* Viruses: Viruses are tiny infectious agents that are not considered living organisms. They are essentially genetic material (DNA or RNA) encased in a protein coat. They are measured in nanometers (nm), with most ranging from 20 to 400 nm in size.
* Organelles: Organelles are specialized structures within cells that carry out specific functions. They are much larger than viruses, typically measured in micrometers (µm). For example, a mitochondrion, which is responsible for cellular respiration, can be 0.5 to 10 µm in size.
Think of it this way:
* Virus: Imagine a tiny speck of dust.
* Organelle: Imagine a large, complex machine like a car.
Since 1 µm is equal to 1000 nm, a virus is 1000 times smaller than a typical organelle.
