WGU C190 Objective Assessment Introduction to
Biology (NEW 2026/2027 Update): Complete
Study Guide with Practice Questions & Answers |
Instant Pdf Download
Exam Overview
The WGU C190 Introduction to Biology Objective Assessment tests competency in
fundamental biological concepts ranging from atomic structure to ecosystem dynamics. This
guide provides verified practice questions and answers aligned with the latest 2025/2026
exam updates.
Section 1: Levels of Biological Organization
QUESTION 1: Which represents the smallest level of biological organization?
A) Molecule
B) Atom
C) Cell
D) Tissue
Rationale: The atom is the basic unit of matter and represents the smallest level of
biological organization. Molecules are formed from atoms, cells from molecules, and tissues
from cells.
QUESTION 2: Which level consists of all individuals of a species living within a specific
area?
A) Community
B) Population
C) Ecosystem
, D) Organism
Rationale: A population consists of all individuals of a species living within a specific area.
A community includes multiple populations, and an ecosystem adds abiotic factors.
QUESTION 3: A structure formed when similar cells work together to fulfill the same
detailed function is called a:
A) Tissue
B) Organ
C) Organ system
D) Organism
Rationale: Tissues are formed when similar cells work together to carry out a common
function. Organs are collections of tissues.
Section 2: Chemistry of Life
QUESTION 4: The sum of the number of protons and neutrons in an atom is the:
A) Atomic number
B) Atomic mass
C) Atomic weight
D) Mass defect
Rationale: Atomic mass is the sum of protons and neutrons in an atom's nucleus. Atomic
number is only the number of protons.
QUESTION 5: Which subatomic particle has a negative charge and almost no mass?
A) Proton
B) Neutron
C) Electron
D) Positron
Rationale: Electrons are negatively charged subatomic particles located in shells
surrounding the nucleus, with negligible mass.
Biology (NEW 2026/2027 Update): Complete
Study Guide with Practice Questions & Answers |
Instant Pdf Download
Exam Overview
The WGU C190 Introduction to Biology Objective Assessment tests competency in
fundamental biological concepts ranging from atomic structure to ecosystem dynamics. This
guide provides verified practice questions and answers aligned with the latest 2025/2026
exam updates.
Section 1: Levels of Biological Organization
QUESTION 1: Which represents the smallest level of biological organization?
A) Molecule
B) Atom
C) Cell
D) Tissue
Rationale: The atom is the basic unit of matter and represents the smallest level of
biological organization. Molecules are formed from atoms, cells from molecules, and tissues
from cells.
QUESTION 2: Which level consists of all individuals of a species living within a specific
area?
A) Community
B) Population
C) Ecosystem
, D) Organism
Rationale: A population consists of all individuals of a species living within a specific area.
A community includes multiple populations, and an ecosystem adds abiotic factors.
QUESTION 3: A structure formed when similar cells work together to fulfill the same
detailed function is called a:
A) Tissue
B) Organ
C) Organ system
D) Organism
Rationale: Tissues are formed when similar cells work together to carry out a common
function. Organs are collections of tissues.
Section 2: Chemistry of Life
QUESTION 4: The sum of the number of protons and neutrons in an atom is the:
A) Atomic number
B) Atomic mass
C) Atomic weight
D) Mass defect
Rationale: Atomic mass is the sum of protons and neutrons in an atom's nucleus. Atomic
number is only the number of protons.
QUESTION 5: Which subatomic particle has a negative charge and almost no mass?
A) Proton
B) Neutron
C) Electron
D) Positron
Rationale: Electrons are negatively charged subatomic particles located in shells
surrounding the nucleus, with negligible mass.
