Biology Evolutionary Science

Evolution: The Evidence and the Mechanisms

A clear, evidence-based course on how evolution works and why it is central to modern biology

Evolution: The Evidence and the Mechanisms logo
Quick Course Facts
20
Self-paced, Online, Lessons
20
Videos and/or Narrated Presentations
6.9
Approximate Hours of Course Media
About the Evolution: The Evidence and the Mechanisms Course

Evolution: The Evidence and the Mechanisms is a Biology course that explains how evolution works, what evidence supports it, and why it is central to modern biology. Students will build a clear, evidence-based understanding of evolutionary thinking, from Darwin and Wallace to DNA, fossils, natural selection, and real-time evolutionary change.

Explore The Evidence And Mechanisms Of Evolution In Biology

  • Learn how evolution functions as a scientific explanation supported by multiple lines of evidence.
  • Connect fossils, anatomy, embryology, biogeography, and molecular Biology into one coherent framework.
  • Understand the mechanisms that drive evolutionary change, including mutation, selection, drift, gene flow, and sexual selection.
  • Apply evolutionary thinking to speciation, human evolution, disease, resistance, extinction, and modern biological research.

A clear, evidence-based course on how evolution works and why it is central to modern biology.

Evolution: The Evidence and the Mechanisms guides students through the foundations, evidence, mechanisms, and applications of evolutionary Biology. The course begins with the history of evolutionary thought, including fixed species, deep time, early scientific clues, Darwin and Wallace, descent with modification, population variation, and heredity.

Students then examine the major evidence for evolution, including transitional fossils, comparative anatomy, vestigial traits, embryological patterns, biogeography, DNA, proteins, and evolutionary trees. Each topic shows how independent evidence from across Biology supports the same powerful explanation for the diversity and relatedness of life.

The course also explains the mechanisms that produce evolutionary change. Students will study mutation and recombination as sources of variation, natural selection as a process that shapes adaptation, genetic drift and founder effects, gene flow, population structure, sexual selection, and reproductive success.

By the end of the course, students will be able to explain how lineages split, how macroevolution and extinction shape life over time, how human evolution is studied through evidence, and how evolution can be observed today in resistance, disease, and rapid biological change. After completing this Biology course, students will think more scientifically about life’s diversity and understand why evolution is one of the central organizing ideas in modern Biology.

Course Lessons

Full lesson breakdown

Lessons are organized by topic area and each includes descriptive copy for search visibility and student clarity.

Foundations of Evolutionary Thinking

4 lessons

This lesson explains why evolution is treated in biology as a scientific explanation : it organizes evidence, makes testable predictions, and can be revised when new evidence appears. Students disting…

Lesson 2: Before Darwin: Fixed Species, Deep Time, and Early Clues

20 min
This lesson sets the stage for Darwin by examining the ideas that made evolutionary thinking difficult, and the observations that slowly made it unavoidable. Students will see how the doctrine of fixe…

Lesson 3: Darwin, Wallace, and Descent with Modification

21 min
This lesson introduces the historical and conceptual foundations of evolutionary thinking through Charles Darwin, Alfred Russel Wallace, and the idea Darwin called descent with modification . It expla…

Lesson 4: Populations, Variation, and Heredity

19 min
This lesson introduces the population-level view that makes evolutionary biology work. Instead of treating evolution as a story about individual organisms changing during their lifetimes, it explains …

Evidence for Evolution

6 lessons

Lesson 5: The Fossil Record and Transitional Forms

22 min
This lesson explains how fossils provide historical evidence for evolution and how scientists interpret transitional forms. Students learn what the fossil record can show, why it is incomplete, and wh…

Lesson 6: Comparative Anatomy: Homology, Analogy, and Vestigial Traits

20 min
This lesson explains how comparative anatomy provides evidence for evolution by distinguishing homologous , analogous , and vestigial traits. Students learn how shared body plans can reveal common anc…

Lesson 7: Embryology and Developmental Evidence

18 min
This lesson examines embryology and developmental biology as evidence for evolution. It explains why embryos of related organisms often share early structures, how those structures are modified during…

Lesson 8: Biogeography: Evolution Across Space and Time

21 min
This lesson shows how the geographic distribution of organisms provides strong evidence for evolution. Biogeography makes sense when species are understood as descendants of earlier populations that m…

Lesson 9: DNA, Proteins, and Molecular Evidence

23 min
This lesson explains how DNA and proteins provide independent, testable evidence for common ancestry. Students examine why shared genetic features, sequence similarities, protein comparisons, pseudoge…

Lesson 10: Building Evolutionary Trees

22 min
In this lesson, students learn how evolutionary trees, or phylogenies, represent hypotheses about relationships among organisms. The lesson focuses on how trees are built from shared derived traits, D…

Mechanisms of Evolutionary Change

5 lessons

Lesson 11: Mutation and Recombination: Sources of New Variation

20 min
This lesson explains how new genetic variation enters populations through mutation and recombination. Mutation changes DNA sequence and creates new alleles, while recombination reshuffles existing all…

Lesson 12: Natural Selection: Adaptation Without Intent

23 min
This lesson explains natural selection as a non-random mechanism of evolutionary change that produces adaptations without foresight, planning, or intent. Students learn the necessary conditions for na…

Lesson 13: Genetic Drift and Founder Effects

19 min
This lesson explains genetic drift : evolutionary change caused by random shifts in allele frequencies from one generation to the next. Unlike natural selection, drift does not favor alleles because t…

Lesson 14: Gene Flow, Migration, and Population Structure

18 min
This lesson explains how gene flow moves alleles among populations through migration, dispersal, mating, and the movement of gametes such as pollen. Students will learn why gene flow is a mechanism of…

Lesson 15: Sexual Selection and Reproductive Success

20 min
Sexual selection is a form of natural selection that acts on traits affecting mating success and reproductive access. It explains why some traits evolve even when they seem costly for survival, such a…

Patterns and Applications

5 lessons

Lesson 16: Speciation: How Lineages Split

23 min
This lesson explains speciation : the evolutionary process by which one lineage splits into two or more independently evolving lineages. It focuses on how reproductive isolation develops, why geograph…

Lesson 17: Macroevolution, Extinction, and Major Transitions

22 min
This lesson explains macroevolution as evolution above the level of populations: the origin of new species, long-term trends, adaptive radiations, extinctions, and major transitions in body plans and …

Lesson 18: Human Evolution in the Evidence

24 min
This lesson examines human evolution as a case study in how multiple independent lines of evidence support evolutionary history. It focuses on fossils, comparative anatomy, genetics, biogeography, and…

Lesson 19: Evolution in Real Time: Resistance, Disease, and Rapid Change

21 min
This lesson examines evolution as an observable process happening on human timescales. Instead of treating evolution only as deep history, it focuses on cases where populations change measurably over …

Lesson 20: Using Evolutionary Thinking Today

18 min
This lesson shows how evolutionary thinking is used in present-day biology, medicine, agriculture, conservation, and public decision-making. Rather than treating evolution as only a history of life, t…
About Your Instructor
Professor Elizabeth Evans

Professor Elizabeth Evans

Professor Elizabeth Evans guides this AI-built Virversity course with a clear, practical teaching style.