Viruses

The first subject is viruses. There are [|millions of viruses] on Earth. All viruses have only one life function. To infect a host and reproduse. Viruses can only reproduc inside a living cell. If you look at the right you can see thres types of viruses.

. Below are vocabulary terms that deal with viruses.

__capsid-__ the protien coat surrounding the head.

__tail__- used to move around. __collar__- between the head and tail.

__tail fibers__- used to attach to cells.

__vaccines__- protection against some viral dieases.

__antibodics__- natural defense to fight off viruses.

__lyic cycle__- the process in which a virus destroys a bacteria. __lyiceinmone cycle__- process in which a virus splitts a bacteria