Question 1

How does water dissolve table salt?

Accepted Answer

A)  Water is a polar molecule that disrupts hydrogen bonds between sodium and chloride. 
B)  Water is a nonpolar molecule that dissolves covalent bonds between sodium and chloride. 
C)  Water is a polar molecule that disrupts ionic bonds between sodium and chloride. 
D)  Water is a polar molecule that takes electrons from sodium chloride. 
E)  Water is a nonpolar molecule that breaks the ionic bonds between sodium and chloride. 
A)  Water is a polar molecule that disrupts hydrogen bonds between sodium and chloride. 
B)  Water is a nonpolar molecule that dissolves covalent bonds between sodium and chloride. 
C)  Water is a polar molecule that disrupts ionic bonds between sodium and chloride. 
D)  Water is a polar molecule that takes electrons from sodium chloride. 
E)  Water is a nonpolar molecule that breaks the ionic bonds between sodium and chloride.

Question 2

Select the true statements about Mitochondrial Eve.Select the TWO answers that are correct.

Accepted Answer

A)  She lived approximately 75,000 years ago in ancient Europe. 
B)  She is the common female ancestor of all humans living today. 
C)  She was the first human female in the history of evolution. 
D)  No other mitochondrial DNA but hers has survived thousands of generations. 
E)  She was the only human female to leave descendants. 
A)  She lived approximately 75,000 years ago in ancient Europe. 
B)  She is the common female ancestor of all humans living today. 
C)  She was the first human female in the history of evolution. 
D)  No other mitochondrial DNA but hers has survived thousands of generations. 
E)  She was the only human female to leave descendants.

Question 3

What happens to plants in the absence of light? Select the TWO answers that are correct.

Accepted Answer

A)  Chemical energy is produced using only water and carbon dioxide. 
B)  Plants stop generating chemical energy from light. 
C)  Chloroplasts use the energy in glucose to photosynthesize. 
D)  The process of photosynthesis shuts down. 
E)  Plants begin converting sugars into fats and proteins. 
A)  Chemical energy is produced using only water and carbon dioxide. 
B)  Plants stop generating chemical energy from light. 
C)  Chloroplasts use the energy in glucose to photosynthesize. 
D)  The process of photosynthesis shuts down. 
E)  Plants begin converting sugars into fats and proteins.

Question 4

Why is the phospholipid bilayer important to cell survival? Select the TWO answers that are correct.

Accepted Answer

A)  It acts as a barrier for some,but not all,molecules on either side of it. 
B)  It maintains homeostasis by forming an insulating layer around the cell. 
C)  It anchors nucleotides together as they form molecules of DNA. 
D)  It blocks small,nonpolar molecules from entering the cell and harming it. 
E)  It separates the cellular environment from the external environment. 
A)  It acts as a barrier for some,but not all,molecules on either side of it. 
B)  It maintains homeostasis by forming an insulating layer around the cell. 
C)  It anchors nucleotides together as they form molecules of DNA. 
D)  It blocks small,nonpolar molecules from entering the cell and harming it. 
E)  It separates the cellular environment from the external environment.

Question 5

What strategies have plants evolved for seed dispersal? Select the THREE answers that are correct.

Accepted Answer

A)  A few plants have seeds that can creep along the ground. 
B)  Exploding seed pods can launch seeds away. 
C)  Some seeds can be carried away by wind or water. 
D)  Many plants use animals to transport seeds. 
E)  Pollinators carry seeds from one plant to another. 
A)  A few plants have seeds that can creep along the ground. 
B)  Exploding seed pods can launch seeds away. 
C)  Some seeds can be carried away by wind or water. 
D)  Many plants use animals to transport seeds. 
E)  Pollinators carry seeds from one plant to another.

Question 6

Select three possible ways mutations can be acquired.Select the THREE answers that are correct.

Accepted Answer

A)  transcribing DNA incorrectly during protein synthesis 
B)  leaving mistakes uncorrected during DNA replication 
C)  being exposed to substances that damage DNA 
D)  receiving mutations through a vaccination 
E)  inheriting mutations from one's parents 
A)  transcribing DNA incorrectly during protein synthesis 
B)  leaving mistakes uncorrected during DNA replication 
C)  being exposed to substances that damage DNA 
D)  receiving mutations through a vaccination 
E)  inheriting mutations from one's parents

Question 7

Which ancestor of the modern-day horse is also the closest common ancestor to Parahippus?

Accepted Answer

A)  Calippus 
B)  Orohippus 
C)  Miohippus 
D)  Epihippus 
E)  Hypohippus 
A)  Calippus 
B)  Orohippus 
C)  Miohippus 
D)  Epihippus 
E)  Hypohippus

Question 8

What is the role of sodium and potassium ions in transmitting a signal down the axon?

