Friday, 7 December 2012

4.  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



Wednesday, 21 November 2012

3. Fungi

Fungi is a group of simple plants that have no chlorophyll .There are some species of fungi that are single celled organisms, and there are other kinds of fungi that are multi-cellular organisms. Fungi are made up of filaments called hyphe that are stacked together from end to end.   

Some kinds of fungi live on land and other types of fungi live in water environments. Since fungi has no chlorophyll, it can not make its own food. Some types of fungi lives off of other organisms and are parasites, but other fungi species feed off of dead and decaying matter. A third kind of fungi lives with other organisms and neither the fungi or the organism is hurt. This kind of relationship is called positive symbiosis .

Fungi can be found on mouldy bread, rotten food, trees and forest floors. For examples ...
Jelly Fungi
Fungi on the tree

Mouldy bread
Fungi on the rotten food

Mushroom-types of fungi
Mouldy bread under microscope

Tinea Foot : 

A group of fungi

Sunday, 11 November 2012

2. Protozoa
The word "protozoa" mean "little". The most abundant animals in the world are protozoa. Their role in ecology is a very important one. Protozoa also include many parasites. Protozoa have one cell, there are more than 50,000 species in the protozoa group. Most protozoa are found mainly in ponds, soil, lakes and rivers. Some of them eat other microorganisms as food.

There are an example of protozoas
protozoa under microscope
protozoa in the soil

protozoa in the water

Tissue associated by protozoa