C190 Introduction to Biology WGU Unit 1 Modules 1, 2 &
3 Latest Update 2026 | Exam Prep | 100% Accurate
Answers
1. Describe the role of the independent variable in a scientific experiment.
The independent variable is the variable that is not manipulated.
The independent variable is the outcome that is measured in the
experiment.
The independent variable is the factor that is intentionally changed
to observe its effect on the dependent variable.
The independent variable is the factor that remains constant
throughout the experiment.
2. Describe the significance of matter in biological systems.
Matter is only important for non-living systems.
Matter is essential for the structure and function of living organisms,
as it makes up cells and macromolecules.
Matter is irrelevant to biological processes.
Matter is solely composed of energy.
3. Describe the role of controlled variables in scientific experiments.
Controlled variables help to isolate the effects of the independent
variable on the dependent variable, ensuring valid results.
Controlled variables are the same as dependent variables and are
measured for results.
Controlled variables are the main focus of the experiment and are
manipulated to test hypotheses.
, Controlled variables are irrelevant and do not affect the outcome of
the experiment.
4. The molecular shape of a molecule determines its?
Location
Function
Effectiveness
5. What is the definition of a biological community?
The physical environment where organisms live.
A single species living in a specific area.
A group of interacting populations of different species.
All living organisms in an ecosystem.
6. Describe how the characteristics of living organisms differentiate them from
inanimate objects.
Living organisms are defined by their ability to form ecosystems.
Living organisms exhibit growth, reproduction, and responsiveness
to their environment, which inanimate objects do not.
Living organisms are composed solely of macromolecules.
Living organisms can exist without energy input.
7. The definition of nutrients is
portions and select ingredients
materials used to manufacture a finished feed
, quantitative distribution of the individual nutrients within the finished
formula
a nourishing substance, food, or component of food, including
minerals, vitamins, fats, protein, carbohydrates, and water
8. The normal body pH is between:
7.55 and 7.65.
7.25 and 7.35.
7.45 and 7.55.
7.35 and 7.45.
9. The definition of a living organism includes:
Being able to consume and transform energy
Being able to reproduce
Capable of adapting to the environment and changing over time
All of the above
10. The 2 basic types of cells that exist are the
prokaryotes and eukaryotes
monera and protista
monera and prokaryotes
11. An organelle is:
B. A membrane-enclosed structure within the cell
A. A macromolecule, such as a chromosome or ribosome, within the
cell
, C. A & B
12. Describe how energy is related to biological processes.
Energy is irrelevant to the functioning of cells.
Energy is only important for physical movement in organisms.
Energy is essential for biological processes as it powers cellular
activities and metabolic reactions.
Energy is solely derived from sunlight in all organisms.
13. Describe the role of dependent variables in an experimental setup.
Dependent variables are constants that remain unchanged
throughout the experiment.
Dependent variables are the factors that are manipulated by the
scientist.
Dependent variables are unrelated factors that may influence the
results.
Dependent variables are the outcomes that are measured to assess
the effect of the independent variable.
14. What is the scientific definition of energy?
The total number of cells in an organism.
The capacity to do work or produce change.
The measure of an object's mass.
The ability to maintain homeostasis.
15. Describe the role of genes in the context of biological inheritance.
3 Latest Update 2026 | Exam Prep | 100% Accurate
Answers
1. Describe the role of the independent variable in a scientific experiment.
The independent variable is the variable that is not manipulated.
The independent variable is the outcome that is measured in the
experiment.
The independent variable is the factor that is intentionally changed
to observe its effect on the dependent variable.
The independent variable is the factor that remains constant
throughout the experiment.
2. Describe the significance of matter in biological systems.
Matter is only important for non-living systems.
Matter is essential for the structure and function of living organisms,
as it makes up cells and macromolecules.
Matter is irrelevant to biological processes.
Matter is solely composed of energy.
3. Describe the role of controlled variables in scientific experiments.
Controlled variables help to isolate the effects of the independent
variable on the dependent variable, ensuring valid results.
Controlled variables are the same as dependent variables and are
measured for results.
Controlled variables are the main focus of the experiment and are
manipulated to test hypotheses.
, Controlled variables are irrelevant and do not affect the outcome of
the experiment.
4. The molecular shape of a molecule determines its?
Location
Function
Effectiveness
5. What is the definition of a biological community?
The physical environment where organisms live.
A single species living in a specific area.
A group of interacting populations of different species.
All living organisms in an ecosystem.
6. Describe how the characteristics of living organisms differentiate them from
inanimate objects.
Living organisms are defined by their ability to form ecosystems.
Living organisms exhibit growth, reproduction, and responsiveness
to their environment, which inanimate objects do not.
Living organisms are composed solely of macromolecules.
Living organisms can exist without energy input.
7. The definition of nutrients is
portions and select ingredients
materials used to manufacture a finished feed
, quantitative distribution of the individual nutrients within the finished
formula
a nourishing substance, food, or component of food, including
minerals, vitamins, fats, protein, carbohydrates, and water
8. The normal body pH is between:
7.55 and 7.65.
7.25 and 7.35.
7.45 and 7.55.
7.35 and 7.45.
9. The definition of a living organism includes:
Being able to consume and transform energy
Being able to reproduce
Capable of adapting to the environment and changing over time
All of the above
10. The 2 basic types of cells that exist are the
prokaryotes and eukaryotes
monera and protista
monera and prokaryotes
11. An organelle is:
B. A membrane-enclosed structure within the cell
A. A macromolecule, such as a chromosome or ribosome, within the
cell
, C. A & B
12. Describe how energy is related to biological processes.
Energy is irrelevant to the functioning of cells.
Energy is only important for physical movement in organisms.
Energy is essential for biological processes as it powers cellular
activities and metabolic reactions.
Energy is solely derived from sunlight in all organisms.
13. Describe the role of dependent variables in an experimental setup.
Dependent variables are constants that remain unchanged
throughout the experiment.
Dependent variables are the factors that are manipulated by the
scientist.
Dependent variables are unrelated factors that may influence the
results.
Dependent variables are the outcomes that are measured to assess
the effect of the independent variable.
14. What is the scientific definition of energy?
The total number of cells in an organism.
The capacity to do work or produce change.
The measure of an object's mass.
The ability to maintain homeostasis.
15. Describe the role of genes in the context of biological inheritance.
