Bio Vocab 4 - 7 Population density – Number of organisms...

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Arko Dewri Period 4 Biology 9H 2/26/2010 Chapter 4 Vocabulary 4.1 1. Carrying capacity – Largest number of individuals in a species that an environment can support long-term. 2. Density-dependent factor – Environmental factor, such as predation, disease, and competition, that depends on the number of members in a population per unit area. 3. Density-independent factor – Environmental factor, such as storms and extreme heat or cold, that affects populations regardless of their density. 4. Dispersion – Arrangement of a population in its environment. 5. Emigration – Movement of individuals away from a population. 6. Immigration – Movement of individuals into a population.
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Unformatted text preview: 7. Population density – Number of organisms per unit of living area. 8. Population growth rate – How fast a specific population grows. • 4.2 9. Age structure – IN any population, the number of individuals in their pre-reproductive, reproductive, and post-reproductive years. 10. Demographic transition – Population change from high birth rates and death rates to low birth rates and death rates. 11. Demography – Study of human populations based on size, density, movement, distribution, and birth and death rates. 12. Zero population growth – Occurs when the birthrate equals the death rate....
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