Rizzo_lect10

Rizzo_lect10 - Flagella 1 2 3 A symbiosis represents: 1. an...

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1 Flagella
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2
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3
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4 A symbiosis represents: 1. an interaction between two or more organisms in which all organisms benefit. 2. an interaction between two organisms in which one organism benefits and another is negatively impacted. 3. an interaction between two organisms in which one organism benefits and the other is not impacted in any way. 4. a range of interactions between two or more organisms, including examples of choices 1, 2 and 3 above.
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5 Symbiosis Intimate association between at least two different organisms in which at least one of them benefits
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6 Classes of symbiosis 0 + Commensalism - + Parasitism + + Mutualism B A
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7 Parasite: an organism living on or in another organism and obtaining its nutrients and energy at the expense of the second organism. A parasite may or may not be a pathogen. P athogen: a biological agent that causes disease to its host.
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8 Disease : injurious physiological activity caused by the continuous irritation by a primary causal factor and expressed in characteristic pathological conditions called symptoms
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9 Pathogenicity is ability to enter a host and cause disease Virulence is the degree of pathogenicity
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Types of disease Infectious: a disease that is caused by a pathogen which can spread from a diseased to a healthy host. Non-infectious:
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This document was uploaded on 04/02/2009.

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Rizzo_lect10 - Flagella 1 2 3 A symbiosis represents: 1. an...

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