BIOD 103: Essential Biology | Complete Modules 1-7 + Final
Exam Bundle
Questions & Correct Answers (Graded A+) | Verified Answers
| Latest Version 2026/2027
Module 1: The Study of Life (Characteristics of Life, Scientific Method, Chemistry of Life, Biological
Organization)
1. Which of the following is the correct sequence of steps in the scientific method?
A) Make observations and ask a question → Design and perform an experiment → Develop a hypothesis
→ Analyze the data → Share the results with other scientists
B) Make observations and ask a question → Share the results with other scientists → Develop a
hypothesis → Analyze the data → Design and perform an experiment
C) Make observations and ask a question → Analyze the data → Develop a hypothesis → Share the
results with other scientists → Design and perform an experiment
D) Make observations and ask a question → Develop a hypothesis → Design and perform an experiment
→ Analyze the data → Share the results with other scientists
Correct Answer: D – The steps of the scientific method therefore consist of: 1) make observations and
ask a question; 2) develop a hypothesis; 3) design and perform an experiment to test the hypothesis; 4)
analyze the data; and 5) share the results with other scientists.
2. Which of the following is NOT one of the six characteristic features of living things?
A) Organization
B) The ability to acquire materials and energy
C) The ability to maintain homeostasis
D) The ability to change into a different species over time
Correct Answer: D – The six characteristics of living things are: organization, the ability to acquire
materials and energy, the ability to maintain homeostasis, the ability to respond to stimuli, the ability to
reproduce and develop, and the ability to adapt.
3. How is energy defined in biology?
,A) The mass of an organism
B) The ability to do work
C) The breakdown of glucose
D) The ability to replicate DNA
Correct Answer: B – Energy is defined as the “ability to do work.” It comes in many forms (e.g., chemical,
thermal, kinetic) and is essential for all life processes.
4. What process do plants and other photosynthetic organisms use to capture solar energy and convert
it into chemical energy?
A) Cellular respiration
B) Metabolism
C) Photosynthesis
D) Homeostasis
Correct Answer: C – Photosynthesis is the process that plants and other living things use to capture solar
energy and convert it into chemical energy, primarily in the form of carbohydrates.
5. In an ecosystem, which of the following statements best describes the flow of chemicals and energy?
A) Chemicals flow and energy cycles
B) Chemicals cycle and energy flows
C) Both chemicals and energy flow
D) Both chemicals and energy cycle
Correct Answer: B – Within an ecosystem, chemicals cycle and energy flows. Chemicals move from one
population to another through the food chain, and decomposition returns them to the ecosystem.
Energy, however, flows in one direction (from the sun to photosynthesizers to consumers) and must be
constantly replenished.
6. What is an emergent property?
A) A property that disappears at higher levels of complexity
B) A property that emerges as a result of the arrangement and interaction of parts, where “the sum is
more than its parts”
C) A property that is identical at all levels of organization
,D) A property that only applies to single-celled organisms
Correct Answer: B – An emergent property is a new characteristic that appears at a higher level of
organization due to the interactions of components at lower levels. It is often described as the sum
being more than its parts (e.g., a single heart cell cannot pump blood, but a network of heart cells can –
that emergent property is “pumping”).
7. All of the following are true about the pH scale, EXCEPT:
A) The lower the pH number, the stronger the acid
B) The higher the pH number, the stronger the base
C) The higher the pH number, the stronger the acid
D) A pH of 7 is neutral
Correct Answer: C – The pH scale ranges from 0 to 14. Values below 7 are acidic (the lower the number,
the stronger the acid). Values above 7 are basic (alkaline; the higher the number, the stronger the base).
A pH of 7 is neutral. Therefore, option C is false.
8. What term refers to the totality of all chemical reactions that occur in a cell?
A) Homeostasis
B) Metabolism
C) Carbohydrate synthesis
D) Catabolism
Correct Answer: B – Metabolism is defined as all the reactions that occur in a cell. It includes both
anabolism (building complex molecules) and catabolism (breaking down complex molecules).
