BIOL 1408 actual Exam 1 | Biology for Non-Science Majors I |
2026/2027 Complete Practice Questions, Correct Answers &
Detailed Rationales
Section I: Introduction to Biology & Scientific Reasoning
1. Which statement best defines biology?
A. The study of nonliving chemicals
B. The study of life and living organisms
C. The study of Earth's physical structure
D. The study of human history
Correct Answer: B. The study of life and living organisms
Rationale: Biology is the scientific study of life, including organisms,
their structures, functions, interactions, and evolution.
2. Which characteristic is shared by all living organisms?
A. They all move from place to place
B. They all contain chloroplasts
C. They maintain some degree of homeostasis
D. They all reproduce sexually
Correct Answer: C. They maintain some degree of homeostasis
Rationale: Living organisms regulate internal conditions to maintain
relatively stable environments.
3. What is homeostasis?
A. Production of offspring
B. Maintenance of relatively stable internal conditions
,C. Movement of organisms
D. Conversion of DNA into RNA
Correct Answer: B. Maintenance of relatively stable internal
conditions
Rationale: Homeostasis allows organisms to maintain appropriate
internal conditions despite external changes.
4. Which level of biological organization is immediately above the
cellular level?
A. Tissue
B. Organ
C. Organ system
D. Organism
Correct Answer: A. Tissue
Rationale: Cells combine to form tissues, tissues form organs, and
organs form organ systems.
5. Which level of organization includes several interacting organs?
A. Cell
B. Tissue
C. Organ system
D. Molecule
Correct Answer: C. Organ system
Rationale: An organ system consists of multiple organs working
together to perform major functions.
6. Which statement best describes an organism?
A. A single atom
B. An individual living thing
,C. A group of identical molecules
D. A nonliving structure
Correct Answer: B. An individual living thing
Rationale: An organism is an individual living entity capable of carrying
out life processes.
7. Which biological process allows organisms to produce new
organisms?
A. Metabolism
B. Reproduction
C. Diffusion
D. Digestion
Correct Answer: B. Reproduction
Rationale: Reproduction produces new individuals and allows genetic
information to be passed to offspring.
8. Why is DNA important to living organisms?
A. It provides genetic information
B. It produces all cellular energy directly
C. It dissolves biological molecules
D. It replaces water
Correct Answer: A. It provides genetic information
Rationale: DNA stores hereditary information used to direct cellular
activities and biological development.
9. Which statement describes metabolism?
A. All chemical reactions occurring within an organism
B. Movement of an organism through space
, C. Production of offspring only
D. Exchange of gases only
Correct Answer: A. All chemical reactions occurring within an
organism
Rationale: Metabolism includes the interconnected chemical reactions
that maintain life.
10. Which process involves organisms responding to changes in their
environment?
A. Stimulus-response
B. Photosynthesis only
C. Replication
D. Translation
Correct Answer: A. Stimulus-response
Rationale: Living organisms detect and respond to environmental or
internal stimuli.
11. Which statement about scientific knowledge is most accurate?
A. Scientific explanations cannot change
B. Scientific conclusions are based on evidence
C. Scientists never disagree
D. Scientific claims require no testing
Correct Answer: B. Scientific conclusions are based on evidence
Rationale: Scientific knowledge develops through observations, testing,
evidence, and repeated evaluation.
12. What is an observation?
A. A testable explanation
B. Information obtained through observation or measurement
2026/2027 Complete Practice Questions, Correct Answers &
Detailed Rationales
Section I: Introduction to Biology & Scientific Reasoning
1. Which statement best defines biology?
A. The study of nonliving chemicals
B. The study of life and living organisms
C. The study of Earth's physical structure
D. The study of human history
Correct Answer: B. The study of life and living organisms
Rationale: Biology is the scientific study of life, including organisms,
their structures, functions, interactions, and evolution.
2. Which characteristic is shared by all living organisms?
A. They all move from place to place
B. They all contain chloroplasts
C. They maintain some degree of homeostasis
D. They all reproduce sexually
Correct Answer: C. They maintain some degree of homeostasis
Rationale: Living organisms regulate internal conditions to maintain
relatively stable environments.
3. What is homeostasis?
A. Production of offspring
B. Maintenance of relatively stable internal conditions
,C. Movement of organisms
D. Conversion of DNA into RNA
Correct Answer: B. Maintenance of relatively stable internal
conditions
Rationale: Homeostasis allows organisms to maintain appropriate
internal conditions despite external changes.
4. Which level of biological organization is immediately above the
cellular level?
A. Tissue
B. Organ
C. Organ system
D. Organism
Correct Answer: A. Tissue
Rationale: Cells combine to form tissues, tissues form organs, and
organs form organ systems.
5. Which level of organization includes several interacting organs?
A. Cell
B. Tissue
C. Organ system
D. Molecule
Correct Answer: C. Organ system
Rationale: An organ system consists of multiple organs working
together to perform major functions.
6. Which statement best describes an organism?
A. A single atom
B. An individual living thing
,C. A group of identical molecules
D. A nonliving structure
Correct Answer: B. An individual living thing
Rationale: An organism is an individual living entity capable of carrying
out life processes.
7. Which biological process allows organisms to produce new
organisms?
A. Metabolism
B. Reproduction
C. Diffusion
D. Digestion
Correct Answer: B. Reproduction
Rationale: Reproduction produces new individuals and allows genetic
information to be passed to offspring.
8. Why is DNA important to living organisms?
A. It provides genetic information
B. It produces all cellular energy directly
C. It dissolves biological molecules
D. It replaces water
Correct Answer: A. It provides genetic information
Rationale: DNA stores hereditary information used to direct cellular
activities and biological development.
9. Which statement describes metabolism?
A. All chemical reactions occurring within an organism
B. Movement of an organism through space
, C. Production of offspring only
D. Exchange of gases only
Correct Answer: A. All chemical reactions occurring within an
organism
Rationale: Metabolism includes the interconnected chemical reactions
that maintain life.
10. Which process involves organisms responding to changes in their
environment?
A. Stimulus-response
B. Photosynthesis only
C. Replication
D. Translation
Correct Answer: A. Stimulus-response
Rationale: Living organisms detect and respond to environmental or
internal stimuli.
11. Which statement about scientific knowledge is most accurate?
A. Scientific explanations cannot change
B. Scientific conclusions are based on evidence
C. Scientists never disagree
D. Scientific claims require no testing
Correct Answer: B. Scientific conclusions are based on evidence
Rationale: Scientific knowledge develops through observations, testing,
evidence, and repeated evaluation.
12. What is an observation?
A. A testable explanation
B. Information obtained through observation or measurement
