They are made from Genetic material and protected by a layer of proteins called capsid.

Bacteria are single-celled that are very small .Bacteria that make up sick are called pathogenic bacteria and cause diseases at plant , people and animals.

Protozoa are parasites and live inside other bodies and its classification is : Ameoba , Euglena , Paramecium .

Micro-organisms is a living organisms so small that we can see only with microscope.

If we get in touch with harmful bacteria they reproduce in our body and make us sick.

At colder temperature decomposing will be less active and if the temperature raise the decomposers become more active and the rate increases and decay stop.

Algae are living organisms , are found all over the world , can be green , blue , red and brown. They are to big to (200 feet).

Fungi are living organisms that are classified to their own kingdom .

Decomposition is the break down of dead matter.

Nutrition, reproduction , growth , movement , sensitivity , excretion and respiration.

They are important because they play an important role at the fertility of soil .

Types of bacteria are aerobic , anaerobes and faculative anaerobes .

Spores are reproductive cells capable of developing into a new individual without combining with another reproductive cell.