Zones in lakes and oceans are delineated by depth, distance from shore, or light penetration. Different zones have different physical and chemical characteristics, such as temperature and salinity. Label the diagrams of zonation in lakes and oceans. Drag the labels to their correct targets on the diagrams below. Use the pink labels for the pink targets and the blue labels for the blue targets.

Look at the photo of the leaf. which term best describes this leaf?

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

The relationship between intron and exon