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WGU C190 INTRO TO BIOLOGY FINAL EXAM AND PRE ASSESSMENT EXAM 2024
ACTUAL EXAM COMPLETE 500 QUESTIONS WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS) / WITH RATIONALES
1. What does "abiotic" mean?
A) Living organisms
B) Non-living, may be within or made by a living organism
C) Made of cells
D) A type of macromolecule
Answer: B) Non-living, may be within or made by a living organism
Rationale: Abiotic refers to non-living components, which can exist independently or be part of living
systems (e.g., bones in an organism).
2. Which of the following defines "biotic"?
A) Non-living matter
B) Matter that was never alive
C) Living or matter that was once alive
D) A type of molecule
Answer: C) Living or matter that was once alive
Rationale: Biotic refers to living organisms or matter that was once part of a living organism.
3. What is the smallest unit of matter?
A) Molecule
B) Atom
C) Cell
D) Organelle
Answer: B) Atom
Rationale: Atoms are the basic building blocks of matter, consisting of protons, neutrons, and electrons.
4. What is a molecule?
A) A single atom
B) A group of cells
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C) A chemical structure of at least two atoms held together by a bond
D) A type of tissue
Answer: C) A chemical structure of at least two atoms held together by a bond
Rationale: Molecules are formed when two or more atoms bond together chemically.
5. Which of the following is an example of a macromolecule?
A) Water
B) DNA
C) Oxygen
D) Sodium chloride
Answer: B) DNA
Rationale: DNA is a biologically important macromolecule and a polymer made of nucleotides.
6. What is the fundamental unit of life?
A) Atom
B) Molecule
C) Cell
D) Organ
Answer: C) Cell
Rationale: Cells are the smallest entities that possess all the characteristics of life.
7. What is an organelle?
A) A type of tissue
B) A compartment inside a cell that carries out specific functions
C) A single-celled organism
D) A group of organs
Answer: B) A compartment inside a cell that carries out specific functions
Rationale: Organelles are specialized structures within cells, such as the nucleus or mitochondria.
8. Which of the following is a microorganism?
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A) Human
B) Tree
C) Bacteria
D) Rock
Answer: C) Bacteria
Rationale: Microorganisms are single-celled organisms, such as bacteria and protists.
9. What is tissue?
A) A group of organs
B) A group of similar cells working together
C) A single cell
D) A type of molecule
Answer: B) A group of similar cells working together
Rationale: Tissues are formed when cells with similar functions group together.
10. What is an organ?
A) A single cell
B) A group of tissues working together
C) A type of molecule
D) A group of organelles
Answer: B) A group of tissues working together
Rationale: Organs are collections of tissues that perform a common function, such as the heart or liver.
11. What is an organ system?
A) A group of organs working together
B) A single tissue
C) A type of cell
D) A group of molecules
Answer: A) A group of organs working together
Rationale: Organ systems consist of functionally related organs, such as the digestive system.
12. What is an organism?
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A) A group of populations
B) A single living entity
C) A type of tissue
D) A group of cells
Answer: B) A single living entity
Rationale: An organism is an individual living being, such as a tree or a human.
13. What is a population?
A) A group of different species
B) All individuals of a species in a specific area
C) A single organism
D) A type of ecosystem
Answer: B) All individuals of a species in a specific area
Rationale: A population consists of all members of a single species living in a defined area.
14. What is a community?
A) A group of populations interacting in an area
B) A single organism
C) A type of tissue
D) A group of cells
Answer: A) A group of populations interacting in an area
Rationale: A community includes multiple populations interacting in a shared environment.
15. What is an ecosystem?
A) A group of organisms
B) Living and nonliving components in an area
C) A single cell
D) A type of molecule
Answer: B) Living and nonliving components in an area
Rationale: An ecosystem includes both biotic (living) and abiotic (nonliving) components.
