| 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 species evolve adaptations that reduce the harm or improve the benefit of the relationship. | Coevolve. |
| 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 three properties of populations. | Size, density and dispersion. |
| 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. |
| A population regulating factor that happens in a crowded population. | Density dependent. |
| A population regulating factor that happens whether or not the population is crowded. | Density independent. |
| The unique role of a species within an ecosystem. | Niche. |
| The location where an organism lives. | Habitat. |
| The study of populations. | Demography. |
| The characteristics of a developed country. | Higher average incomes, slower population growth, industrial econonmics, strong social support systems. |
| The characteristics of developing countries. | Lower average incomes, simple and agriculture based economics, rapid population growth. |
| The distribution of ages in a specific population at a certain time. | Age structure. |
| The percentage of members of a group that are likely to survive to any given age. | Survivorship. |
| The number of babies born each year per 1,000 women in a population. | Fertility rate. |
| The average number of children a woman gives birth to in her lifetime. | Total fertility rate. |
| The movement of individuals between areas. | Migration. |
| The average number of years a person is likely to live. | Life expectancy. |
| 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. |
| When two species use the same food source at different times. | Indirect competition. |
