Last Minute Lecture

The Evolution of Populations — Microevolution, Hardy-Weinberg, and Selection Explained | Chapter 23 of Campbell Biology Welcome to Last Minute Lecture! This post breaks down microevolution and population genetics, as covered in Chapter 23 of Campbell Biology . Learn how allele frequencies change over generations, how genetic drift and gene flow operate, and how Hardy-Weinberg equilibrium serves as a benchmark for evolution in real-world populations. Watch the full video summary below and subscribe for more clear, chapter-by-chapter guides to evolutionary biology! Introduction: Microevolution in Populations Evolution acts on populations, not individuals. Microevolution describes the change in allele frequencies within a population from one generation to the next, driven by mechanisms such as natural selection, genetic drift, and gene flow. Classic studies, such as the finches of the Galápagos Islands, illustrate how environmental changes and heritable traits (like beak size)...

Darwinian Evolution — Descent with Modification, Natural Selection, and Evidence Explained | Chapter 22 of Campbell Biology Welcome to Last Minute Lecture! This post explores Darwin’s theory of evolution by natural selection as presented in Chapter 22 of Campbell Biology . Uncover the revolutionary ideas that forever changed biology, from descent with modification to the vast evidence supporting evolution. Watch the full video summary below and subscribe for more chapter-by-chapter insights into evolution and the history of life! Introduction: The Darwinian Revolution Charles Darwin’s ideas challenged centuries of belief in a static, young Earth and unchanging species. Influenced by his voyage on the HMS Beagle, the geological work of Hutton and Lyell, and observations of artificial selection, Darwin published On the Origin of Species in 1859, introducing descent with modification as the basis for evolution. Descent with Modification and Natural Selection Unity and D...

Evolution, Key Themes, and Scientific Inquiry in Biology — Campbell Biology Chapter 1 Summary Welcome to Last Minute Lecture! This post explores the foundational ideas of biology as presented in Chapter 1 of Campbell Biology . Whether you're a student preparing for exams or simply curious about the science of life, this summary offers a clear, concise look at evolution, biology's key themes, and the scientific method. Don’t miss the full podcast-style summary in the video below—watch and subscribe for more chapter-by-chapter guides! Introduction: The Study of Life Biology is the scientific study of life, encompassing everything from microscopic cells to the vast biosphere. Chapter 1 of Campbell Biology sets the stage by highlighting what defines living organisms, their organization, and the unifying role of evolution. Understanding these basics is essential for studying advanced biological concepts and appreciating the diversity of life on Earth. Hierarchical Org...