BIL 150 Final Review Questions with Correct Answers
Question 1:
Which of the following types of cells utilize deoxyribonucleic acid (DNA) as their genetic
material but do not have their DNA encased within a nuclear envelope?
animal fungi archaean plant
Answer:
c) archaen
Question 2:
Which of the following statements is FALSE regarding the complexity of biological systems? An
ecosystem displays complex properties not present in the individual communities within it.
Understanding the chemical structure of DNA reveals how it directs the functioning of a living
cell.
An understanding of the interactions between different components within a living system is a
key goal of a systems biology approach to understanding biological complexity.
Knowing the function of a component of a living system can provide insight into its structure
and organization.
Answer:
b) Understanding the chemical structure of DNA reveals how it directs the functioning of a
living cell. Charles Darwin proposed a mechanism for descent with modification that stated that
organisms of a particular species are adapted to their environment when they possess .
heritable traits that enhance their survival and reproductive success in the local environment
non-heritable traits that enhance their survival in the local environment
non-heritable traits that enhance their survival and reproductive success in the local
environment heritable traits that decrease their survival and reproductive success in the local
environment
Question 3:
Question
Answer:
a) heritable traits that enhance their survival and reproductive success in the local environment
Question 4:
A researcher discovered a species of moth that lays its eggs on oak trees. Eggs are laid at two
distinct times of the year: early in spring when the oak trees are flowering and in midsummer
when flowering is past. Caterpillars from eggs that hatch in spring feed on oak flowers and look
like oak flowers. But caterpillars that hatch in summer feed on oak leaves and look like oak
,twigs.How does the same population of moths produce such different-looking caterpillars on
the same trees? To answer this question, the biologist caught many female moths from the
same population and collected their eggs. He put at least one egg from each female into eight
identical cups. The eggs hatched, and at least two
larvae from each female were maintained in one of the four temperature and light conditions
listed below.In each of the four environments, one of the caterpillars was fed oak flowers, the
other oak leaves. Thus, there were a
Answer:
d) Differences in diet trigger the development of different types of caterpillars.larvae from each
female were maintained in one of the four temperature and light conditions listed below.In
each of the four environments, one of the caterpillars was fed oak flowers, the other oak
leaves. Thus, there were a
d) Differences in diet trigger the development of different types of caterpillars.
larvae from each female were maintained in one of the four temperature and light conditions
listed below.In each of the four environments, one of the caterpillars was fed oak flowers, the
other oak leaves. Thus, there were a
d) Differences in diet trigger the development of different types of caterpillars.
larvae from each female were maintained in one of the four temperature and light conditions
listed below.In each of the four environments, one of the caterpillars was fed oak flowers, the
other oak leaves. Thus, there were a
d) Differences in diet trigger the development of different types of caterpillars.
Question 5:
Recall that eggs from the same female were exposed to each of the eight treatments used. This
aspect of the experimental design tested which of the following hypotheses?
The differences are genetic. A female will either produce all flowerlike caterpillars or all
twig-like caterpillars.
The longer day lengths of summer trigger the development of twig-like caterpillars. Differences
in diet trigger the development of different types of caterpillars.
Differences in air pressure, due to elevation, trigger the development of different types of
caterpillars.
Answer:
a) The differences are genetic. A female will either produce all flowerlike caterpillars or all
twig-like caterpillars.
Question 6:
Agrobacterium infects plants and causes them to form tumors. You determine that tumor
formation requires a large amount of the plant's energy for tissue formation. How might this
change the number of offspring a plant produces, and what is the most likely explanation for
this change?
The number of offspring should decrease, because the plant will divert energy from
reproduction to tumor formation.
,The number of offspring should increase, because the bacteria will provide energy for the plant.
The number of offspring should increase, because in general, illness increases the reproductive
output of organisms.
There should be no effect of infection on offspring production because energy for reproduction
is independent of infection.
Answer:
a) The number of offspring should decrease, because the plant will divert energy from
reproduction to tumor formation.
Question 7:
Why is a scientific topic best discussed by people of varying points of view, from different
subdisciplines, and representing diverse cultures?
This is a way of ensuring that everyone gets the same results.
Scientists can coordinate with others to conduct experiments in similar ways. Robust and
critical discussion between diverse groups improves scientific thinking.
People need to exchange their ideas with other disciplines and cultures because everyone has a
right to an opinion in science.
Answer:
c) Robust and critical discussion between diverse groups improves scientific thinking. A covalent
bond is likely to be polar when .
c) Robust and critical discussion between diverse groups improves scientific thinking. A covalent
bond is likely to be polar when .
c) Robust and critical discussion between diverse groups improves scientific thinking. A covalent
bond is likely to be polar when .
c) Robust and critical discussion between diverse groups improves scientific thinking. A covalent
bond is likely to be polar when .
