WAYS BACTERIA ARE BENEFICIAL

bewilderedvoyageΒιοτεχνολογία

12 Δεκ 2012 (πριν από 4 χρόνια και 9 μήνες)

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WAYS BACTERIA ARE BENEFICIAL

Natural flora in body
-
Inhibit growth of pathogenic bacteria

Symbionts in digestive tract of
animals


Make v
itamins
-

K and B
12


Digest cellulose

Make foods we like


Yogurt,
cheese,
pickles, sauerkraut,
kimchi, wine

Important decomposers in ecosystems


-
recycle nutrients in biogeochemical cycles

Bioremediation


clean
-
up of oil spills, toxic waste

Nitrogen fixation
-


Change N
2

gas into form usable by living things

Make medicine
-


Geneti
cally engineered bacteria make human insulin, growth hormone, etc


Source of antibiotics

Source of Taq polymerase for PCR (genetic engineering)

Ancestors of mitochondria/chloroplasts


-
ENDOSYMBIOTIC THEORY