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Biology
WCHS Biology Chapter 4
| Word | Definition |
|---|---|
| Exponential Growth | growth pattern where a population grows faster as it increases in size; graph of a exponentially growing population resembles a J-shaped curve |
| Carrying Capacity | number of organisms of one species that an environment can support indefinitely; populations below carrying capacity tend to increase; those above carrrying capacity tend to decrease |
| Life-history pattern | an organism's pattern of reproduction; may be rapid or slow |
| Density-dependent factor | limiting factors such as disease, parasites, or food availablity that affect growth of a population |
| Density-independent factor | factor such as temperature, storms, floods, drought, or habitat disruption that affects al populations, regardless of their density |
| Demography | study of population characteristics such as growh rate, age structure, and geographic distrubution |
| Brithrate | number of live births per 1000 population in a given year |
| Death Rate | number of deaths per 1000 population in a given year |
| Doubling Time | time needed for a population to double in size |
| Age Structure | proportions of a population that are at different age levels |
Created by:
dmoudy
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