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Prokaryote

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A unicellular organism that lacks a nucleus and membrane-bound organelles.

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Eukaryote

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An organism whose cells contain a nucleus and other organelles enclosed within membranes.

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Autotroph

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An organism that produces its own food from inorganic substances, using light or chemical energy.

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Heterotroph

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An organism that cannot produce its own food and instead consumes other organisms.

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Unicellular

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Consisting of a single cell.

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Multicellular

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Consisting of multiple cells.

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Sexual reproduction

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A type of reproduction that involves the combination of genetic material from two parents.

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Asexual reproduction

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A type of reproduction that does not involve the fusion of gametes and produces offspring genetically identical to the parent.

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Taxonomy

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The science of classifying organisms.

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Classification

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The process of arranging organisms into groups based on similarities.