Across
- 2. membrane where virus ateches us
- 3. it is arround nucleic acid and protein coat in the upper part
- 6. is the midle part of a virus
- 7. Viruses consist of a strand of nucleic acid surrounded by a protective protein coat
- 8. envelope some viruses, such as influenza,
Down
- 1. Viruses that infect bacteria
- 4. the viruses do asexualy
- 5. parasite that can only reproduce by invading the cells of other living things
- 9. are very comun and are serious diseases