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WGU Introduction-to-Biology Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Energy and Metabolism | 15–20% | - Enzymes and metabolic pathways - Cellular respiration - Energy flow in biological systems - Photosynthesis |
| Topic 2: Basic Principles of Life | 20–25% | - Scientific method and biological inquiry - Cell structure and function - Chemical foundations of life - Characteristics of living organisms |
| Topic 3: Ecology and Interdependence | 15–20% | - Population dynamics - Human impact on ecosystems - Community interactions - Biomes and global ecology - Ecosystem structure and energy flow |
| Topic 4: Genetics and Heredity | 20–25% | - Mutation and genetic variation - Mendelian and non-Mendelian inheritance - Chromosomes and cell division - DNA structure and replication - Gene expression and protein synthesis |
| Topic 5: Evolution and Diversity of Life | 15–20% | - Natural selection and adaptation - Overview of major biological groups - Speciation and classification - Mechanisms of evolution |
WGU Introduction to Biology (KBC1, C190) Sample Questions:
Question 1

Using theTetrapod Cladogram (Node E), the common ancestor at locationEgives rise to which two organisms?(Choose 2 answers)
A. Gorilla
B. Salamander
C. Lizard
D. Tiger
Question 2
Which molecule isproducedby photosynthesis?
A. NADH
B. Oxygen
C. Water
D. Carbon dioxide
Question 3
A gardener performs amonohybrid crosson twoheterozygousorange-fruited tomato plants. Therecessive phenotypeis yellow fruit. What percentage of offspring will produceyellowtomatoes?
A. 25%
B. 100%
C. 50%
D. 75%
Question 4
The nucleus contains chromosomes that are replicated and passed to the next generation. One of the two macromolecules in chromosomes is themolecule of heredity. Which molecule is the hereditary material?
A. Proteins
B. DNA
C. Carbohydrates
D. RNA
Question 5
Arctic foxes sometimes follow polar bears and scavenge leftovers after the bears finish eating. What interaction occurs?
A. Parasitism
B. Predation
C. Commensalism
D. Herbivory
Solutions:
| Question 1 Answer: A,D | Question 2 Answer: B | Question 3 Answer: A | Question 4 Answer: B | Question 5 Answer: C |




