WGU C190 INTRO TO BIOLOGY FINAL EXAM AND PRE
ASSESSMENT EXAM 2024 ACTUAL EXAM COMPLETE
500 QUESTIONS WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS) /ALREADY GRADED A+
The attempt to disprove a hypothesis is accomplished by which of the following
tasks?
• conducting experiments
• making initial observations
• proposing a theory - ANSWER: conducting experiments
What is the main purpose of conducting experiments?
• proving a theory
• making initial observations
• disproving a hypothesis - ANSWER: disproving a hypothesis
A scientist observes that when she opens the back door of her house to let her cat
out, the songs of a certain species of bird abruptly change. She wants to follow up on
her observations with an informal experiment. Which of the following is the best
hypothesis for explaining the birds' song changes?
• The bird species switches from song to warning call whenever it sees a potential
predator.
• The bird species has a variety of songs that it sings, regardless o what is happening
in its environment.
• The scientist is mistaken and the songs do not change. - ANSWER: The bird species
switches from song to warning call whenever it sees a potential predator.
A scientist wants to test the hypothesis that a certain bird species in her back yard
changes its songs to warning calls whenever it detects the presence of a potential
predator. Which of the following most likely describes her initial observations?
• The scientist noticed that whenever she opened a door to her house, she heard
birds beginning to sing.
• Each time the scientist let her cat outside, the birds abruptly changed their songs.
• The scientist noticed that the birds only appeared at certain times of the day,
always singing the same song during those times. - ANSWER: Each time the scientist
let her cat outside, the birds abruptly changed their songs.
Which of the following lists correctly presents levels of organization from simplest to
most complex?
• organs, organ systems, organelles, organisms
,• biosphere, atoms, communities, organisms
• molecules, cells, populations, ecosystems - ANSWER: molecules, cells, populations,
ecosystems
A scientist believes that she has found a new life form. Which of the following
conditions is NOT considered essential in determining whether the putative new life
form is alive?
• The creature possesses purposeful anatomical structures that differ from one
another.
• The creature's body is bilaterally symmetrical.
• The creature seems to react to being touched. - ANSWER: The creature's body is
bilaterally symmetrical.
A scientist wishes to test a new antibiotic's ability to treat stubborn bacterial
infections. He tests his hypothesis that the antibiotic works better than existing
treatments by giving bacterial infections to mice and treating them with the
antibiotic. He then determines how many of the mice recover from their infections.
What is missing from his experimental design?
• He is missing a control group of mice that received a half dose of the new
antibiotic.
• He is missing a control group of mice that did not receive the new antibiotic.
• Nothing is missing. He has done everything he needs to do for this to be a
successful experiment. - ANSWER: He is missing a control group of mice that did not
receive the new antibiotic.
Why are theories stronger and more reliable than hypotheses?
• we believe in them more
• they have a control group
• they are based on many experimentally tested hypotheses - ANSWER: they are
based on many experimentally tested hypotheses
A scientist discovers a putative new life form and notes that the creature's body is
bilaterally symmetrical and consequently satisfies the criteria for defining life in
which of the following categories?
• order
• growth and development
• none, symmetry is not a basic characteristic of life - ANSWER: none, symmetry is
not a basic characteristic of life
An "educated guess" as to what causes an observed phenomenon is known as a:
• theory
• hypothesis
, • control - ANSWER: hypothesis
Which of the following statements correctly identifies and describes the type of
covalent bond found between oxygen and hydrogen in water molecules?
• polar covalent bonds, because hydrogen is more electronegative than oxygen
• hydrogen bonds, because hydrogen is more electronegative than oxygen
• polar covalent bonds, because oxygen is more electronegative than hydrogen -
ANSWER: polar covalent bonds, because oxygen is more electronegative than
hydrogen
Which of the following is NOT a component of a nucleotide?
• nitrogenous base
• fatty acid
• sugar - ANSWER: fatty acid
Which of the following elements is NOT particularly associated with living things?
• nitrogen
• silicon
• oxygen - ANSWER: silicon
Water molecules have one oxygen atom that is more electronegative than the two
hydrogen atoms bound to it. As a result, which type of bonding holds water
molecules together?
• non-polar covalent bonding
• polar covalent bonding
• ionic bonding - ANSWER: polar covalent bonding
The "backbones" of the macromolecules of life made of what element?
• carbon
• nitrogen
• oxygen - ANSWER: carbon
A biologist isolates a large, unidentified molecule from some cells in his lab. He
determines that the macromolecule breaks into smaller pieces with the concomitant
loss of water. What reaction has he observed?
• hydrolysis
• condensation
• dehydration - ANSWER: dehydration
Which of the following macromolecules are made from amino acids?
