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KEY CONCEPT Each population has a density, a dispersion, and a reproductive strategy.

KEY CONCEPT Each population has a density, a dispersion, and a reproductive strategy. Population density is a measurement of the number of individuals living in a defined space. Scientists can calculate population density. Clumped dispersion. Uniform dispersion. Random dispersion.

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KEY CONCEPT Each population has a density, a dispersion, and a reproductive strategy.

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  1. KEY CONCEPT Each population has a density, a dispersion, and a reproductive strategy.

  2. Population density is a measurement of the number of individuals living in a defined space. • Scientists can calculate population density.

  3. Clumped dispersion Uniform dispersion Random dispersion Geographic dispersion of a population shows how individuals in a population are spaced in an area.

  4. clumped • There are three types of dispersion.

  5. uniform • There are three types of dispersion.

  6. random • There are three types of dispersion.

  7. A survivorship curve is a diagram showing the number of surviving members over time from a measured set of births. • Type I—low level of infant mortality and an older population • common to large mammals and humans • Type II—survivorship rate is equal at all stages of life • common to birdsand reptiles • Type III—very high birth rate, very high infant mortality • common to invertebrates and plants

  8. Survivorship curves help to describe the reproductive strategy of a species. • A survivorship curve is a diagram showing the number of surviving members over time from a measured set of births.

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