| A | B |
| phylum | called a division in the Plantae kingdom |
| Animalia | eukaryotic, multicellular heterotrophs |
| Protista | eukaryotic, single celled organisms |
| Fungi | eukaryotic; single celled and multicellular heterotrophs that secrete enzymes to absorb food |
| Plantae | eukaryotic, multicellular photosynthetic |
| Eubacteria | prokaryotic; cell walls contain peptidoglycan |
| Archaebacteria | prokaryotic cells including methanogens and thermophiles |
| binomial | "two part" name such as "Homo sapiens" |
| polynomial | long, cumbersome name with many parts |
| Latin | language of classification |
| Linnaeus | developed the first classification scheme still used today |
| genus | part of name that is abbreviated and capitalized |
| species | a specific "kind" of organism |
| multicellularity | complex differentiation depends on this |
| homologous | characteristics that arise from a common evolutionary descent |
| analogous | characteristics with a common function, but not derived from a common evolutionary descent |
| cladogram | family tree |
| sporic meosis | typical life cycle of plants |
| mitachondria | thought to have arisen from symbiotic eubacteria |
| chloroplasts | thought to have arisen from symbiotic cyanobacteria |
| 10 million | estimated eukaryotic species on earth |
| 1.4 million | number of species currently identified |
| 6-7 million | estimated total number of tropical species |
| ancestral eukaryotic cell | probably an archaebacterium |
| 2 billion | years ago that bacteria ruled the earth |
| sexuality | interchange of genetic material by meosis |
| zygotic meosis | typical life cycle of algae |
| gametic meosis | typical life cycle of humans* *except in remote areas of the globe..like... |
| morphology | appearance |
| prions | proteinaceous infectious particles with no nucleic acid |
| Prusiner | received Noble Prize for work with prion diseases |