| A | B |
|---|
| classification | grouping things by using a set of rules |
| kingdom | the largest group which living things are classified |
| genus | the second smallest group in classificaton |
| species | the smallest group in classification |
| vertebrates | animals that have backbones |
| mammals | have hair and produce milk for babies |
| reptiles | have dry, scaly skin |
| amphibians | have moist skin and no scales |
| invertebrates | animals without backbones |
| arthropods | are invertebrates with legs that have many joints |
| vascular plants | have tubes in roots, stems and leaves |
| nonvascular plants | no tubes; water must soak into the plant |
