5. Which activity might lead to damage of a microscope and specimen? (1) cleaning the ocular and objectives with lens paper
(2) focusing with low power first before moving the high power into position
(3) using the coarse adjustment to focus the specimen under high power
(4) adjusting the diaphragm to obtain more light under high power

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

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?

Why has two different alleles for the same trait?