| Characteristics | Virus | Cell | 
|---|---|---|
| Structure | DNA or RNA in capsid, some in envelop | Cell membrane, cytoplasm;eucaryotes also contain nucleus and many organellos. | 
| Reproduction | Only within a host cell | Independent cell division either asexually or sexually. | 
| Genetic Code | DNA or RNA | DNA | 
| Growth and Development | No | Yes; in multicellular organisms cells increase in number and differenciate. | 
| Obtain and use Energy | No | Yes | 
| Response to Environment | No | Yes | 
| Change Over Time | No | Yes |