Metabolism is required for growth, reproduction, and maintaining cellular structure.
9. Which step in the chain of biological organization represents the first level at which life emerges?
A) The atom
B) The molecule
C) The cell
D) The tissue
Correct Answer: C – Atoms and molecules are not alive; they are the chemical building blocks. The cell is
the smallest unit of life that can carry out all the processes of life and is the fundamental structural and
functional unit of living organisms.
, 10. A change in the genetic information of an organism that results in a difference is called:
A) An adaptation
B) Evolution
C) A mutation
D) Natural selection
Correct Answer: C – A mutation is a change in the genetic information (DNA) that may lead to a new
trait or difference. When mutations are beneficial, they can help an organism survive and reproduce,
leading to adaptation over time.
11. Why do many multicellular organisms reproduce sexually?
A) To pass their exact genetic instructions unchanged to the next generation
B) To combine genetic instructions from two parents, creating genetic diversity
C) To increase the number of offspring produced each generation
D) To eliminate the need for DNA in reproduction
Correct Answer: B – Most multicellular organisms reproduce sexually through the union of gametes
(sperm and egg). Sexual reproduction mixes genetic instructions from two parents, resulting in offspring
that are genetically different from either parent, which is a source of genetic diversity.
12. All of the following statements about water (H₂O) are important for life, EXCEPT:
A) Water is a polar molecule that forms hydrogen bonds
B) Water has a high specific heat capacity, helping to moderate temperature
C) Water is a nonpolar solvent that can dissolve nonpolar molecules
D) Water is less dense as a solid (ice) than as a liquid, allowing ice to float
Correct Answer: C – This statement is false. Water is a polar molecule, not nonpolar. Because of its
polarity, water is known as the universal solvent for polar and ionic substances, but it does not readily
dissolve nonpolar molecules like lipids and oils. All of the other statements are true and represent key
properties of water essential for life.
13. The normal pH range of human blood is:
A) 2.0 – 3.0
Exam Bundle
Questions & Correct Answers (Graded A+) | Verified Answers
| Latest Version 2026/2027
Module 1: The Study of Life (Characteristics of Life, Scientific Method, Chemistry of Life, Biological
Organization)
1. Which of the following is the correct sequence of steps in the scientific method?
A) Make observations and ask a question → Design and perform an experiment → Develop a hypothesis
→ Analyze the data → Share the results with other scientists
B) Make observations and ask a question → Share the results with other scientists → Develop a
hypothesis → Analyze the data → Design and perform an experiment
C) Make observations and ask a question → Analyze the data → Develop a hypothesis → Share the
results with other scientists → Design and perform an experiment
D) Make observations and ask a question → Develop a hypothesis → Design and perform an experiment
→ Analyze the data → Share the results with other scientists
Correct Answer: D – The steps of the scientific method therefore consist of: 1) make observations and
ask a question; 2) develop a hypothesis; 3) design and perform an experiment to test the hypothesis; 4)
analyze the data; and 5) share the results with other scientists.
2. Which of the following is NOT one of the six characteristic features of living things?
A) Organization
B) The ability to acquire materials and energy
C) The ability to maintain homeostasis
D) The ability to change into a different species over time
Correct Answer: D – The six characteristics of living things are: organization, the ability to acquire
materials and energy, the ability to maintain homeostasis, the ability to respond to stimuli, the ability to
reproduce and develop, and the ability to adapt.
3. How is energy defined in biology?
,A) The mass of an organism
B) The ability to do work
C) The breakdown of glucose
D) The ability to replicate DNA
Correct Answer: B – Energy is defined as the “ability to do work.” It comes in many forms (e.g., chemical,
thermal, kinetic) and is essential for all life processes.
4. What process do plants and other photosynthetic organisms use to capture solar energy and convert
it into chemical energy?
