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Unformatted text preview: Aggregation : to be attracted to the same stimulus without interacting much with each other. Example : elephant seals come together on sheltered beaches because many are not safe. Also, wildebeest in migration aggregate in large herds. Alarm Call : an antipredator adaptation referring to various vocalizations emitted by animals in response to danger. Example : blackbirds have characteristic calls and many times are heard in gardens. Association : a group of plants of one or more species living together under uniform environmental conditions and having a uniform and distinctive aspect. It is the “ultimate classification level” of ecological systems. Example : fungi live and form together under uniform environmental conditions and have the same distinctive aspect of life. Biofilm : a complex structure adhering to surfaces that are regularly in contact with water, consisting of colonies of bacteria and usually other microorganisms such as yeasts, fungi, and protozoa that secrete a mucilaginous protective coating in which they are encased. Biofilms can form on solid or liquid surfaces as well as on soft tissue in living organisms. They are deadly to humans but are used for commercial environmental projects, such as treating sewage, industrial waste, and contaminated soil. Example : Biofilms can be found on rocks and pebbles at the bottom of most streams or rivers and often form on the surface of stagnant pools of water. Biofilms are important components of food chains in rivers and streams...
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This test prep was uploaded on 04/02/2008 for the course MCB 376 taught by Professor Staff during the Fall '07 term at Arizona.
- Fall '07