Hummingbird bill length data was collected and graphed in a particular environment. based on the data collected, which is the best conclusion drawn? a) the environment is selecting against all longer bill length birds. b) due to natural selection, a virus has killed off all medium bill length birds. c) the environment has a greater amount of long nectar tubed flowers and short nectar tubed flowers causing disruptive selection in medium bill length birds. d) the environment has a greater amount of long nectar tubed flowers and short nectar tubed flowers causing stabilizing selection in medium bill length birds.

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area