The amazing diversity of fungi, protists, and algae is, in many instances, difficult to detect with the naked eye. Readers will learn all about the internal structures, genetic material, biochemical processes, and taxonomy that define these varied, small yet complex eukaryotic organisms. This volume demonstrates the many important functions that fungi, protists, and algae serve in the natural world, as well as in the lives of humans through various foods, medicines, and biotechnologies.