| A | B |
| chloroplast | the site of photosynthesis |
| flagella | hair like structure(s) made up of microtubules that function for motility |
| host | an organism that supports a parasite |
| parasite | an organism that obtains its nutrition at the expense of another |
| aerobic | an organism that requires oxygen |
| anaerobic | an organism that lives in the absence of oxygen and dies when exposed to air |
| autotroph | an organism that synthesizes organic molecules from inorganic substances |
| heterotroph | an organism that cannot make its own food |
| pili or pilus | appendage(s) bacteria use to attach to objects |
| capsule | a protective layer of slime around the cell wall |
| envelope | the tough coating around an endospore which enables the DNA and cytoplasm to lie dormant for many years |
| Staphylococci | clusters of spherical bacterial cells |
| Streptococci | filaments of spherical bacterial cells |
| saprophyte | an organism that feeds on dead organic material |
| Pasteurization | the process of heating a substance to kill microorganisms developed by Louis Pasteur |
| tail fibers | the "legs" of a virus that attach to its host cell, they contain proteins that have an affinity to the host cell wall |
| penicillin | a product of the fungus penicillium, this chemical inhibits the growth of many Gram-positive bacteria |
| agar | nutrient medium for growing cultures made from seaweed |
| bacillus | rod shaped bacteria |
| binary fission | reproducing by splitting in two; an asexual, miotic division of unicellular organisms that roduces identical offspring |
| virus | a biological particle composed of genetic material and protien that is not usually considered to be a living organism |
| coccus | spherical shaped bacteria |
| colony | a group of unicellular organisms that live together in closely connected groups |
| culturing | the growing of a colony of cells in a nutrient rich medium in ambient conditions |
| DNA, RNA | the genetic material that contains and transmits information on cell growth, regulation and characteristic features |
| photosynthetic | an organism that makes its food by converting sunlight into chemical energy, glucose |
| spirillium | a spiral shaped bacteria |
| staining | the use of dyes to color the structures of bacteria of other organisms so they are more visible, crystal violet colors the "Gram-positive" bacteria |