Accepted Answer

A)  They coat the myelin sheath to help prevent the signal from leaking away. 
B)  They cause a change in the electrical charge difference across the cell membrane. 
C)  They surround the axon terminals and attract the electrical signal to the synapse. 
D)  They enter the cell membrane with water to prevent any charge difference. 
E)  They flow out of the axon and are taken up by nearby cells. 
A)  They coat the myelin sheath to help prevent the signal from leaking away. 
B)  They cause a change in the electrical charge difference across the cell membrane. 
C)  They surround the axon terminals and attract the electrical signal to the synapse. 
D)  They enter the cell membrane with water to prevent any charge difference. 
E)  They flow out of the axon and are taken up by nearby cells.

Question 9

Which of the following is an example of gene flow?

Accepted Answer

A)  selective breeding of dairy cows to produce animals that can live in tropical climates and yield higher volumes of milk 
B)  the carriage of seeds between two separate urban forests by wildlife such as squirrels and rats that travel back and forth between the two 
C)  cross pollination by migrating honey bees between two geographically separate but genetically identical cotton fields 
D)  the passage of a recessive disease-causing allele from one generation to the next without the physical appearance of disease 
E)  the introduction of Burmese pythons,with no known predators or compatible mates,into the Florida Everglades 
A)  selective breeding of dairy cows to produce animals that can live in tropical climates and yield higher volumes of milk 
B)  the carriage of seeds between two separate urban forests by wildlife such as squirrels and rats that travel back and forth between the two 
C)  cross pollination by migrating honey bees between two geographically separate but genetically identical cotton fields 
D)  the passage of a recessive disease-causing allele from one generation to the next without the physical appearance of disease 
E)  the introduction of Burmese pythons,with no known predators or compatible mates,into the Florida Everglades

Question 10

How does mushroom reproduction differ from yeast and mold reproduction?

Accepted Answer

A)  Mushroom reproduction does not involve spores. 
B)  Mushroom reproduction is asexual only. 
C)  Mushroom reproduction involves seed-bearing fruit. 
D)  Mushroom reproduction is both sexual and asexual. 
E)  Mushroom reproduction is sexual only. 
A)  Mushroom reproduction does not involve spores. 
B)  Mushroom reproduction is asexual only. 
C)  Mushroom reproduction involves seed-bearing fruit. 
D)  Mushroom reproduction is both sexual and asexual. 
E)  Mushroom reproduction is sexual only.

Question 11

What cellular machinery is involved in translation? Select the TWO answers that are correct.

Accepted Answer

A)  mRNA 
B)  cell membrane 
C)  mitochondria 
D)  nucleus 
E)  ribosome 
A)  mRNA 
B)  cell membrane 
C)  mitochondria 
D)  nucleus 
E)  ribosome

Question 12

How do haploid gametes result in diploid offspring?

Accepted Answer

A)  A diploid sperm fertilizes a diploid egg,and the resulting diploid zygote then grows by mitosis to form an embryo. 
B)  A haploid egg and a haploid sperm fuse to form a diploid zygote that grows by meiosis after fertilization. 
C)  A diploid egg and a diploid sperm fuse,undergo meiosis once to form a diploid zygote,which grows by mitosis. 
D)  A diploid egg and a diploid sperm undergo fertilization to form a diploid zygote that grows through meiosis. 
E)  A haploid egg and a haploid sperm fuse to form a diploid zygote that grows by mitosis after fertilization. 
A)  A diploid sperm fertilizes a diploid egg,and the resulting diploid zygote then grows by mitosis to form an embryo. 
B)  A haploid egg and a haploid sperm fuse to form a diploid zygote that grows by meiosis after fertilization. 
C)  A diploid egg and a diploid sperm fuse,undergo meiosis once to form a diploid zygote,which grows by mitosis. 
D)  A diploid egg and a diploid sperm undergo fertilization to form a diploid zygote that grows through meiosis. 
E)  A haploid egg and a haploid sperm fuse to form a diploid zygote that grows by mitosis after fertilization.

Question 13

What are the products of double fertilization?

