| A | B |
|---|
| eubacteria | "true bacteria", most common bacteria today |
| archaebacteria | "ancient bacteria", live in extreme harsh environments |
| cyanobacteria | photosynthetic bacteria, important for the production of oxygen |
| multicellular | made of more than one cell |
| phyla (phylum, singular) | the major division group of kingdoms |
| mass extinctions | periods of time when many speices disappeared in a short period of time |
| ozone | proctection molecule in the atmosphere that absorbs UV radiation |
| mycorrhize | fungus and root partnership that allows plants to absorb minerals and water more efficiently |
| mutualism | a symbiotic relationship between organisms in which both organisms benefit |
| continental drift | the movement of land masses |
| notochord | flexible rod of cartilage |
| vertebrates | chordates that have a backbone made of bone |
| endotherms | animals able to regulate their temperature internally |
| ectotherms | animals that have difficulty regulating their temperature and must absorb heat from thier surroundings |
| plants | photosynthetic, multicellular organisms that first colonized land |
| fungi | organisms that get their nutrition from absorbing |
| Miller and Urey | tried to determine whether organic molecules could form under conditions thought to have existed on early Earth |
| Oparine and Haldane | proposed that early Earth's atmosphere lacked oxygen |
| RNA | thought to be the first genetic molecule |
| eukaryote | cell that has a nucleus and membrane bound organelles |
| jaws | what the first fish found in the fossil record lacked |
| cartilage | the material that shark skeletons are made of |
| amphibians | ectothermic animals adapted to life on land with lungs and legs but must reproduce in moist environments |
| reptiles | ectothermic animals with a three chambered heart, leathery,watertight eggs and scaly skin |
| mammals | endothermic animals which have a four chambered heart, hair, and produce milk |
| birds | endothermic animals that have a four chambered heart, have shelled eggs |
| fish | ectothermic animals which use gills to breath, have a two chambered heart |