ASSESSMENT EXAM 2024 ACTUAL EXAM COMPLETE
500 QUESTIONS WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS) /ALREADY GRADED A+
The attempt to disprove a hypothesis is accomplished by which of the following
tasks?
• conducting experiments
• making initial observations
• proposing a theory - ANSWER: conducting experiments
What is the main purpose of conducting experiments?
• proving a theory
• making initial observations
• disproving a hypothesis - ANSWER: disproving a hypothesis
A scientist observes that when she opens the back door of her house to let her cat
out, the songs of a certain species of bird abruptly change. She wants to follow up on
her observations with an informal experiment. Which of the following is the best
hypothesis for explaining the birds' song changes?
• The bird species switches from song to warning call whenever it sees a potential
predator.
• The bird species has a variety of songs that it sings, regardless o what is happening
in its environment.
• The scientist is mistaken and the songs do not change. - ANSWER: The bird species
switches from song to warning call whenever it sees a potential predator.
A scientist wants to test the hypothesis that a certain bird species in her back yard
changes its songs to warning calls whenever it detects the presence of a potential
predator. Which of the following most likely describes her initial observations?
• The scientist noticed that whenever she opened a door to her house, she heard
birds beginning to sing.
• Each time the scientist let her cat outside, the birds abruptly changed their songs.
• The scientist noticed that the birds only appeared at certain times of the day,
always singing the same song during those times. - ANSWER: Each time the scientist
let her cat outside, the birds abruptly changed their songs.
Which of the following lists correctly presents levels of organization from simplest to
most complex?
• organs, organ systems, organelles, organisms
,• biosphere, atoms, communities, organisms
• molecules, cells, populations, ecosystems - ANSWER: molecules, cells, populations,
ecosystems
A scientist believes that she has found a new life form. Which of the following
conditions is NOT considered essential in determining whether the putative new life
form is alive?
• The creature possesses purposeful anatomical structures that differ from one
another.
• The creature's body is bilaterally symmetrical.
• The creature seems to react to being touched. - ANSWER: The creature's body is
bilaterally symmetrical.
A scientist wishes to test a new antibiotic's ability to treat stubborn bacterial
infections. He tests his hypothesis that the antibiotic works better than existing
treatments by giving bacterial infections to mice and treating them with the
antibiotic. He then determines how many of the mice recover from their infections.
What is missing from his experimental design?
• He is missing a control group of mice that received a half dose of the new
antibiotic.
• He is missing a control group of mice that did not receive the new antibiotic.
• Nothing is missing. He has done everything he needs to do for this to be a
successful experiment. - ANSWER: He is missing a control group of mice that did not
receive the new antibiotic.
Why are theories stronger and more reliable than hypotheses?
• we believe in them more
• they have a control group
• they are based on many experimentally tested hypotheses - ANSWER: they are
based on many experimentally tested hypotheses
A scientist discovers a putative new life form and notes that the creature's body is
bilaterally symmetrical and consequently satisfies the criteria for defining life in
which of the following categories?
• order
• growth and development
• none, symmetry is not a basic characteristic of life - ANSWER: none, symmetry is
not a basic characteristic of life
An "educated guess" as to what causes an observed phenomenon is known as a:
• theory
• hypothesis
, • control - ANSWER: hypothesis
Which of the following statements correctly identifies and describes the type of
covalent bond found between oxygen and hydrogen in water molecules?
• polar covalent bonds, because hydrogen is more electronegative than oxygen
• hydrogen bonds, because hydrogen is more electronegative than oxygen
• polar covalent bonds, because oxygen is more electronegative than hydrogen -
ANSWER: polar covalent bonds, because oxygen is more electronegative than
hydrogen
Which of the following is NOT a component of a nucleotide?
• nitrogenous base
• fatty acid
• sugar - ANSWER: fatty acid
Which of the following elements is NOT particularly associated with living things?
• nitrogen
• silicon
• oxygen - ANSWER: silicon
Water molecules have one oxygen atom that is more electronegative than the two
hydrogen atoms bound to it. As a result, which type of bonding holds water
molecules together?
• non-polar covalent bonding
• polar covalent bonding
• ionic bonding - ANSWER: polar covalent bonding
The "backbones" of the macromolecules of life made of what element?
• carbon
• nitrogen
• oxygen - ANSWER: carbon
A biologist isolates a large, unidentified molecule from some cells in his lab. He
determines that the macromolecule breaks into smaller pieces with the concomitant
loss of water. What reaction has he observed?
• hydrolysis
• condensation
• dehydration - ANSWER: dehydration
Which of the following macromolecules are made from amino acids?
