- carapace to camouflage themselves • Thousands of Epiphytes There are"thousands" of examples of parasitic relationships For many

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Evolutionary Mechanisms - 14 The Adaptive Strategy of Symbiosis In a symbiosis, two types of organisms become closely associated with each other so that survival depends on both organisms. Symbiosis can be Mutually beneficial (mutualism) Beneficial to one, but neutral to the second (commensalism) Harmful to one, but beneficial to the second (parasitism) Some examples of mutualisms are: Cleaner Fish and Sharks Nitrogen fixing Rhizobium and Legumes Corals and Dinoflagellates Ants and a variety of mutualistic partners including the acacia trees Root Nodules ClownFish and Anemone Azteca Ant and the Acacia Some examples of commensal relationships are Demodex , our facial mites Intestinal and skin bacteria Decorator crabs, which benefit from the organisms they attach to their
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Unformatted text preview: carapace to camouflage themselves. • Thousands of Epiphytes There are "thousands" of examples of parasitic relationships. For many humans, the debilitating effects of parasites reduces their survival so that common illnesses become life threatening. The selection of phenotypes that have beneficial adaptations for their surroundings can result in population changes from generation to generation, so that species can change over time. It's crucial to look at any adaptation in the context of its surroundings. Features with adaptive value in one habitat many be negative in a second. Also, adaptations must be inheritable to be subject to selection and evolution....
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This note was uploaded on 12/29/2011 for the course BIO 151 taught by Professor Edwards during the Spring '10 term at SUNY Stony Brook.

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