A) Cellular respiration
B) Metabolism
C) Photosynthesis
D) Homeostasis
Correct Answer: C – Photosynthesis is the process that plants and other living things use to capture solar
energy and convert it into chemical energy, primarily in the form of carbohydrates.
5. In an ecosystem, which of the following statements best describes the flow of chemicals and energy?
A) Chemicals flow and energy cycles
B) Chemicals cycle and energy flows
C) Both chemicals and energy flow
D) Both chemicals and energy cycle
Correct Answer: B – Within an ecosystem, chemicals cycle and energy flows. Chemicals move from one
population to another through the food chain, and decomposition returns them to the ecosystem.
Energy, however, flows in one direction (from the sun to photosynthesizers to consumers) and must be
constantly replenished.
6. What is an emergent property?
A) A property that disappears at higher levels of complexity
B) A property that emerges as a result of the arrangement and interaction of parts, where “the sum is
more than its parts”
C) A property that is identical at all levels of organization
,D) A property that only applies to single-celled organisms
Correct Answer: B – An emergent property is a new characteristic that appears at a higher level of
organization due to the interactions of components at lower levels. It is often described as the sum
being more than its parts (e.g., a single heart cell cannot pump blood, but a network of heart cells can –
that emergent property is “pumping”).
7. All of the following are true about the pH scale, EXCEPT:
A) The lower the pH number, the stronger the acid
B) The higher the pH number, the stronger the base
C) The higher the pH number, the stronger the acid
D) A pH of 7 is neutral
Correct Answer: C – The pH scale ranges from 0 to 14. Values below 7 are acidic (the lower the number,
the stronger the acid). Values above 7 are basic (alkaline; the higher the number, the stronger the base).
A pH of 7 is neutral. Therefore, option C is false.
8. What term refers to the totality of all chemical reactions that occur in a cell?
A) Homeostasis
B) Metabolism
C) Carbohydrate synthesis
D) Catabolism
Correct Answer: B – Metabolism is defined as all the reactions that occur in a cell. It includes both
anabolism (building complex molecules) and catabolism (breaking down complex molecules).
Metabolism is required for growth, reproduction, and maintaining cellular structure.
9. Which step in the chain of biological organization represents the first level at which life emerges?
A) The atom
B) The molecule
C) The cell
D) The tissue
Correct Answer: C – Atoms and molecules are not alive; they are the chemical building blocks. The cell is
the smallest unit of life that can carry out all the processes of life and is the fundamental structural and
functional unit of living organisms.
, 10. A change in the genetic information of an organism that results in a difference is called:
A) An adaptation
B) Evolution
C) A mutation
D) Natural selection
Correct Answer: C – A mutation is a change in the genetic information (DNA) that may lead to a new
trait or difference. When mutations are beneficial, they can help an organism survive and reproduce,
leading to adaptation over time.
11. Why do many multicellular organisms reproduce sexually?
A) To pass their exact genetic instructions unchanged to the next generation
B) To combine genetic instructions from two parents, creating genetic diversity
C) To increase the number of offspring produced each generation
D) To eliminate the need for DNA in reproduction
Correct Answer: B – Most multicellular organisms reproduce sexually through the union of gametes
(sperm and egg). Sexual reproduction mixes genetic instructions from two parents, resulting in offspring
that are genetically different from either parent, which is a source of genetic diversity.
12. All of the following statements about water (H₂O) are important for life, EXCEPT:
A) Water is a polar molecule that forms hydrogen bonds
B) Water has a high specific heat capacity, helping to moderate temperature
C) Water is a nonpolar solvent that can dissolve nonpolar molecules
D) Water is less dense as a solid (ice) than as a liquid, allowing ice to float
Correct Answer: C – This statement is false. Water is a polar molecule, not nonpolar. Because of its
polarity, water is known as the universal solvent for polar and ionic substances, but it does not readily
dissolve nonpolar molecules like lipids and oils. All of the other statements are true and represent key
properties of water essential for life.
13. The normal pH range of human blood is:
A) 2.0 – 3.0
