| A | B |
|---|
| Cold-blooded and lay jelly eggs | amphibians |
| hard bones and has dry skin | reptiles |
| warm-blooded with fur | mammals |
| hollow bones and warm-blooded | birds |
| lay soft eggs without hard outer shell and have gills | fish |
| lay eggs and are cold-blooded | reptiles |
| bony or have cartilage and cold-blooded | fish |
| moist and mucus-like body covering with hard bones | amphibians |
| feathers and lay eggs | birds |
| have live young and have hard bones | mammals |
