, BIOL 101 MODULE 2 EXAM
Essential Biology I w/Lab
Portage Learning
100-Question Practice Examination
2026/2027 Edition
BIOL 101 Module 2 Exam | Essential Biology I w/Lab | Portage Learning | Q & A | 2026/2027 Edition
(PDF)
1. A biologist observes that an organism keeps its internal salt concentration within a narrow
range despite changing external conditions. Which characteristic of life is most directly
demonstrated? A) Reproduction
B) Evolutionary adaptation
C) Regulation (homeostasis)
D) Growth and development
Correct Answer: Regulation (homeostasis)
Rationale: Maintaining a relatively stable internal environment despite external change is regulation, commonly
called homeostasis. Reproduction produces offspring, growth and development involve ordered change over
time, and evolutionary adaptation occurs across generations. The observation specifically concerns internal
control, so regulation is the best match.
2. Which observation best illustrates evolutionary adaptation rather than an individual short-term
response?
A) A lizard moves into shade when the temperature rises
B) A person sweats during exercise
C) A plant bends toward a light source over several days
D) Over many generations, darker beetles become more common on dark soil because they survivepredation
better
Correct Answer: Over many generations, darker beetles become more common on dark soil because they
survive predation better
Rationale: Evolutionary adaptation changes inherited traits in a population across generations through differential
survival and reproduction. Moving to shade, sweating, and bending toward light are responses by individual
organisms during their lifetimes. They may improve short-term performance but do not by themselves represent
population-level genetic change.
3. A seedling increases in size and develops specialized leaves. Which pair of characteristics of life
is most clearly shown?
A) Growth and development
B) Regulation and reproduction
C) Order and energy processing
D) Evolutionary adaptation and response
BIOL 101 Module 2 Practice Examination | 2026/2027 Edition | Page 1
, Correct Answer: Growth and development
Rationale: Growth refers to an increase in size or cell number, whereas development involves ordered changes
in form and function. The seedling example includes both. Although the plant also uses energy and is organized,
those features are not the main processes described by increasing size and forming specialized leaves.
4. Why is energy processing considered a universal characteristic of living organisms?
A) All organisms obtain energy directly from sunlight
B) Cells must transform energy to power metabolism, maintenance, growth, and other cellular work
C) All organisms store energy only as glucose
D) Energy processing occurs only during reproduction
Correct Answer: Cells must transform energy to power metabolism, maintenance, growth, and other
cellular work
Rationale: Living cells require continual energy transformations to perform chemical, transport, and mechanical
work. Organisms differ in how they obtain energy; not all use sunlight or store energy only as glucose. Energy
use is required throughout life, not merely during reproduction, making energy processing a broad biological
characteristic.
5. A bacterium detects nutrients and swims toward the higher concentration. Which characteristic of
life is illustrated most directly?
A) Growth and development
B) Response to the environment
C) Reproduction
D) Evolutionary adaptation
Correct Answer: Response to the environment
Rationale: Directed movement toward a chemical cue is a response to an environmental stimulus. Growth and
reproduction involve changes in size or production of offspring, while evolutionary adaptation refers to heritable
population changes over generations. The immediate behavioral change best fits environmental responsiveness.
6. Which example best demonstrates biological order?
A) A cell contains organized structures that perform specialized functions
B) A population changes allele frequencies over generations
C) An organism produces offspring
D) An animal moves away from a predator
Correct Answer: A cell contains organized structures that perform specialized functions
Rationale: Biological order refers to the highly organized arrangement of living systems, from molecules and
organelles to cells and organisms. Specialized internal cellular structures demonstrate this organization directly.
The other examples show evolution, reproduction, and environmental response rather than structural order.
7. A yeast cell forms a small outgrowth that enlarges and separates as a new individual. This is an
example of which reproductive mode?
