Bacteria, Protist and Virus Vocabulary

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The protein shell that surrounds a virus.

An organelle of the protist euglena that is sensitive to light.

A whip-like structure on unicellular organisms that aids with movement.

A particle consisting of DNA encased in a protein coat that must inject its DNA into a living cell in order to reproduce.

Either unicellular or multi-cellular organism that contains membrane-bound organelles and genetic material within a nucleus.

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

An extension of the cytoplasm used for movement in some organisms.

A short hair-like appendage used by microorganisms for motion.