16. What is the biosphere?
WGU C190 INTRO TO BIOLOGY FINAL EXAM AND PRE ASSESSMENT EXAM 2024
ACTUAL EXAM COMPLETE 500 QUESTIONS WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS) / WITH RATIONALES
1. What does "abiotic" mean?
A) Living organisms
B) Non-living, may be within or made by a living organism
C) Made of cells
D) A type of macromolecule
Answer: B) Non-living, may be within or made by a living organism
Rationale: Abiotic refers to non-living components, which can exist independently or be part of living
systems (e.g., bones in an organism).
2. Which of the following defines "biotic"?
A) Non-living matter
B) Matter that was never alive
C) Living or matter that was once alive
D) A type of molecule
Answer: C) Living or matter that was once alive
Rationale: Biotic refers to living organisms or matter that was once part of a living organism.
3. What is the smallest unit of matter?
A) Molecule
B) Atom
C) Cell
D) Organelle
Answer: B) Atom
Rationale: Atoms are the basic building blocks of matter, consisting of protons, neutrons, and electrons.
4. What is a molecule?
A) A single atom
B) A group of cells
,estudyr
C) A chemical structure of at least two atoms held together by a bond
D) A type of tissue
Answer: C) A chemical structure of at least two atoms held together by a bond
Rationale: Molecules are formed when two or more atoms bond together chemically.
5. Which of the following is an example of a macromolecule?
A) Water
B) DNA
C) Oxygen
D) Sodium chloride
Answer: B) DNA
Rationale: DNA is a biologically important macromolecule and a polymer made of nucleotides.
6. What is the fundamental unit of life?
A) Atom
B) Molecule
C) Cell
D) Organ
Answer: C) Cell
Rationale: Cells are the smallest entities that possess all the characteristics of life.
7. What is an organelle?
A) A type of tissue
B) A compartment inside a cell that carries out specific functions
C) A single-celled organism
D) A group of organs
Answer: B) A compartment inside a cell that carries out specific functions
Rationale: Organelles are specialized structures within cells, such as the nucleus or mitochondria.
8. Which of the following is a microorganism?
,estudyr
A) Human
B) Tree
C) Bacteria
D) Rock
Answer: C) Bacteria
Rationale: Microorganisms are single-celled organisms, such as bacteria and protists.
9. What is tissue?
A) A group of organs
B) A group of similar cells working together
C) A single cell
D) A type of molecule
Answer: B) A group of similar cells working together
Rationale: Tissues are formed when cells with similar functions group together.
10. What is an organ?
A) A single cell
B) A group of tissues working together
C) A type of molecule
D) A group of organelles
Answer: B) A group of tissues working together
Rationale: Organs are collections of tissues that perform a common function, such as the heart or liver.
11. What is an organ system?
A) A group of organs working together
B) A single tissue
C) A type of cell
D) A group of molecules
Answer: A) A group of organs working together
Rationale: Organ systems consist of functionally related organs, such as the digestive system.
12. What is an organism?
, estudyr
A) A group of populations
B) A single living entity
C) A type of tissue
D) A group of cells
Answer: B) A single living entity
Rationale: An organism is an individual living being, such as a tree or a human.
13. What is a population?
A) A group of different species
B) All individuals of a species in a specific area
C) A single organism
D) A type of ecosystem
Answer: B) All individuals of a species in a specific area
Rationale: A population consists of all members of a single species living in a defined area.
14. What is a community?
A) A group of populations interacting in an area
B) A single organism
C) A type of tissue
D) A group of cells
Answer: A) A group of populations interacting in an area
Rationale: A community includes multiple populations interacting in a shared environment.
15. What is an ecosystem?
A) A group of organisms
B) Living and nonliving components in an area
C) A single cell
D) A type of molecule
Answer: B) Living and nonliving components in an area
Rationale: An ecosystem includes both biotic (living) and abiotic (nonliving) components.
16. What is the biosphere?
