| A | B |
|---|
| exponential growth | population growth pattern where a population grows faster as it increases in size; graph resembles a j-shaped curve |
| carrying capactiy | number of organisms of one species that an environment can support |
| density-dependent factor | factor such as disease, parasites, or food supply that has an increasing effect as populations increases |
| density-independent factor | factor such as temperature, storms, floods and habitat disruption that affects all populations, regardless of their density |
| demography | study of populations charcteristics such as growth rate, age structure, and geographical distribution |
| age structure | proportions of a population that are at different age levels |
| immigration | movement of individuals into a population |
| emigration | movement of individuals from a population |
| limiting factors | any biotic or abiotic factor that restricts the existence, numbers, and reproduction or distribution of organisms |
| predator | an organism that feeds upon another organism that is lower on the food-chain |
| prey | an organism that is fed upon by other organisms |
