Savvas Life Science Topic 1 L3-4

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virus

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host

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organism that provides a source of energy or a suitable environment for a virus to reproduce

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vaccine

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substance that can trigger the body to produce chemicals that destroy viruses

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bacteria

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single celled organism that lacks a nucleus

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protists

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eukaryotic organisms that cannot be classified as plants, animals or fungi

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pathogen

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a disease causing micro-organism or virus

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parasite

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tissue

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a group of cells that perform similar functions

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vascular plant

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non vascular plant

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low growing plant that lacks vascular tissue for transporting materials