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Jack mitchell

on 6 October 2010

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Transcript of BACTERIA

bacteria aRCHEABARTERIA Archaebacteria can be divided into three groups.

Archaebacteria reproduce asexually by a process called binary fission. In binary fission, the bacterias DNA replicates and the cell splits in half.

Archeabacteria can only live in areas WITHOUT oxygen

Archeabacteria can live in the harshest climates Eubarteria Eubarteria are 3.5 billion years old
They are prokaryotic cells.
Eubacteria can eat others or make thier own food
They can move.
Some are pathogens. Bacteria similatities all are prokaryotic
all produce asexually
All Bacteria don't have a nucleus
All Bacteria have DNA 22-26 Bacteria Reproduction
Bacteria reprodce by bianary fission.
After bianary fission the 2 cells are identical.
Bacteria grow to a fixed size and then reproduce through binary fission. Common ways to move
The most common occurs by the use of appendages called flagella.
they are self propelled
Bacteria grow to a fixed size and then reproduce through binary fission.
some can reproduce every 9.8 minutes. bacteria food production

Some bacteria are autotrophs who make their own food with their enviroment around them and the sun's energy (photosythesis).
some are heterotrophs can't make their own food so they eat autotrophs and other heterotrophs. How bacteria are helpful
they help produce diary products.
they keep vegetables fresher.
The cycle of nitrogen is another important activity of bacteria.
the earth would probably still be the barren wastel like it was was 4.6 billion years ago if bacteria had never showed up.
almost 99 percent of bacteria are helpfull. harmful bacteria
•Certain bacteria act as pathogens and cause tetanus, typhoid fever, pneumonia, syphilis, cholera, food-borne illness and tuberculosis.
Bacteria are responsible for 90 of all hospitalized infections in developing countries.
most people think that bacteria are more harmfull than helpfull.
Plant disease caused by bacterial plant pathogens is a major problem worldwide for agriculture. bacteria facts
People have more bacterial cells in their bodies than human cells and more than there are people on the planet.
Bacteria produce oxygen perhaps even as much as half of the oxygen in the atmosphere.
The record for underground living goes to a species of Chemolithotrophic bacteria found in Basalt deposits 1500m underground in solid rock.
Bacteria are used to make wine as well as vinegar.
Dead or weakened bacteria and viruses are used for making helpful vaccines.
on average you swallow 100 billion bacteria a day.
Different bacteria can live at a huge range of temperatures, from ice to hot springs, and can even live in radioactive waste.
Bacteria can help clean up oil spills.
Bacteria are used in making cheese, yoghurt and sourdough bread. summary

most people think that all bacteria are harmfull, however most are not. bacteria reproduce asexually and there is 2 types of way to get thier food. they move by propelling themselves and act as pathogens. all are prokaryotic and all dont have a nuclues.


THE end
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