chapter 1 outline

the scope of microbiology

1. Organisms too small to be seen without magnification

small organisms

1. Bacteria, viruses, fungi, protozoa, helminths, and prions

2. Microbes are both easy and difficult to study

Microbiology sample of fields of study

Agricultural, epidemiology, public health, immunology, industrial , agricultural, environmental and so on.

The impact of microbes on earth : small organisms with big effect

1. Bacteria and archaea  

   1. no nucleus

2. Eukaryotic cells: 1 billion years later 

   1. has a true nucleus

3. Microbes are ubiquitous and have evolved 

   1. is a bacteria

   2. found in curst of earth, body of plants and animals, polar ice caps, oceans

4. Microbes participate in processes (decomposition, photosynthesis, etc.)

microbes participate in process

decomposition, photosynthesis

human use of microorganisms

historic use in food formations