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15 Cards in this Set
- Front
- Back
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Mutualism |
co-dependency- mutal benefit to both partners. Depend on each other |
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Cooperations |
mutaual benefit- when right conditions, can benefit from each other, but don't need each other |
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Commensalism |
one organism benefits, and other is not harmed or helped |
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Antagonism |
amensalism- one organsims produces compound that harms the other |
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competition |
two organsims are tyring to use same resource- some advantage -one gets everything, or they must share resource |
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pathogen |
organism causes disesase in host |
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biofilms |
slime enclosed cummunitiies of microbes attached to surface -
can form on any conditioned surface
group of bacteria encoled in adhesive, self-produced matrix composed of extracellular polymeric substances (EPS) |
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why do biofilms grow on surfaces |
1. offer constant access to nutrients 2. protection from predators 3. staying in favorable habitat rather than being washed away |
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how do biofilms form? |
single cells attached form clusters called microcolonies |
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types of surfaces biofilms attach to |
organic, inorganic, other organisms. |
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what is a habitat for a bacteria? |
a microenvironement that can have large changes in chemistry over very small distances
ex. oxygen across microenvironment |
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how does bacteria get nutrients in microenvironment |
nutrient access limited by diffusion |
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lifestyle of microbes in non-lab environments? why? |
feast-or famine lifestyle: due to intermittent exposure of nutrients |
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exponential growth in non-lab environments? |
is the exception, not the rule. Most soil bacteria for example, in nature grow at 1% the rate they would grow at in the lab |
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predominant mode of bacterial growth in natural environments? |
in biofilms! |