Accepted Answer

A)  One sperm fertilizes more than one egg,which increases the effectiveness of individual pollen grains. 
B)  One sperm fertilizes the eggs,and the remaining unfertilized eggs develop into endosperm. 
C)  One sperm fertilizes the egg,and a second sperm fuses with non-egg cells to become the endosperm. 
D)  Two sperm fertilize one egg,which produces offspring with variable numbers of chromosomes. 
E)  Two sperm fertilize two eggs,which will produce a seed with two embryos and two endosperm. 
A)  One sperm fertilizes more than one egg,which increases the effectiveness of individual pollen grains. 
B)  One sperm fertilizes the eggs,and the remaining unfertilized eggs develop into endosperm. 
C)  One sperm fertilizes the egg,and a second sperm fuses with non-egg cells to become the endosperm. 
D)  Two sperm fertilize one egg,which produces offspring with variable numbers of chromosomes. 
E)  Two sperm fertilize two eggs,which will produce a seed with two embryos and two endosperm.

Question 14

How is the polarity of water important for transpiration?

Accepted Answer

A)  Polarity causes cohesion between molecules of water so they pull one another as they move up. 
B)  Polarity causes repulsion between water molecules for evaporation from the surface of the leaves. 
C)  Polarity causes water molecules to push apart so that they are moved upward through the plant. 
D)  Polarity causes water molecules to adhere to xylem cells so that gravity is countered and water moves upward. 
E)  Polarity enhances gravity and allows water to move more easily downward from the leaves to the roots. 
A)  Polarity causes cohesion between molecules of water so they pull one another as they move up. 
B)  Polarity causes repulsion between water molecules for evaporation from the surface of the leaves. 
C)  Polarity causes water molecules to push apart so that they are moved upward through the plant. 
D)  Polarity causes water molecules to adhere to xylem cells so that gravity is countered and water moves upward. 
E)  Polarity enhances gravity and allows water to move more easily downward from the leaves to the roots.

Question 15

A researcher who is studying the behavior of lions interacting with zebras is interested in what level of ecology?

Accepted Answer

A)  community 
B)  population 
C)  individual 
D)  species 
E)  ecosystem 
A)  community 
B)  population 
C)  individual 
D)  species 
E)  ecosystem

Question 16

Why are chloroplasts essential to the survival of many animals as well as plants?

Accepted Answer

A)  Photosynthesis generates protein building blocks essential to animal functioning that cannot be acquired by animals in any other way. 
B)  Animals do not have chloroplasts and must depend on organisms that can photosynthesize the energy they need. 
C)  Chloroplasts allow both animals and plants to break down organic molecules and use the energy stored in the molecules. 
D)  Many animals can only produce their own energy after they have consumed sufficient photosynthetic chloroplasts. 
E)  Chloroplasts are rich in fats and lipids that are generated by photosynthesis satisfying the energy requirements of many animals. 
A)  Photosynthesis generates protein building blocks essential to animal functioning that cannot be acquired by animals in any other way. 
B)  Animals do not have chloroplasts and must depend on organisms that can photosynthesize the energy they need. 
C)  Chloroplasts allow both animals and plants to break down organic molecules and use the energy stored in the molecules. 
D)  Many animals can only produce their own energy after they have consumed sufficient photosynthetic chloroplasts. 
E)  Chloroplasts are rich in fats and lipids that are generated by photosynthesis satisfying the energy requirements of many animals.

Question 17

Which statements describe catabolic and anabolic reactions? Select the TWO answers that are correct.

Accepted Answer

A)  Catabolic reactions remove chemical bonds and result in larger substances being broken down into smaller ones. 
B)  Catabolic reactions add chemical bonds and result in the formation of tissues and the enzymes used in digestion. 
C)  Catabolic reactions add chemical bonds and result in smaller molecules being built up into larger ones. 
D)  Anabolic reactions remove chemical bonds and result in larger substances being broken down into smaller ones. 
E)  Anabolic reactions add chemical bonds and result in smaller molecules being built up into larger ones. 
A)  Catabolic reactions remove chemical bonds and result in larger substances being broken down into smaller ones. 
B)  Catabolic reactions add chemical bonds and result in the formation of tissues and the enzymes used in digestion. 
C)  Catabolic reactions add chemical bonds and result in smaller molecules being built up into larger ones. 
D)  Anabolic reactions remove chemical bonds and result in larger substances being broken down into smaller ones. 
E)  Anabolic reactions add chemical bonds and result in smaller molecules being built up into larger ones.

Question 18

Select the statements that correctly describe how a new DNA molecule reflects the original DNA molecule from which it was copied.Select the TWO answers that are correct.

Accepted Answer

A)  DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original. 
B)  The nitrogenous bases in the new DNA molecule are A,T,G,and C,but the original molecule contains A,U,G,and C. 
C)  Each new DNA molecule contains an original strand and a newly synthesized strand. 
D)  The two DNA molecules are exact opposites of each other according to base pairs. 
E)  Base pairing rules duplicate the base pairs of the original molecule in the new molecule. 
A)  DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original. 
B)  The nitrogenous bases in the new DNA molecule are A,T,G,and C,but the original molecule contains A,U,G,and C. 
C)  Each new DNA molecule contains an original strand and a newly synthesized strand. 
D)  The two DNA molecules are exact opposites of each other according to base pairs. 
E)  Base pairing rules duplicate the base pairs of the original molecule in the new molecule.

