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micro-organism
a very small living organism which cannot be seen with the nake eye
not all micro-organisms are harmful
pathogen
a disease causing micro-organism
examples include:bacteria, viruses, fungi, protisis
pathogens are spread by…
Air, Direct Contact, Animals+Insects (Vectors), Water, Formites, Lifestyle factors (etc hygiene)
Spread of pathogens prevented by…
-hyginene (hand washing etc)
-isolating people with the disease
-destroying animals that carry and spread the disease
-vaccination
Binary Fission
Bacteria reproduce by simple binary fission - splits cell into 2 identical daughter cells
can divide up to every 20 mins in right conditions
growth rate impacted by: temperature, nutrients, oxgyen levels, pH
steps to binary fission
DNA replication
Elongation of cell
DNA moves to opposite ends of the cell
septum/ cell membrane formation in the middle
Splits into two daughter cells.
