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Chapter 19 Terms - B iology 1421 Chapter 19 Key Terms A...

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Biology 1421 Chapter 19 Key Terms Anaerobe: an organism whose respiration does not require oxygen. Bacteriophage: a virus specialized to attack bacteria. Conjunction: in prokaryotes, the transfer of DNA from one cell to another via a temporary connection; in single-celled eukaryotes, the mutual exchange of genetic material between two temporarily joined cells. Endospore: a protective resting structure of some rod-shaped bacteria that withstands unfavorable environmental conditions. Flagellum: a long, hair-like extension of the plasma membrane; in eukaryotic cells, it contains microtubules arranged in 9+2 pattern. The movement of flagella propel some cells through fluids. Gram Stain: a stain that is selectively taken up by the cell walls or certain types of bacteria (gram-positive bacteria) and rejected by the cell walls of others (gram-negative bacteria); used to distinguish bacteria on the basis of their cell wall construction.
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