Question 8:
the two atoms sharing electrons are the same elements
one of the atoms sharing electrons is more electronegative than the other atom carbon is one
of the two atoms sharing electrons
the two atoms sharing electrons are equally electronegative
Answer:
b) one of the atoms sharing electrons is more electronegative than the other atom
Question 9:
Which of the following correctly describes all chemical equilibrium?
There are equal concentrations of products and reactants while forward and reverse reactions
continue.
, Concentrations of products are higher than the concentrations of the reactants.
There are equal concentrations of reactants and products, and the reactions have stopped.
Forward and reverse reactions continue with no net effect on the concentrations of the
reactants and products.
Answer:
d) Forward and reverse reactions continue with no net effect on the concentrations of the
reactants and products.
Question 10:
Consider the following reaction at equilibrium: CO2 + H2O ↔ H2CO3. What would be the
effect of adding additional H2CO3?
It would drive the equilibrium dynamics to the right. The amounts of CO2 and H2O would
decrease.
It would drive the equilibrium dynamics to the left.
Nothing would happen, because the reactants and products are in equilibrium.
Answer:
c) It would drive the equilibrium dynamics to the left.
Question 11:
If the pH of a solution is decreased from 9 to 8, it means that the concentration of . H+ has
increased tenfold (10x) compared to what it was at pH 9
H+ has doubled compared to what it was at pH 9
OH- has increased tenfold (10x) compared to what it was at pH 9 H+ has decreased to
one-tenth (1/10) what it was at pH 9
Answer:
a) H+ has increased tenfold (10x) compared to what it was at pH 9One of the buffers that
contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is a weak acid
that, when placed in an aqueous solution, dissociates into a bicarbonate ion (HCO3-) and a
hydrogen ion (H+), as noted below.H2CO3 ↔ HCO3- + H+a) H+ has increased tenfold (10x)
compared to what it was at pH 9One of the buffers that contribute to pH stability in human
blood is carbonic acid (H2CO3). Carbonic acid is a weak acid that, when placed in an aqueous
solution, dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+), as noted
below.H2CO3 ↔ HCO3- + H+
a) H+ has increased tenfold (10x) compared to what it was at pH 9
One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3).
Carbonic acid is a weak acid that, when placed in an aqueous solution, dissociates into a
bicarbonate ion (HCO3-) and a hydrogen ion (H+), as noted below.
H2CO3 ↔ HCO3- + H+
a) H+ has increased tenfold (10x) compared to what it was at pH 9
One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3).
Carbonic acid is a weak acid that, when placed in an aqueous solution, dissociates into a
Question 1:
Which of the following types of cells utilize deoxyribonucleic acid (DNA) as their genetic
material but do not have their DNA encased within a nuclear envelope?
animal fungi archaean plant
Answer:
c) archaen
Question 2:
Which of the following statements is FALSE regarding the complexity of biological systems? An
ecosystem displays complex properties not present in the individual communities within it.
Understanding the chemical structure of DNA reveals how it directs the functioning of a living
cell.
An understanding of the interactions between different components within a living system is a
key goal of a systems biology approach to understanding biological complexity.
Knowing the function of a component of a living system can provide insight into its structure
and organization.
Answer:
b) Understanding the chemical structure of DNA reveals how it directs the functioning of a
living cell. Charles Darwin proposed a mechanism for descent with modification that stated that
organisms of a particular species are adapted to their environment when they possess .
heritable traits that enhance their survival and reproductive success in the local environment
non-heritable traits that enhance their survival in the local environment
non-heritable traits that enhance their survival and reproductive success in the local
environment heritable traits that decrease their survival and reproductive success in the local
environment
Question 3:
Question
Answer:
a) heritable traits that enhance their survival and reproductive success in the local environment
Question 4:
A researcher discovered a species of moth that lays its eggs on oak trees. Eggs are laid at two
distinct times of the year: early in spring when the oak trees are flowering and in midsummer
when flowering is past. Caterpillars from eggs that hatch in spring feed on oak flowers and look
like oak flowers. But caterpillars that hatch in summer feed on oak leaves and look like oak
,twigs.How does the same population of moths produce such different-looking caterpillars on
the same trees? To answer this question, the biologist caught many female moths from the
same population and collected their eggs. He put at least one egg from each female into eight
identical cups. The eggs hatched, and at least two
larvae from each female were maintained in one of the four temperature and light conditions
listed below.In each of the four environments, one of the caterpillars was fed oak flowers, the
other oak leaves. Thus, there were a
Answer:
d) Differences in diet trigger the development of different types of caterpillars.larvae from each
female were maintained in one of the four temperature and light conditions listed below.In
each of the four environments, one of the caterpillars was fed oak flowers, the other oak
leaves. Thus, there were a
d) Differences in diet trigger the development of different types of caterpillars.
larvae from each female were maintained in one of the four temperature and light conditions
listed below.In each of the four environments, one of the caterpillars was fed oak flowers, the
other oak leaves. Thus, there were a
d) Differences in diet trigger the development of different types of caterpillars.
larvae from each female were maintained in one of the four temperature and light conditions
listed below.In each of the four environments, one of the caterpillars was fed oak flowers, the
other oak leaves. Thus, there were a
d) Differences in diet trigger the development of different types of caterpillars.
