| A | B |
| Invertebrate | no nerve cord |
| Vertebrate | nerve cord protected by bone |
| Invertebrate chordate | nerve cord not protected by bone |
| Swim Bladder | structure used in fish that help keep depth |
| Monotreme | mammals that lay eggs |
| Marsupial | mammals that develop young in pouches |
| Placental | mammals that develop young in an uterus |
| Filter feeder | pick food out of water that passes through/by them |
| Thermoregulation | maintaining of internal body temperature |
| Pathogen | any organism that causes disease |
| Virus | genetic code surrounded by a protein coat |
| Bacteria | prokaryote |
| Lyctic Cycle | you feel sick soon after you are infected |
| Lysogeneic Cycle | virus stays dormant for longer periods of time |