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The page begins by explaining the defining characteristics of eukaryotes, such as their genetic material being organized into multiple linear chromosomes within a nucleus. It also highlights the presence of membrane-bound organelles like mitochondria, Golgi apparatus, and endoplasmic reticulum, which are responsible for various cellular functions. The page then delves into the evolutionary history of eukaryotes and their possible origins from prokaryotic ancestors. It explores the endosymbiotic theory, which suggests that certain organelles, such as mitochondria and plastids, were once free-living prokaryotes that were engulfed by ancestral eukaryotic cells, eventually forming a symbiotic relationship. The diversity of eukaryotes is extensively covered, with the page describing the various kingdoms and supergroups within this domain. These include Protista, Fungi, Plantae, and Animalia, among others. Each kingdom is briefly explored, highlighting their unique characteristics and evolutionary relationships. The page also covers various aspects of eukaryotic cell structure and function, including the plasma membrane, cytoskeleton, and cellular processes such as metabolism, reproduction, and cell signaling. The role of eukaryotes in ecological systems, including their importance as primary producers, herbivores, and predators, is also discussed. Furthermore, the page touches upon some significant eukaryotic diseases, such as malaria and toxoplasmosis, as well as the use of eukaryotic model organisms in scientific research, such as yeast, fruit flies, and mice. Throughout the article, references and links to additional resources enable readers to explore specific topics in greater depth. The page provides a comprehensive introduction to the domain of eukaryotes, serving as a valuable resource for anyone seeking information on this fundamental group of organisms.