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    GlossaryEukaryote

    cells with a nucleus and membrane-bound organelles

    A eukaryote is an organism whose cells contain a nucleus enclosed within a membrane, along with other specialized structures called organelles, such as mitochondria and the endoplasmic reticulum. This distinguishes them from prokaryotes, like bacteria, which lack a membrane-bound nucleus. Eukaryotes include all plants, animals, fungi, and many microorganisms, making them essential to understanding complex life forms and biological processes.

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