WGU C190 INTRO TO BIOLOGY
OA AND PA 2025/2026 BANK
CURRENTLY TESTING
QUESTIONS WITH DETAILED
VERIFIED ANSWERS /EXPERT
VERIFIED FOR A+ GUARANTEED
/BRAND NEW!!
What item would be classified as Biotic? - ANSWER Fungus
What Item is an atom? - ANSWER Nitrogen
Largemouth bass have recently been introduced into ponds that
previously did not contain any large, predatory fish. Which adaptation
would help the existing population of small, prey species of fish avoid
predation from the largemouth bass? - ANSWER Faster average swim
speed
If global climate change continues (as predicted) to increase the average
temperature of habitats around the world, how would populations of
spadefoot toads likely evolve in response to an increase in pond
temperatures? - ANSWER Spadefoot toads would likely evolve to have a
higher percentage of toads become carnivorous.
Male peacocks compete with one another to mate female peacocks.
Males with more colorful tail feathers attract female mates at a higher rate
than those without. Therefore, male peacocks have colorful tail feathers,
whereas female peacocks do not. What is this an example of? - ANSWER
Sexual selection
A gardener maintains a species of rose that produce either yellow flowers
(the dominant phenotype) or white flowers (the recessive phenotype).
One day, the gardener observes that a cross between two yellow rose
bushes has led to a single rose bush with orange flowers. What
,evolutionary mechanism is involved in the change in the gene pool of this
species? - ANSWER Mutation
After a rainy day, a leaf has small droplets of water on its surface. Which
property of water is this an example of? - ANSWER Cohesion
A plastic water bottle is filled with water and placed in the freezer. The
next day the frozen water has expanded, causing the plastic bottle to
rupture. Which characteristic of water is this an example of? - ANSWER
Density
A biological polymer consists of 358 amino acids linked together
covalently. What is this polymer? - ANSWER A protein
A molecule consists of a chain of glucose monomers linked together.
What is the function of this molecule within the cell? - ANSWER To
store energy
Which substance is found in ATP? - ANSWER nitrogenous base
During the Calvin cycle, a sugar molecule is formed as ATP is converted
into ADP and a free phosphate group. What is happening to energy in this
second step of photosynthesis? - ANSWER Energy is being released from
ATP to power the conversion of a sugar molecule.
Which of these is an output of the light-dependent reaction of
photosynthesis? - ANSWER ATP
Which molecule is an input to the Calvin-Benson cycle? - ANSWER
Carbon dioxide
Which stage of cellular respiration releases carbon dioxide as a product?
- ANSWER Krebs cycle
Which stage of cellular respiration releases the most energy and,
therefore, produces the most ATP molecules? - ANSWER Electron
transport chain
In the human body, muscle fibers metabolize sugars to produce energy.
Fast-twitch muscle fibers, like those used during short-term, vigorous
exercise, carry out an anaerobic process that produces less energy per
sugar molecule processed. Which metabolic process do fast-twitch
muscle fibers carry out? - ANSWER Fermentation
,Fermentation uses sugar in the absence of which molecule? - ANSWER
O2
What is the function of the flagellum? - ANSWER Locomotion and
sensing
What is true of a eukaryotic cell? - ANSWER It contains a
mitochondrion.
Choose the two substances that are the main components in most
eukaryotic cell membranes. - ANSWER Lipids and proteins
Some cells need to maintain a set concentration of Na+ and K+ ions.
These cells are able to do this with the help of the Na/K pump, which
transports these ions from areas of low concentration to areas of high
concentration (against their concentration gradient). Na+ is pumped out,
and K+ is pumped in. Which type of membrane transport is involved in
this action? - ANSWER Active transport
Which two characteristics are found in organism C? - ANSWER Jaw and
Lungs
Where is the ancestor of wolves and gorillas, but not frogs, depicted on
this cladogram? - ANSWER Point E
Which organism has neither bones nor a jaw? - ANSWER Lamprey
Which two organisms have eggs with shells? - ANSWER Crocodilians
and Amphibians
Which organisms have four limbs and produce amniotic eggs without
shells? - ANSWER Primates and Rodents and Rabbits
Which species on the following cladogram has the most similar DNA
sequence to species E? - ANSWER D
A subatomic particle has a negative charge and is found in a shell of the
atom. What is this particle? - ANSWER An electron
What is the charge of a proton? - ANSWER +1 (positive)
, A molecular bond results from an electron being transferred from one
atom to another. Which type of bond holds these atoms together? -
ANSWER Ionic
Which situation describes covalent bonding? - ANSWER An atom
shares an electron with another atom.