A) Binary fission
B) Fragmentation
C) Spore formation
D) Budding
BIOL 101 Module 2 Practice Examination | 2026/2027 Edition | Page 2
Essential Biology I w/Lab
Portage Learning
100-Question Practice Examination
2026/2027 Edition
BIOL 101 Module 2 Exam | Essential Biology I w/Lab | Portage Learning | Q & A | 2026/2027 Edition
(PDF)
1. A biologist observes that an organism keeps its internal salt concentration within a narrow
range despite changing external conditions. Which characteristic of life is most directly
demonstrated? A) Reproduction
B) Evolutionary adaptation
C) Regulation (homeostasis)
D) Growth and development
Correct Answer: Regulation (homeostasis)
Rationale: Maintaining a relatively stable internal environment despite external change is regulation, commonly
called homeostasis. Reproduction produces offspring, growth and development involve ordered change over
time, and evolutionary adaptation occurs across generations. The observation specifically concerns internal
control, so regulation is the best match.
2. Which observation best illustrates evolutionary adaptation rather than an individual short-term
response?
A) A lizard moves into shade when the temperature rises
B) A person sweats during exercise
C) A plant bends toward a light source over several days
D) Over many generations, darker beetles become more common on dark soil because they survivepredation
better
Correct Answer: Over many generations, darker beetles become more common on dark soil because they
survive predation better
Rationale: Evolutionary adaptation changes inherited traits in a population across generations through differential
survival and reproduction. Moving to shade, sweating, and bending toward light are responses by individual
organisms during their lifetimes. They may improve short-term performance but do not by themselves represent
population-level genetic change.
3. A seedling increases in size and develops specialized leaves. Which pair of characteristics of life
is most clearly shown?
A) Growth and development
B) Regulation and reproduction
C) Order and energy processing
D) Evolutionary adaptation and response
BIOL 101 Module 2 Practice Examination | 2026/2027 Edition | Page 1
, Correct Answer: Growth and development
Rationale: Growth refers to an increase in size or cell number, whereas development involves ordered changes
in form and function. The seedling example includes both. Although the plant also uses energy and is organized,
those features are not the main processes described by increasing size and forming specialized leaves.
4. Why is energy processing considered a universal characteristic of living organisms?
A) All organisms obtain energy directly from sunlight
B) Cells must transform energy to power metabolism, maintenance, growth, and other cellular work
C) All organisms store energy only as glucose
D) Energy processing occurs only during reproduction
Correct Answer: Cells must transform energy to power metabolism, maintenance, growth, and other
cellular work
Rationale: Living cells require continual energy transformations to perform chemical, transport, and mechanical
work. Organisms differ in how they obtain energy; not all use sunlight or store energy only as glucose. Energy
use is required throughout life, not merely during reproduction, making energy processing a broad biological
characteristic.
5. A bacterium detects nutrients and swims toward the higher concentration. Which characteristic of
life is illustrated most directly?
A) Growth and development
B) Response to the environment
C) Reproduction
D) Evolutionary adaptation
Correct Answer: Response to the environment
Rationale: Directed movement toward a chemical cue is a response to an environmental stimulus. Growth and
reproduction involve changes in size or production of offspring, while evolutionary adaptation refers to heritable
population changes over generations. The immediate behavioral change best fits environmental responsiveness.
6. Which example best demonstrates biological order?
A) A cell contains organized structures that perform specialized functions
B) A population changes allele frequencies over generations
C) An organism produces offspring
D) An animal moves away from a predator
Correct Answer: A cell contains organized structures that perform specialized functions
Rationale: Biological order refers to the highly organized arrangement of living systems, from molecules and
organelles to cells and organisms. Specialized internal cellular structures demonstrate this organization directly.
The other examples show evolution, reproduction, and environmental response rather than structural order.
7. A yeast cell forms a small outgrowth that enlarges and separates as a new individual. This is an
example of which reproductive mode?
A) Binary fission
B) Fragmentation
C) Spore formation
D) Budding
BIOL 101 Module 2 Practice Examination | 2026/2027 Edition | Page 2
