Which sequence represents structures organized from most complex to least complex?
(1)chloroplast → guard cell → leaf → oak tree
(2)guard cell → chloroplast → leaf → oak tree
(3)oak tree → guard cell → leaf → chloroplast
(4)oak tree → leaf → guard cell → chloroplast

How many major plates cover the earth

Talking listening and reacting non verbally are all part of communicating

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