Final answer:
Viroids are small, single-stranded, circular RNA particles that infect plants. They reproduce only within a host cell and do not produce any proteins. Viroids affect only plants, and no human diseases caused by viroids have been identified so far.
Step-by-step explanation:
Viroids are small, single-stranded, circular RNA particles that infect plants. Viroids are small, single-stranded, circular RNA particles that infect plants. They reproduce only within a host cell and do not produce any proteins. Viroids affect only plants, and no human diseases caused by viroids have been identified so far.
They are simpler than viruses and do not have a capsid or outer envelope. Viroids reproduce only within a host cell and do not produce any proteins. They affect only plants, and no human diseases caused by viroids have been identified so far.