WGU C190 INTRO TO BIOLOGY FINAL EXAM
AND PRE ASSESSMENT EXAM 2025/2026 ACTUAL
EXAM COMPLETE 500 QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS)
/ALREADY GRADED A+
, Competency 1: The Scientific Method & Characteristics of Life
1. Which of the following is NOT a characteristic of all living organisms?
Correct Answer: The ability to move from place to place
Rationale: Not all organisms are motile (e.g., plants, fungi). The true characteristics include:
cells, organization, energy use, homeostasis, growth, reproduction, response to stimuli, and
evolution.
2. A scientist observes that plants grow taller when exposed to more sunlight. Which step of
the scientific method does this represent?
Correct Answer: Observation
Rationale: Observation is the first step—gathering information about the natural world.
3. A researcher predicts that "if fertilizer is added to soil, then tomato plants will produce
more fruit." This statement is an example of a(n):
Correct Answer: Hypothesis
Rationale: A hypothesis is a testable prediction, often structured as an "if/then" statement.
4. In an experiment, the group that does NOT receive the treatment is called the:
Correct Answer: Control group
Rationale: The control group provides a baseline to compare against the experimental group.
5. Which of the following is a scientific theory?
Correct Answer: The theory of evolution by natural selection
, Rationale: A theory is a well-tested, widely accepted explanation supported by extensive
evidence.
6. What is the difference between a hypothesis and a theory?
Correct Answer: A hypothesis is a specific testable prediction; a theory is a broad explanation
supported by many lines of evidence
Rationale: Theories are broader and more established than hypotheses.
Competency 2: Chemistry of Life
7. What is the most abundant molecule in living organisms?
Correct Answer: Water (H₂O)
Rationale: Water constitutes 70-90% of most organisms and is essential for life.
8. Which property of water allows it to stick to itself and form droplets?
Correct Answer: Cohesion
Rationale: Cohesion is the attraction between water molecules due to hydrogen bonding.
9. What property of water allows it to dissolve many substances?
Correct Answer: Polarity/Universal solvent
Rationale: Water is polar, making it an excellent solvent for ionic and polar compounds.
10. A solution with a pH of 8 is considered:
Correct Answer: Basic (alkaline)
AND PRE ASSESSMENT EXAM 2025/2026 ACTUAL
EXAM COMPLETE 500 QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT ANSWERS)
/ALREADY GRADED A+
, Competency 1: The Scientific Method & Characteristics of Life
1. Which of the following is NOT a characteristic of all living organisms?
Correct Answer: The ability to move from place to place
Rationale: Not all organisms are motile (e.g., plants, fungi). The true characteristics include:
cells, organization, energy use, homeostasis, growth, reproduction, response to stimuli, and
evolution.
2. A scientist observes that plants grow taller when exposed to more sunlight. Which step of
the scientific method does this represent?
Correct Answer: Observation
Rationale: Observation is the first step—gathering information about the natural world.
3. A researcher predicts that "if fertilizer is added to soil, then tomato plants will produce
more fruit." This statement is an example of a(n):
Correct Answer: Hypothesis
Rationale: A hypothesis is a testable prediction, often structured as an "if/then" statement.
4. In an experiment, the group that does NOT receive the treatment is called the:
Correct Answer: Control group
Rationale: The control group provides a baseline to compare against the experimental group.
5. Which of the following is a scientific theory?
Correct Answer: The theory of evolution by natural selection
, Rationale: A theory is a well-tested, widely accepted explanation supported by extensive
evidence.
6. What is the difference between a hypothesis and a theory?
Correct Answer: A hypothesis is a specific testable prediction; a theory is a broad explanation
supported by many lines of evidence
Rationale: Theories are broader and more established than hypotheses.
Competency 2: Chemistry of Life
7. What is the most abundant molecule in living organisms?
Correct Answer: Water (H₂O)
Rationale: Water constitutes 70-90% of most organisms and is essential for life.
8. Which property of water allows it to stick to itself and form droplets?
Correct Answer: Cohesion
Rationale: Cohesion is the attraction between water molecules due to hydrogen bonding.
9. What property of water allows it to dissolve many substances?
Correct Answer: Polarity/Universal solvent
Rationale: Water is polar, making it an excellent solvent for ionic and polar compounds.
10. A solution with a pH of 8 is considered:
Correct Answer: Basic (alkaline)
