Virus

Real World Example

Imagine you're hosting a party, and an uninvited guest sneaks in. This is similar to how a virus operates, as it needs to infiltrate a host cell to replicate itself. Just like the uninvited guest who uses your party supplies to enjoy themselves, a virus is a nonliving particle of DNA or RNA wrapped in a protein coat that hijacks a cell's machinery to reproduce, using the cell’s resources much like the guest uses yours.