| A | B |
| ancestor | a person from whom one is descended |
| carnivore | a flesh-eating animal |
| comprehend | to understand |
| duration | the time during which something lasts or continues |
| evident | easy to see and understand, obvious, clear |
| extinct | no longer exisiting or living |
| ferocious | savage, fierce |
| gigantic | very large, like a giant in size |
| obscure | to cover up or keep from being seen |
| option | choice, or something available as a choice |
| premature | too early, happening or arriving before the proper tim |
| preserve | to save, to keep from harm, to protect |
| prey | an animal that is hunted for food |
| puny | weak, lacking in size |
| survive | to stay alive where there is a chance of dying or being killed |