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Social Anxiety Disorder

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Social anxiety disorder?(SAD,?SAnD) (DSM-IV?300.23) is an?anxiety disorder?characterized by intense fear in social situations[1]?causing considerable distress and impaired ability to function in at least some parts of daily life. It is a rather extreme form of?social phobia?(SP), although the latter is sometimes treated synonymously.[1]?The diagnosis of social anxiety disorder can be of a?specific?disorder?(when only some particular situations are feared) or ageneralized?disorder. Generalized social anxiety disorder typically involves a persistent, intense,?chronic?fear of being judged by others and of beingembarrassed?or?humiliated?by one's own actions. These fears can be triggered by perceived or actual scrutiny from others.

Chapter 5

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Summary 1. Two major factors affect the number of species in a community: the latitude in terrestrial communities and pollution in aquatic systems. 2. Species play different roles in a community. Native species sustain the ecosystem in which they are a part. Some nonnative species will crowd out native species. Indicator species alert us to harmful changes in the community. Keystone species play ecological roles in the specific community: they may assist in pollination help regulate populations. Foundation species affect the community’s habitat to benefit other species. 3. Species interact with each other in these different ways: interspecific competition, predation, parasitism, mutualism, and commensalism.

Chapter 4

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Summary 1. Life emerged on the earth through two phases of development: a chemical evolution of the organic molecules, biopolymers, and systems of chemical reactions to form the first cells and the biological evolution from single-celled prokaryotic bacteria to single-celled eukaryotic creatures, and then to multicellular organisms. 2. Evolution is the change in a population’s genetic makeup over time. Evolution forces adaptations to changes in environmental conditions in a population. The diversity of life on earth reflects the wide variety of adaptations necessary and suggests that environmental conditions have varied widely over the life of the earth.

APWH earth and its people 4th edition chapter 2 outline

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APWH Earth and People 4th Edition : Book outline

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newron bernouli archimedes

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Arroyo 1 Mikayla Arroyo Period 6 1-26-10 Newton, Bernoulli, or Archimedes Newton?s, Bernoulli?s, and Archimedes? laws and principles are essential to our understanding of life and physics. Such as, when we can throw a ball harder, we make it go further, why objects float or sink, and how a wing of an aircraft or bird helps it fly. Out of the three physics concepts, Newton?s laws are the most important, Bernoulli?s principle is the second most, and then Archimedes? principle

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