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WGU Introduction-to-Biology Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Genetics and Heredity | 20–25% | - Chromosomes and cell division - Mendelian and non-Mendelian inheritance - Mutation and genetic variation - DNA structure and replication - Gene expression and protein synthesis |
| Topic 2: Ecology and Interdependence | 15–20% | - Ecosystem structure and energy flow - Community interactions - Biomes and global ecology - Population dynamics - Human impact on ecosystems |
| Topic 3: Energy and Metabolism | 15–20% | - Energy flow in biological systems - Enzymes and metabolic pathways - Cellular respiration - Photosynthesis |
| Topic 4: Evolution and Diversity of Life | 15–20% | - Overview of major biological groups - Mechanisms of evolution - Natural selection and adaptation - Speciation and classification |
| Topic 5: Basic Principles of Life | 20–25% | - Scientific method and biological inquiry - Chemical foundations of life - Cell structure and function - Characteristics of living organisms |
WGU Introduction to Biology (KBC1, C190) Sample Questions:
Cities near the ocean often haveless temperature variationbetween winter and summer than inland cities.
Which property of water explains this observation?
- A. Good solvent
- B. Density
- C. Temperature stability
- D. Cohesion
Correct Answer: C 🗳️

Using theTetrapod Cladogram (Node E)and standard vertebrate traits, whichtwo character statesare shared byboth Tiger and Gorilla?(Choose 2 answers)
- A. Loss of tail
- B. Jaw
- C. Three middle ear bones
- D. Fur
Correct Answer: C,D 🗳️
A primary consumer (e.g., an insect) derives energy from which level of the food chain?
- A. Secondary consumer
- B. Primary consumer
- C. Producers
- D. Carnivore
Correct Answer: C 🗳️
A gene sequenceCGCATACGGTACencodes a peptide (Arg-Ile-Arg-Tyr). A mutation inserts aGafter the secondC. How will this most likely affect the phenotype?
- A. Affects phenotype; all amino acids after the first will change (frameshift)
- B. Affects phenotype; only the first amino acid changes
- C. No effect; only the second amino acid changes
- D. No effect; protein will be identical
Correct Answer: A 🗳️
Which comparison ofDNA and RNAis correct?
- A. DNA is a monomer; RNA is a polymer.
- B. DNA is single-stranded; RNA is double-stranded.
- C. DNA uses uracil; RNA uses thymine.
- D. DNA stores hereditary information; RNA is used to make proteins.
Correct Answer: D 🗳️
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