Last Minute Lecture

A Tour of the Cell — Prokaryotic vs. Eukaryotic Cells, Organelles, and Cell Structure Explained Welcome to Last Minute Lecture! In this post, we take you through the intricate world of the cell, the fundamental unit of life, as detailed in Chapter 6 of Campbell Biology . Discover how cells are studied, the differences between prokaryotic and eukaryotic cells, and the functions of key organelles that keep cells—and life—running smoothly. Watch the full video summary below and subscribe for more clear science breakdowns! Introduction: The Cell as Life’s Building Block Cells are the smallest units that can carry out all life’s functions. Chapter 6 of Campbell Biology explains how scientists use light and electron microscopy to study cells and how cell fractionation helps reveal the structures and functions of cell components. Understanding cell structure is foundational to all of biology. Studying Cells: Microscopy and Cell Fractionation Light Microscopy (LM): Uses vis...

Imperfections and Composition of Solids — Chapter 4 Summary from Callister’s Materials Science and Engineering Chapter 4 of Materials Science and Engineering: An Introduction by William D. Callister, Jr. and David G. Rethwisch reveals that imperfections are not flaws but fundamental features that define how materials behave. This summary explores the critical role of crystalline defects, types of imperfections, alloy composition, and modern microscopic analysis—essential concepts for anyone interested in materials engineering or physical science. Watch the full podcast-style summary below, and don’t forget to subscribe to Last Minute Lecture for expertly explained chapter guides on major STEM textbooks! Introduction: The Reality of Imperfect Crystals No crystalline solid is ever perfect. Every material contains defects—vacancies, dislocations, and interfacial boundaries—that influence properties such as strength, conductivity, and chemical reactivity. In fact, certain ...