| A | B |
|---|
| eukaryote | an organism composed of one or more cells containing a nucleus and membrane-bound organelles |
| archaea | the species thought to be more ancient than bacteria and yet more closely related to eukaryote ancestors |
| protist | eukaryotic organisms that can be unicellular, colonial, or multicellular |
| fungus | unicellular or multicellular eukaryote that absorbs nutrients from organic materials in its environment |
| peptidoglycan | a polymer that contains two kinds of sugar that alternate in the chain |
| extremophiles | archaea that are able to live in extreme environments |
| eukaryotic cells | cells with a membrane-bound nucleus and other membrane-bound organelles |
| chitin | a rigid polymer that provides structural support |
| hyphae | threadlike filaments that are responsible for the fungus’s growth, feeding, and reproduction |
| parasites | organisms that grow and feed on other organisms |
| saprobes | organisms that get their nourishment from dead or decaying organic matter |
| lichens | organisms that get their food from the algae that live among their hyphae |