Question 19

How does the molecular structure of a water molecule affect its polarity?

Accepted Answer

A)  The oxygen has a partial positive charge and the hydrogens have a partial negative charge,yielding a weakly polar water molecule that can form hydrogen bonds. 
B)  The oxygen has a partial negative charge and the hydrogens have a partial positive charge,yielding a weakly polar water molecule that can form hydrogen bonds. 
C)  The oxygen and hydrogen rapidly exchange electrons in their outermost energy shells,producing structures that can form hydrogen bonds. 
D)  The oxygen takes an electron from each hydrogen,yielding a negatively charged oxygen and two positively charged hydrogens that can form hydrogen bonds. 
E)  The oxygen donates an electron to each hydrogen,yielding a positively charged oxygen and two negatively charged hydrogens that can form hydrogen bonds. 
A)  The oxygen has a partial positive charge and the hydrogens have a partial negative charge,yielding a weakly polar water molecule that can form hydrogen bonds. 
B)  The oxygen has a partial negative charge and the hydrogens have a partial positive charge,yielding a weakly polar water molecule that can form hydrogen bonds. 
C)  The oxygen and hydrogen rapidly exchange electrons in their outermost energy shells,producing structures that can form hydrogen bonds. 
D)  The oxygen takes an electron from each hydrogen,yielding a negatively charged oxygen and two positively charged hydrogens that can form hydrogen bonds. 
E)  The oxygen donates an electron to each hydrogen,yielding a positively charged oxygen and two negatively charged hydrogens that can form hydrogen bonds.

Question 20

What characteristics does a scientific hypothesis have? Select the TWO answers that are correct.

Accepted Answer

A)  The hypothesis is something that can be tested. 
B)  The hypothesis contains a supernatural element. 
C)  The hypothesis could be proven false. 
D)  The hypothesis is based on an opinion. 
E)  The hypothesis has already been proven correct. 
A)  The hypothesis is something that can be tested. 
B)  The hypothesis contains a supernatural element. 
C)  The hypothesis could be proven false. 
D)  The hypothesis is based on an opinion. 
E)  The hypothesis has already been proven correct.

Exam 33: A Range of Biology

How does water dissolve table salt?

Select the true statements about Mitochondrial Eve.Select the TWO answers that are correct.

What happens to plants in the absence of light? Select the TWO answers that are correct.

Why is the phospholipid bilayer important to cell survival? Select the TWO answers that are correct.

What strategies have plants evolved for seed dispersal? Select the THREE answers that are correct.

Select three possible ways mutations can be acquired.Select the THREE answers that are correct.

Which ancestor of the modern-day horse is also the closest common ancestor to Parahippus?

What is the role of sodium and potassium ions in transmitting a signal down the axon?

Which of the following is an example of gene flow?

How does mushroom reproduction differ from yeast and mold reproduction?

What cellular machinery is involved in translation? Select the TWO answers that are correct.

How do haploid gametes result in diploid offspring?

What are the products of double fertilization?

How is the polarity of water important for transpiration?

A researcher who is studying the behavior of lions interacting with zebras is interested in what level of ecology?

Why are chloroplasts essential to the survival of many animals as well as plants?

Which statements describe catabolic and anabolic reactions? Select the TWO answers that are correct.

Select the statements that correctly describe how a new DNA molecule reflects the original DNA molecule from which it was copied.Select the TWO answers that are correct.

How does the molecular structure of a water molecule affect its polarity?

What characteristics does a scientific hypothesis have? Select the TWO answers that are correct.

Process of Science

Chemistry of Life

Cell Structure and Function

Nutrition, Enzymes, Metabolism

Energy and Photosynthesis

Dietary Energy and Cellular Respiration

Genes to Proteins

DNA Structure and Replication

Cell Cycle and Cell Differentiation

Mutations and Cancer

Simple Inheritance and Meiosis

Complex Inheritance

Natural Selection and Adaptation

Nonadaptive Evolution and Speciation

Evidence for Evolution

Life on Earth

Prokaryotic Diversity

Eukaryotic Diversity

Human Evolution

Population Ecology

Community Ecology

Ecosystem Ecology

Sustainability

Plant Growth and Reproduction

Plant Physiology

Overview of Physiology

Digestive System

Cardiovascular System

Respiratory System

Central Nervous System

Reproductive System

Immune System

Filters