Chromosomes are structures that contain hereditary material that will be
passed from one generation to the next. According to this information,
which organic molecule must be present in chromosomes? - ANSWER
DNA
A cell has divided its chromosomes into two new nuclei. The
cytoskeleton of the cell is currently pinching the cell in the middle to
form two new cells. In which stage of the cell cycle is this cell? -
ANSWER Cytokinesis
What is the function of the histones during S phase? - ANSWER
Organizing and helping to unwind the DNA so the replication enzymes
can access it
How is DNA structured during the metaphase stage of mitosis? -
ANSWER The centromere at the center keeps DNA lined up at the cell's
equator.
What is true regarding the transition from metaphase to anaphase during
mitosis? - ANSWER Sister chromatids are aligned along the center of the
cell and then pulled apart into separate chromatids.
Which stage of mitosis is depicted? - ANSWER prophase
Sister chromatids are being separated and moving towards opposite poles
of the cell. Which stage of mitosis is this? - ANSWER Anaphase
A cell undergoing meiosis is currently dividing. The two new daughter
cells will be haploid, but the DNA they contain is still replicated. The
homologous chromosomes have separated and are ready to start the
second division, but they have not yet begun the second round of division.
Which stage of the cell cycle is this cell in? - ANSWER Telophase I
Homologous pairs of chromosomes have separated into two cells. Sister
chromatids in each cell have not yet lined up in the middle of the cell.
Which stage of the cell cycle is this? - ANSWER Prophase II
OA AND PA 2025/2026 BANK
CURRENTLY TESTING
QUESTIONS WITH DETAILED
VERIFIED ANSWERS /EXPERT
VERIFIED FOR A+ GUARANTEED
/BRAND NEW!!
What item would be classified as Biotic? - ANSWER Fungus
What Item is an atom? - ANSWER Nitrogen
Largemouth bass have recently been introduced into ponds that
previously did not contain any large, predatory fish. Which adaptation
would help the existing population of small, prey species of fish avoid
predation from the largemouth bass? - ANSWER Faster average swim
speed
If global climate change continues (as predicted) to increase the average
temperature of habitats around the world, how would populations of
spadefoot toads likely evolve in response to an increase in pond
temperatures? - ANSWER Spadefoot toads would likely evolve to have a
higher percentage of toads become carnivorous.
Male peacocks compete with one another to mate female peacocks.
Males with more colorful tail feathers attract female mates at a higher rate
than those without. Therefore, male peacocks have colorful tail feathers,
whereas female peacocks do not. What is this an example of? - ANSWER
Sexual selection
A gardener maintains a species of rose that produce either yellow flowers
(the dominant phenotype) or white flowers (the recessive phenotype).
One day, the gardener observes that a cross between two yellow rose
bushes has led to a single rose bush with orange flowers. What
,evolutionary mechanism is involved in the change in the gene pool of this
species? - ANSWER Mutation
After a rainy day, a leaf has small droplets of water on its surface. Which
property of water is this an example of? - ANSWER Cohesion
A plastic water bottle is filled with water and placed in the freezer. The
next day the frozen water has expanded, causing the plastic bottle to
rupture. Which characteristic of water is this an example of? - ANSWER
Density
A biological polymer consists of 358 amino acids linked together
covalently. What is this polymer? - ANSWER A protein
A molecule consists of a chain of glucose monomers linked together.
