During a visit to the circus, you and a friend stumble into a tent with a "freaks of nature" display. your friend points out a photograph of a man whose left arm is protruding from his left hip rather than from his shoulder. you explain to your friend that this condition was likely caused by a mutation in the man's

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

How does a gymnosperm prevent itself from pollinating the same tree

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?