BIOLOGY 189 EXAM TEST
BANK Exam Questions And
Correct Answers (Verified
Answers) Plus Rationales
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1. Which of the following is a characteristic of life?
a) Evolution
b) Reproduction
c) Homeostasis
d) All of the above
e) None of the above
Answer: d) All of the above
Rationale: All living organisms share five key characteristics:
organization, energy use, homeostasis,
reproduction/growth/development, and evolution .
2. All of the following are characteristics of life EXCEPT:
a) Evolution
b) Reproduction
c) Homeostasis
,d) Multicellularity
e) Growth and development
Answer: d) Multicellularity
Rationale: While many organisms are multicellular, some
living organisms (like bacteria and many protists) are
unicellular. Multicellularity is not a requirement for life .
3. The concentration of salts in blood remains relatively
steady regardless of a person's diet. This situation best
illustrates:
a) Homeostasis
b) Life's organizational hierarchy
c) Autotrophy
d) Evolution
e) Metabolism
Answer: a) Homeostasis
Rationale: Homeostasis is the maintenance of internal
consistency. Kidneys regulating water balance and salt
concentration in blood is a classic example .
4. A kitten uses energy from its mother's milk to fuel its
growth. This demonstrates which characteristic of life?
a) Organization
b) Energy use
c) Homeostasis
,d) Evolution
e) Reproduction
Answer: b) Energy use
Rationale: All living organisms require energy to fuel
metabolic processes, growth, and development .
5. Increasing numbers of bacteria surviving treatment with
antibiotic drugs is an example of:
a) Homeostasis
b) Energy use
c) Organization
d) Evolution
e) Reproduction
Answer: d) Evolution
Rationale: Evolution occurs when populations change over
time through natural selection. Bacteria developing
resistance to antibiotics is a classic example of evolution in
action .
6. The smallest chemical unit of a pure substance is a(n):
a) Molecule
b) Organelle
c) Cell
d) Atom
e) Tissue
, Answer: d) Atom
Rationale: Atoms are the fundamental units of matter. They
combine to form molecules, which form organelles, cells, and
higher levels of organization .
7. Which of the following represents the correct hierarchy
of life's organization from smallest to largest?
a) Atom → Molecule → Cell → Organelle → Tissue → Organ
→ Organ system → Organism
b) Atom → Molecule → Organelle → Cell → Tissue → Organ
→ Organ system → Organism
c) Molecule → Atom → Organelle → Cell → Tissue → Organ
→ Organism → Organ system
d) Cell → Tissue → Organ → Organelle → Molecule → Atom
→ Organism
e) Atom → Cell → Molecule → Tissue → Organ → Organ
system → Organism
Answer: b) Atom → Molecule → Organelle → Cell → Tissue
→ Organ → Organ system → Organism
Rationale: The correct hierarchy is: atom → molecule →
organelle → cell → tissue → organ → organ system →
organism → population → community → ecosystem →
biosphere .
8. Which of the following is smaller than an organelle?
BANK Exam Questions And
Correct Answers (Verified
Answers) Plus Rationales
2025/2026 Q&A | Instant
Download Pdf
1. Which of the following is a characteristic of life?
a) Evolution
b) Reproduction
c) Homeostasis
d) All of the above
e) None of the above
Answer: d) All of the above
Rationale: All living organisms share five key characteristics:
organization, energy use, homeostasis,
reproduction/growth/development, and evolution .
2. All of the following are characteristics of life EXCEPT:
a) Evolution
b) Reproduction
c) Homeostasis
,d) Multicellularity
e) Growth and development
Answer: d) Multicellularity
Rationale: While many organisms are multicellular, some
living organisms (like bacteria and many protists) are
unicellular. Multicellularity is not a requirement for life .
3. The concentration of salts in blood remains relatively
steady regardless of a person's diet. This situation best
illustrates:
a) Homeostasis
b) Life's organizational hierarchy
c) Autotrophy
d) Evolution
e) Metabolism
Answer: a) Homeostasis
Rationale: Homeostasis is the maintenance of internal
consistency. Kidneys regulating water balance and salt
concentration in blood is a classic example .
4. A kitten uses energy from its mother's milk to fuel its
growth. This demonstrates which characteristic of life?
a) Organization
b) Energy use
c) Homeostasis
,d) Evolution
e) Reproduction
Answer: b) Energy use
Rationale: All living organisms require energy to fuel
metabolic processes, growth, and development .
5. Increasing numbers of bacteria surviving treatment with
antibiotic drugs is an example of:
a) Homeostasis
b) Energy use
c) Organization
d) Evolution
e) Reproduction
Answer: d) Evolution
Rationale: Evolution occurs when populations change over
time through natural selection. Bacteria developing
resistance to antibiotics is a classic example of evolution in
action .
6. The smallest chemical unit of a pure substance is a(n):
a) Molecule
b) Organelle
c) Cell
d) Atom
e) Tissue
, Answer: d) Atom
Rationale: Atoms are the fundamental units of matter. They
combine to form molecules, which form organelles, cells, and
higher levels of organization .
7. Which of the following represents the correct hierarchy
of life's organization from smallest to largest?
a) Atom → Molecule → Cell → Organelle → Tissue → Organ
→ Organ system → Organism
b) Atom → Molecule → Organelle → Cell → Tissue → Organ
→ Organ system → Organism
c) Molecule → Atom → Organelle → Cell → Tissue → Organ
→ Organism → Organ system
d) Cell → Tissue → Organ → Organelle → Molecule → Atom
→ Organism
e) Atom → Cell → Molecule → Tissue → Organ → Organ
system → Organism
Answer: b) Atom → Molecule → Organelle → Cell → Tissue
→ Organ → Organ system → Organism
Rationale: The correct hierarchy is: atom → molecule →
organelle → cell → tissue → organ → organ system →
organism → population → community → ecosystem →
biosphere .
8. Which of the following is smaller than an organelle?
