Virus
Virus explained in an easy to understand way:
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.
Practice Version
Virus: Nonliving particle of DNA or RNA within a protein coat, it infects cells to reproduce. Virus. A virus is a tiny germ that needs to enter living cells to multiply and spread.