Animal Diversity — Origins, Body Plans, and Evolutionary History Explained | Chapter 32 of Campbell Biology
Animal Diversity — Origins, Body Plans, and Evolutionary History Explained | Chapter 32 of Campbell Biology Animals are among the most evolutionarily diverse and complex groups on Earth, with specialized tissues, varied body plans, and remarkable evolutionary innovations. Chapter 32 of Campbell Biology unpacks the origins, phylogeny, and defining characteristics of the animal kingdom. Whether you’re preparing for a zoology exam or want a deeper understanding of evolutionary biology, this podcast summary and guide will clarify essential concepts and key terms. Watch the full podcast summary below, then dive into this expanded breakdown for major themes, historical context, and glossary definitions. Introduction: What Makes an Animal? Animals are multicellular, heterotrophic organisms that lack cell walls and possess specialized tissues such as muscle and nerve tissue. Unique features—like movement, sensory processing, and complex digestion—are hallmarks of animal life. C...