Communities & Ecosystems Completed - Chapters 31 32...

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Introductory Chemistry: A Foundation
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Chapter 11 / Exercise 8
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Chapters 31 & 32Communities and Ecosystems1.Define the following terms using your book, power point presentations, internet and otheravailable resources:Keystone Species: Species whose activities significantly affect community structure.Top Predator: Predators with no predators of their own. Biodiversity: The variety of life on Earth.Niche: The ecological niche of a species is defined by the role it plays in its community, the habitat, and its interactions with other species.Interspecific Competition: Species compete with one another for resources, such as light, space, and nutrients.Competitive Exclusion: The competitive exclusion principle states that no two species occupy exactly the same niche.Coexistence: The niche specialization that permits the coexistence of multiple species can be very subtle.Resource Partitioning: Mechanism that increases the number of niches by apportioning the supply of a resource, such as food or living space, between species.Predation: Interaction in which one organism (the predator) uses another (the prey) as a food source.Parasitism: Symbiotic relationship in which one species (the parasite) obtains nutrients from another species (the host) but does not usually kill the host.Host: Species that a parasite gets nutrients from.Mimicry: The similarity of one species to another which protects one or both.Batesian Mimicry: A form of mimicry typified by a situation where a harmless species has evolved to imitate the warning signals of a harmful species directed at a common predator.Mullerian Mimicry: A natural phenomenon when two or more harmful species, that may or may not be closely related and share one or more common predators, have come to mimic each other's warning signals.Mutalism: A symbiotic relationship in which both organisms benefit.Commensalism: A class of relationship between two organisms where one organism benefits but the other is neutral (there is no harm or benefit).Coevolution: Joint evolution in which one species exerts selective pressure on the other species.Succession: Gradual replacement of communities in an area following a disturbance (secondary succession) or the creation of new soil (primary succession).Primary Succession: Stage in ecological succession, which involves the creation of new soil.Secondary Succession: In ecological succession, the stage at which there is gradual replacement of communities in an area following a disturbance.Climax Community: In ecology, the community that results when succession has come to an end.
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Introductory Chemistry: A Foundation
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Chapter 11 / Exercise 8
Introductory Chemistry: A Foundation
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