 
B)  Sexual selection contributes to the diversity of life. 
C)  Earth has existed and changed over a few thousand years,at most. 
D)  All ancestral forms of life were very similar to organisms that currently exist. 
E)  Some organisms that exist do not share common ancestors with other organisms.

Question 18

Plants are _______ organisms that are _______ of oxygen production.

Accepted Answer

A)  eukaryotic unicellular;capable 
B)  eukaryotic multicellular;incapable 
C)  prokaryotic multicellular;capable 
D)  prokaryotic unicellular;incapable 
E)  eukaryotic multicellular;capable 
A)  eukaryotic unicellular;capable 
B)  eukaryotic multicellular;incapable 
C)  prokaryotic multicellular;capable 
D)  prokaryotic unicellular;incapable 
E)  eukaryotic multicellular;capable

Question 19

Which statement about the scientific method is true?

Accepted Answer

A)  After forming a hypothesis,scientists apply logic to make predictions from the hypothesis. 
B)  The most informative experiments are those that have the ability to show that a hypothesis is correct. 
C)  In a comparative experiment,a scientist compares groups that differ in terms of a variable that has been manipulated in one of the groups and left unaltered in the other group. 
D)  Controlled experiments are valuable when we do not know or cannot control the critical variables. 
E)  A statistical test of a hypothesis starts with the premise that a significant difference exists between the groups in the study. 
A)  After forming a hypothesis,scientists apply logic to make predictions from the hypothesis. 
B)  The most informative experiments are those that have the ability to show that a hypothesis is correct. 
C)  In a comparative experiment,a scientist compares groups that differ in terms of a variable that has been manipulated in one of the groups and left unaltered in the other group. 
D)  Controlled experiments are valuable when we do not know or cannot control the critical variables. 
E)  A statistical test of a hypothesis starts with the premise that a significant difference exists between the groups in the study.

Question 20

Natural selection acts

Accepted Answer

A)  by causing mutations in the genome. 
B)  by producing structural and functional changes within organisms. 
C)  through differential probabilities of survival and reproductive success. 
D)  through the selection of breeding pairs that produce offspring with specialized characteristics. 
E)  by allowing unlimited growth of populations. 
A)  by causing mutations in the genome. 
B)  by producing structural and functional changes within organisms. 
C)  through differential probabilities of survival and reproductive success. 
D)  through the selection of breeding pairs that produce offspring with specialized characteristics. 
E)  by allowing unlimited growth of populations.

Exam 1: Introduction

The chemical formula for molecular oxygen is

A prerequisite for the survival of life on land was the accumulation of a protective layer of

Scientists estimate that for more than _______ years after cells originated,all organisms consisted of one cell.

The toe pads of tree frogs and the spines of cacti are examples of

The Curiosity rover is currently searching for signs of life on Mars.What kind of evidence would most likely indicate the presence of living organisms on Mars?

Which of the following is the most probable order of appearance of molecules and structures that led to the evolution of life on Earth?

While going through a museum,you see the fossilized skeletons of the organisms listed below.Which one is a member of the genus that is our closest relative?

Use the following to answer questions : Refer to the figure below. -In the image above,what is the smallest (lowest)level of biological organization that is visible?

Scientific explanations for a natural phenomenon

Comparative experiments are designed to answer questions that require

Which of the scientific names below is written correctly?

Ozone is important to life on Earth because it

Which question cannot be answered by means of the hypothesis‒prediction approach?

Refer to the figure below showing a community containing voles,grass,owls,and foxes.In this community,interactions determine the number of voles.What would initially happen to this community if foxes were removed?

Cells

Use the following to answer questions : Refer to the figure below showing a tree of life. -From the figure you can conclude that plants evolved from

Which statement about evolution is true?

Plants are _______ organisms that are _______ of oxygen production.

Which statement about the scientific method is true?

Natural selection acts

The Chemistry and Energy of Life

Nucleic Acids, Proteins, and Enzymes

Cells: the Working Units of Life

Cell Membranes and Signaling

Pathways That Harvest and Store Chemical Energy

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

DNA and Its Role in Heredity

From Dna to Protein: Gene Expression

Regulation of Gene Expression

Genomes

Biotechnology

Genes, Development, and Evolution

Processes of Evolution

Reconstructing and Using Phylogenies

Speciation

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

The Evolution of Plants

The Evolution and Diversity of Fungi

Animal Origins and Diversity

The Plant Body

Plant Nutrition and Transport

Plant Growth and Development

Reproduction of Flowering Plants

Plants in the Environment

Fundamentals of Animal Function

Nutrition and Digestion

Breathing

Circulation

Muscle and Movement

Neurons, Sense Organs, and Nervous Systems

Nervous and Endocrine Control

Water and Salts: Excretion

Animal Reproduction

Animal Development

Immunology: Animal Defense Systems

Animal Behavior

The Distribution of Earths Ecological Systems

Populations

Ecological and Evolutionary Consequences of Interactions Within and Among Species

Ecological Communities

The Global Ecosystem

Filters

Plants are _ organisms that are _ of oxygen production.