| A | B |
|---|
| Interaction between two species in which both are harmed. | Competition. |
| Interaction between two species in which one benefits and one is harmed. | Parasitism. |
| When one organism feeds on another organism. | Predation. |
| An interaction in which one species is helpful to the other. | Mutualism. |
| A relationship in which one species benefits and the other species is neither helped nor harmed. | Commensalism. |
| The members of the same species living in the same place at the same time. | Population. |
| The birth rate minus the death rate. | Growth rate. |
| This type of population growth occurs when there is plenty of food and space, and no competition or predators. | Exponential growth. |
| The maximum population that an ecosystem can support indefinitely. | Carrying capacity. |
| Larger, more dense populations are more strongly affected by this type of limiting factor. | Density dependent. |
| The unique role of a species within an ecosystem. | Niche. |
| The study of populations. | Demography. |
| The distribution of ages in a specific population at a certain time. | Age structure. |
| The average number of children a woman gives birth to in her lifetime. | Total fertility rate. |
| The movement of individuals out of an area | Emigration. |
| What helps to decrease human population growth more than anything else? | Education and economic independence for women. |
| What has happened to death rates around the world in the last 200 years? Why? | It has declined. More people have good food, clean water, safe sewage disposal. |
| Name a density dependent factor that regulates population. | Contagious disease such as tuberculosis. |
| Name a density independent factor that regulates population. | Severe weather or a natural disaster. |
| The supply of this resource will determine the carrying capacity of an ecosystem. | Limiting resource. |
