Ecu Biology 1050 Final Exam Questions and Correct Answers
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Course
BIO 1050
Institution
BIO 1050
________ is the study of living things. Biology
Biological literacy is the ability to: use the process of scientific inquiry to think creatively about real-world issues that have a biological component.
The basic raw materials of science are: observations
"Engaging in aerobic activity three time...
Ecu Biology 1050 Final Exam Questions
and Correct Answers
________ is the study of living things. ✅Biology
Biological literacy is the ability to: ✅use the process of scientific inquiry to think
creatively about real-world issues that have a biological component.
The basic raw materials of science are: ✅observations
"Engaging in aerobic activity three times each week will reduce cholesterol levels" is a:
✅testable hypothesis.
After one conducts a critical experiment, what is the next step in the scientific process?
✅Draw conclusions, and make revisions.
A hypothetical study examined the possible link between thimerosal (a preservative in
some MMR vaccines) and an increased risk of developing autism. This study had a
group of 1000 children. Half (500) of the children were randomly selected to receive a
MMR vaccine that included thimerosal and the other half (500) of the children were
randomly selected to receive a MMR vaccine that did not include the preservative
thimerosal. All 1000 children were monitored until the age of 6 and investigators
recorded the number of children who developed autism. What is the independent
variable in this experiment? ✅The presence/absence of thimerosal in the MMR
vaccine
A hypothetical study examined the possible link between thimerosal (a preservative in
some MMR vaccines) and an increased risk of developing autism. This study had a
group of 1000 children. Half (500) of the children were randomly selected to receive a
MMR vaccine that included thimerosal and the other half (500) of the children were
randomly selected to receive a MMR vaccine that did not include the preservative
thimerosal. All 1000 children were monitored until the age of 6 and investigators
recorded the number of children who developed autism.
They discovered that the same number of children developed autism in the group that
received the vaccine without thimerosal as in the group that received the vaccine with
thimerosal. What is the next step after receiving these results? ✅You have rejected the
hypothesis that thimerosal causes autism; new hypotheses should be developed and
tested to explain the cause of autism.
If your hypothesis is "Estrogens in sewage runoff turn fish into hermaphrodites," what is
your null hypothesis? ✅Estrogens in sewage runoff have no effect in turning fish into
hermaphrodites.
, You are given a pill in a scientific trial that looks identical to a pill containing an active
ingredient, but your pill does not contain an active ingredient. The pill you were given is
called a(n): ✅placebo.
In a randomized, controlled, double-blind study: ✅neither the experimenter nor the
subject know whether the subject is in a control group or an experimental group.
Which type of visual display would you use to illustrate the growth of a bacterial
population over a period of 100 hours? ✅line graph
The four most abundant elements in living organisms are: ✅hydrogen, nitrogen,
oxygen, and carbon.
An atom of iron has the atomic number 26. This means that it has: ✅26 protons.
Suppose you have an atom composed of 13 protons, 14 neutrons, and 13 electrons.
What is the approximate mass of this atom? ✅27
In an uncharged atom, the number of protons and ___________ must be equal.
✅electrons
A covalent bond is formed when: ✅two atoms share electrons.
Hydrogen bonds are: ✅the interaction between a hydrogen atom covalently bonded to
an electronegative atom and another electronegative atom.
How many total electrons are involved in a double bond, such as that found in a
molecule of oxygen (O2)? ✅4
Three principal types of bonds hold multiple atoms together. These are: ✅covalent
bonds, ionic bonds, and hydrogen bonds.
One important difference between covalent and ionic bonds is that: ✅in covalent
bonds, two atoms share electrons, whereas in ionic bonds, one atom gives one or more
electrons to the other atom.
When two hydrogen atoms share electrons, what is the result? ✅A stable H2 molecule
is formed.
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