From top to bottom, what is the correct order of the layers of cells in a leaf? 1.the epidermis, guard cells, palisade mesophyll, spongy mesophyll, and epidermis again

2.xylem, phloem, guard cells, spongy mesophyll

3.the epidermis, spongy mesophyll, palisade mesophyll, and epidermis again

4.the epidermis, palisade mesophyll, spongy mesophyll, and epidermis again

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

Urgent. the table shows the relative blood flow through some organs in the human body that is, the percentage of blood that flows through a given organ, through which organ(s) does all the blood flow? explain the effect of exercise on blood flow to skeletal muscles.

Why did the federal government end its support of yucca mountain as a site for long-term storage of nuclear water