**Campbell Biology** delivers a proven, current, absorbing experience that guides you to a true understanding of biology. The authors carry on Neil Campbell's original vision: to provide the tools, visuals, resources, and activities that will help you succeed in your general biology course. The **13th Edition** offers new Practice Applying Your Learning question sets in each unit. New and updated content includes updates in gene editing and stem cell research; artificial intelligence and its role in bioinformatics and medical diagnosis; global climate and population changes; SARS-CoV-2 and the COVID-19 pandemic, and expanded discussions of emerging and zoonotic pathogens; and much more.