Biology 140- Quiz #2.docx - Biology 140 Quiz#2 Populations...

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Biology 140: Quiz #2: Populations: A group of individuals, of the same species, within a defined geographic area that can potentially interact with one another. Samples of a Population: In order to study a certain population, biologist do not measure every individual in the population but rather a subset of individuals in the population or a small portion of the specific geographic area. Quadrat : A quadrat is a plot used in ecology and geography to isolate a standard unit of area for study of the distribution of an item over a large area. A set of organisms in the population or ( quadrats or plots) is called a sample. The number of individuals in a sample is referred to as a sample size. Variation: In any biological system there is variation in characters among organisms in a population. Variation can depend on which organisms are caught and where they were caught. Variation can range from body lengths, the abundance of the species and the abundance of data.
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