Friday, 7 December 2012


4.  Virus
 
Virus
Virus is the tiniest microorganism. It can be found living in some bacteria, fungi, protozoa, animals, plants and humans.


Viruses are not alive, so they do not have a need for food like living organisms. Viruses do not have an organized cell structure. They are so light that they can float in the air or water, be passed on to other organisms if touched, and fit anywhere. The virus injects its own DNA structure into healthy cells where new virus cells grow.

There are an example of viruses :
Flu Virus

Virus in blood











HIV Virus

HIV Virus