A population with a population pyramid that has an extremely broad base will most likely be:
| 1. | a rapidly expanding population |
| 2. | a stable population |
| 3. | a population where the birth rate equaled the death rate |
| 4. | a population where there were more old than young individuals |
Ultimately the size of a population in a given area is determined by:
| 1. | the biotic potential |
| 2. | mortality rates and natality rates |
| 3. | carrying capacity of its environment |
| 4. | rate of immigration and emigration |
| I: | Natality |
| II: | Mortality |
| III: | Immigration |
| IV: | Emigration |