Bacteria

SUMMARY

Bacteria are unicellular microorganisms. they come in different shapes and sizes.Bacteria are ubiquitous in every habitat on earth, growing in soil, acidic hot springs, radioactive waste, sea water, and deep in the earth's crust. there are typically 40 million bacterial cells in a gram of soilamn a million bacterial cells in a millilitre of fresh water.

Bacteria was first observed by Anton Van Leeuwenhoek in 1676, using a single-lens microscope of his own design he called them "animalcules" and published his observations in a series of letters to the royal society. there approximately ten times as many bacterial cells as human cells in the human body with a large numbers of bacteria on the skin and in the digestive tract. although the vast majority of these bacteria are rendered harmless.

The most common fatal bacteria diseases are respiratory infections, with tuberculosis alone killing about 2 million people a year, mostly in sub-Saharan Africa. in developed countries, antibiotics are used to treat bacterial infections and in various resistance is becoming common.

MAJOR GROUPS

Eubacteria-

Archeabacteria

LOCOMOTION

Flagella

Spirochete Flagella

Non-motile

REPRODUCTION

Binary fission

End-spores

Conjugation

SHAPES AND STRUCTURES

BENEFITS




PROBLEMS



(PICS)