LSUE Biology 1001 Midterm and Final
Exams – 150-Question Complete Practice
Exam
Section I: Scientific Method and Basic Biology (1–15)
1. What is the first step in the scientific method?
A. Form a hypothesis
B. Make an observation
C. Conduct an experiment
D. Draw a conclusion
Correct Answer: B
Rationale: The scientific method begins with observation, which leads to a question and
then a hypothesis.
2. What is a hypothesis?
A. A proven fact
B. A testable prediction
C. A conclusion
D. A theory
Correct Answer: B
Rationale: A hypothesis is a testable, falsifiable prediction based on observations.
3. What is a control group in an experiment?
A. The group that receives the treatment
B. The group that does not receive the treatment
C. The group that is observed only
D. The group that is not measured
Correct Answer: B
Rationale: The control group does not receive the experimental treatment and serves as a
baseline for comparison.
,4. What is an independent variable?
A. The variable that is measured
B. The variable that is manipulated
C. The variable that is controlled
D. The variable that is random
Correct Answer: B
Rationale: The independent variable is the factor that is manipulated by the researcher.
5. What is a dependent variable?
A. The variable that is measured
B. The variable that is manipulated
C. The variable that is controlled
D. The variable that is random
Correct Answer: A
Rationale: The dependent variable is the factor that is measured in response to the
independent variable.
6. What is a theory in science?
A. A guess
B. A well-supported explanation
C. A hypothesis
D. A law
Correct Answer: B
Rationale: A scientific theory is a well-supported explanation of a broad range of
phenomena.
7. What is a scientific law?
A. A guess
B. A description of a consistent pattern in nature
C. A hypothesis
D. A theory
, Correct Answer: B
Rationale: A scientific law describes a consistent pattern in nature, often mathematically.
8. What is the difference between a hypothesis and a theory?
A. A hypothesis is broader than a theory
B. A theory is broader and more supported than a hypothesis
C. They are the same
D. A theory is a guess
Correct Answer: B
Rationale: A theory is broader and more extensively supported than a hypothesis.
9. What is a controlled experiment?
A. An experiment with one variable
B. An experiment with multiple variables
C. An experiment without variables
D. An experiment without a control
Correct Answer: A
Rationale: A controlled experiment manipulates one independent variable while holding
others constant.
10. What is a placebo?
A. A treatment with active ingredients
B. A treatment with no active ingredients
C. A control group
D. A dependent variable
Correct Answer: B
Rationale: A placebo is an inactive treatment used in controlled studies.
11. What is a double-blind study?
A. Neither the researcher nor the participant knows the treatment
B. Only the researcher knows the treatment
, C. Only the participant knows the treatment
D. Both know the treatment
Correct Answer: A
Rationale: In a double-blind study, neither the researcher nor the participant knows who
receives the treatment.
12. What is biology?
A. The study of matter
B. The study of living organisms
C. The study of rocks
D. The study of stars
Correct Answer: B
Rationale: Biology is the scientific study of living organisms and their interactions.
13. What are the characteristics of living things?
A. Organization, metabolism, growth, reproduction, response to stimuli
B. Organization only
C. Metabolism only
D. Reproduction only
Correct Answer: A
Rationale: Living things share characteristics including organization, metabolism, growth,
reproduction, and response to stimuli.
14. What is homeostasis?
A. The maintenance of a stable internal environment
B. The disruption of internal balance
C. The growth of an organism
D. The reproduction of an organism
Correct Answer: A
Rationale: Homeostasis is the maintenance of a stable internal environment.
15. What is the biosphere?
Exams – 150-Question Complete Practice
Exam
Section I: Scientific Method and Basic Biology (1–15)
1. What is the first step in the scientific method?
A. Form a hypothesis
B. Make an observation
C. Conduct an experiment
D. Draw a conclusion
Correct Answer: B
Rationale: The scientific method begins with observation, which leads to a question and
then a hypothesis.
2. What is a hypothesis?
A. A proven fact
B. A testable prediction
C. A conclusion
D. A theory
Correct Answer: B
Rationale: A hypothesis is a testable, falsifiable prediction based on observations.
3. What is a control group in an experiment?
A. The group that receives the treatment
B. The group that does not receive the treatment
C. The group that is observed only
D. The group that is not measured
Correct Answer: B
Rationale: The control group does not receive the experimental treatment and serves as a
baseline for comparison.
,4. What is an independent variable?
A. The variable that is measured
B. The variable that is manipulated
C. The variable that is controlled
D. The variable that is random
Correct Answer: B
Rationale: The independent variable is the factor that is manipulated by the researcher.
5. What is a dependent variable?
A. The variable that is measured
B. The variable that is manipulated
C. The variable that is controlled
D. The variable that is random
Correct Answer: A
Rationale: The dependent variable is the factor that is measured in response to the
independent variable.
6. What is a theory in science?
A. A guess
B. A well-supported explanation
C. A hypothesis
D. A law
Correct Answer: B
Rationale: A scientific theory is a well-supported explanation of a broad range of
phenomena.
7. What is a scientific law?
A. A guess
B. A description of a consistent pattern in nature
C. A hypothesis
D. A theory
, Correct Answer: B
Rationale: A scientific law describes a consistent pattern in nature, often mathematically.
8. What is the difference between a hypothesis and a theory?
A. A hypothesis is broader than a theory
B. A theory is broader and more supported than a hypothesis
C. They are the same
D. A theory is a guess
Correct Answer: B
Rationale: A theory is broader and more extensively supported than a hypothesis.
9. What is a controlled experiment?
A. An experiment with one variable
B. An experiment with multiple variables
C. An experiment without variables
D. An experiment without a control
Correct Answer: A
Rationale: A controlled experiment manipulates one independent variable while holding
others constant.
10. What is a placebo?
A. A treatment with active ingredients
B. A treatment with no active ingredients
C. A control group
D. A dependent variable
Correct Answer: B
Rationale: A placebo is an inactive treatment used in controlled studies.
11. What is a double-blind study?
A. Neither the researcher nor the participant knows the treatment
B. Only the researcher knows the treatment
, C. Only the participant knows the treatment
D. Both know the treatment
Correct Answer: A
Rationale: In a double-blind study, neither the researcher nor the participant knows who
receives the treatment.
12. What is biology?
A. The study of matter
B. The study of living organisms
C. The study of rocks
D. The study of stars
Correct Answer: B
Rationale: Biology is the scientific study of living organisms and their interactions.
13. What are the characteristics of living things?
A. Organization, metabolism, growth, reproduction, response to stimuli
B. Organization only
C. Metabolism only
D. Reproduction only
Correct Answer: A
Rationale: Living things share characteristics including organization, metabolism, growth,
reproduction, and response to stimuli.
14. What is homeostasis?
A. The maintenance of a stable internal environment
B. The disruption of internal balance
C. The growth of an organism
D. The reproduction of an organism
Correct Answer: A
Rationale: Homeostasis is the maintenance of a stable internal environment.
15. What is the biosphere?
