| A | B |
|---|
| The release of energy from food is called___ | respiration |
| Vertebrates that feed molk to their young are called___ | mammals |
| All of the ____ have a backbone. | vertebrates |
| The getting rid of waste is called_____ | excretion |
| _____ is the process by which plants make their food. | photosynthesis |
| The ___ all have dry, scaly skin. | reptiles |
| A key is a set of simple ___ to identify organisms. | questions |
| ___is needed to see the smallest animals | microscope |