Question 5:
Recall that eggs from the same female were exposed to each of the eight treatments used. This
aspect of the experimental design tested which of the following hypotheses?
The differences are genetic. A female will either produce all flowerlike caterpillars or all
twig-like caterpillars.
The longer day lengths of summer trigger the development of twig-like caterpillars. Differences
in diet trigger the development of different types of caterpillars.
Differences in air pressure, due to elevation, trigger the development of different types of
caterpillars.
Answer:
a) The differences are genetic. A female will either produce all flowerlike caterpillars or all
twig-like caterpillars.
Question 6:
Agrobacterium infects plants and causes them to form tumors. You determine that tumor
formation requires a large amount of the plant's energy for tissue formation. How might this
change the number of offspring a plant produces, and what is the most likely explanation for
this change?
The number of offspring should decrease, because the plant will divert energy from
reproduction to tumor formation.
,The number of offspring should increase, because the bacteria will provide energy for the plant.
The number of offspring should increase, because in general, illness increases the reproductive
output of organisms.
There should be no effect of infection on offspring production because energy for reproduction
is independent of infection.
Answer:
a) The number of offspring should decrease, because the plant will divert energy from
reproduction to tumor formation.
Question 7:
Why is a scientific topic best discussed by people of varying points of view, from different
subdisciplines, and representing diverse cultures?
This is a way of ensuring that everyone gets the same results.
Scientists can coordinate with others to conduct experiments in similar ways. Robust and
critical discussion between diverse groups improves scientific thinking.
People need to exchange their ideas with other disciplines and cultures because everyone has a
right to an opinion in science.
Answer:
c) Robust and critical discussion between diverse groups improves scientific thinking. A covalent
bond is likely to be polar when .
c) Robust and critical discussion between diverse groups improves scientific thinking. A covalent
bond is likely to be polar when .
c) Robust and critical discussion between diverse groups improves scientific thinking. A covalent
bond is likely to be polar when .
c) Robust and critical discussion between diverse groups improves scientific thinking. A covalent
bond is likely to be polar when .
Question 8:
the two atoms sharing electrons are the same elements
one of the atoms sharing electrons is more electronegative than the other atom carbon is one
of the two atoms sharing electrons
the two atoms sharing electrons are equally electronegative
Answer:
b) one of the atoms sharing electrons is more electronegative than the other atom
Question 9:
Which of the following correctly describes all chemical equilibrium?
There are equal concentrations of products and reactants while forward and reverse reactions
continue.
, Concentrations of products are higher than the concentrations of the reactants.
There are equal concentrations of reactants and products, and the reactions have stopped.
Forward and reverse reactions continue with no net effect on the concentrations of the
reactants and products.
Answer:
d) Forward and reverse reactions continue with no net effect on the concentrations of the
reactants and products.
Question 10:
Consider the following reaction at equilibrium: CO2 + H2O ↔ H2CO3. What would be the
effect of adding additional H2CO3?
It would drive the equilibrium dynamics to the right. The amounts of CO2 and H2O would
decrease.
It would drive the equilibrium dynamics to the left.
Nothing would happen, because the reactants and products are in equilibrium.
Answer:
c) It would drive the equilibrium dynamics to the left.
Question 11:
If the pH of a solution is decreased from 9 to 8, it means that the concentration of . H+ has
increased tenfold (10x) compared to what it was at pH 9
H+ has doubled compared to what it was at pH 9
OH- has increased tenfold (10x) compared to what it was at pH 9 H+ has decreased to
one-tenth (1/10) what it was at pH 9
Answer:
a) H+ has increased tenfold (10x) compared to what it was at pH 9One of the buffers that
contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is a weak acid
that, when placed in an aqueous solution, dissociates into a bicarbonate ion (HCO3-) and a
hydrogen ion (H+), as noted below.H2CO3 ↔ HCO3- + H+a) H+ has increased tenfold (10x)
compared to what it was at pH 9One of the buffers that contribute to pH stability in human
blood is carbonic acid (H2CO3). Carbonic acid is a weak acid that, when placed in an aqueous
solution, dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+), as noted
below.H2CO3 ↔ HCO3- + H+
a) H+ has increased tenfold (10x) compared to what it was at pH 9
One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3).
Carbonic acid is a weak acid that, when placed in an aqueous solution, dissociates into a
bicarbonate ion (HCO3-) and a hydrogen ion (H+), as noted below.
H2CO3 ↔ HCO3- + H+
a) H+ has increased tenfold (10x) compared to what it was at pH 9
One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3).
Carbonic acid is a weak acid that, when placed in an aqueous solution, dissociates into a