What is the function of this molecule within the cell? - ANSWER To
store energy
Which substance is found in ATP? - ANSWER nitrogenous base
During the Calvin cycle, a sugar molecule is formed as ATP is converted
into ADP and a free phosphate group. What is happening to energy in this
second step of photosynthesis? - ANSWER Energy is being released from
ATP to power the conversion of a sugar molecule.
Which of these is an output of the light-dependent reaction of
photosynthesis? - ANSWER ATP
Which molecule is an input to the Calvin-Benson cycle? - ANSWER
Carbon dioxide
Which stage of cellular respiration releases carbon dioxide as a product?
- ANSWER Krebs cycle
Which stage of cellular respiration releases the most energy and,
therefore, produces the most ATP molecules? - ANSWER Electron
transport chain
In the human body, muscle fibers metabolize sugars to produce energy.
Fast-twitch muscle fibers, like those used during short-term, vigorous
exercise, carry out an anaerobic process that produces less energy per
sugar molecule processed. Which metabolic process do fast-twitch
muscle fibers carry out? - ANSWER Fermentation
,Fermentation uses sugar in the absence of which molecule? - ANSWER
O2
What is the function of the flagellum? - ANSWER Locomotion and
sensing
What is true of a eukaryotic cell? - ANSWER It contains a
mitochondrion.
Choose the two substances that are the main components in most
eukaryotic cell membranes. - ANSWER Lipids and proteins
Some cells need to maintain a set concentration of Na+ and K+ ions.
These cells are able to do this with the help of the Na/K pump, which
transports these ions from areas of low concentration to areas of high
concentration (against their concentration gradient). Na+ is pumped out,
and K+ is pumped in. Which type of membrane transport is involved in
this action? - ANSWER Active transport
Which two characteristics are found in organism C? - ANSWER Jaw and
Lungs
Where is the ancestor of wolves and gorillas, but not frogs, depicted on
this cladogram? - ANSWER Point E
Which organism has neither bones nor a jaw? - ANSWER Lamprey
Which two organisms have eggs with shells? - ANSWER Crocodilians
and Amphibians
Which organisms have four limbs and produce amniotic eggs without
shells? - ANSWER Primates and Rodents and Rabbits
Which species on the following cladogram has the most similar DNA
sequence to species E? - ANSWER D
A subatomic particle has a negative charge and is found in a shell of the
atom. What is this particle? - ANSWER An electron
What is the charge of a proton? - ANSWER +1 (positive)
, A molecular bond results from an electron being transferred from one
atom to another. Which type of bond holds these atoms together? -
ANSWER Ionic
Which situation describes covalent bonding? - ANSWER An atom
shares an electron with another atom.
Chromosomes are structures that contain hereditary material that will be
passed from one generation to the next. According to this information,
which organic molecule must be present in chromosomes? - ANSWER
DNA
A cell has divided its chromosomes into two new nuclei. The
cytoskeleton of the cell is currently pinching the cell in the middle to
form two new cells. In which stage of the cell cycle is this cell? -
ANSWER Cytokinesis
What is the function of the histones during S phase? - ANSWER
Organizing and helping to unwind the DNA so the replication enzymes
can access it
How is DNA structured during the metaphase stage of mitosis? -
ANSWER The centromere at the center keeps DNA lined up at the cell's
equator.
What is true regarding the transition from metaphase to anaphase during
mitosis? - ANSWER Sister chromatids are aligned along the center of the
cell and then pulled apart into separate chromatids.
Which stage of mitosis is depicted? - ANSWER prophase
Sister chromatids are being separated and moving towards opposite poles
of the cell. Which stage of mitosis is this? - ANSWER Anaphase
A cell undergoing meiosis is currently dividing. The two new daughter
cells will be haploid, but the DNA they contain is still replicated. The
homologous chromosomes have separated and are ready to start the
second division, but they have not yet begun the second round of division.
Which stage of the cell cycle is this cell in? - ANSWER Telophase I
Homologous pairs of chromosomes have separated into two cells. Sister
chromatids in each cell have not yet lined up in the middle of the cell.
Which stage of the cell cycle is this? - ANSWER Prophase II
